Information
-
Patent Grant
-
6788908
-
Patent Number
6,788,908
-
Date Filed
Wednesday, April 24, 200222 years ago
-
Date Issued
Tuesday, September 7, 200419 years ago
-
Inventors
-
Original Assignees
-
Examiners
Agents
- Fitzpatrick, Cella, Harper & Scinto
-
CPC
-
US Classifications
Field of Search
US
- 399 107
- 399 109
- 399 111
- 399 113
- 399 114
-
International Classifications
-
Abstract
A disassembling method is disclosed for a process cartridge detachably mountable to a main assembly of an electrophotographic image forming apparatus. The process cartridge includes covering members connected to a drum supporting frame and a developer container at ends of the drum supporting frame and the developer accommodating container with respect to a longitudinal direction of the electrophotographic photosensitive drum. The disassembling method includes a step of cutting the cover member adjacent to a connecting portion between the cover member and the drum supporting frame and a connecting portion between the cover member and the developer accommodating container along an outer wall of the covering member.
Description
FIELD OF THE INVENTION AND RELATED ART
The present invention relates to a process cartridge remanufacturing method, a process cartridge disassembling method involved in a process cartridge remanufacturing method, a process cartridge assembling method, a positioning/fastening apparatus, and a process cartridge.
The term “process cartraidge” means: a cartridge in which a charging means, a developing means or cleaning means, and an electrophotographic photoconductive drum, are integrally disposed, and which is removably mountable in the main assembly of an image forming apparatus; a cartridge in which a minimum of one processing means among a charging means, a developing means, and a cleaning means, and an image bearing means, are integrally disposed, and which is removably mountable in the main assembly of an image forming apparatus; or a cartridge in which a minimum of a charging means and an electrophotographic photoconductive drum, are integrally disposed, and which is removably mountable in the main assembly of an image forming apparatus.
An image forming apparatus includes an electrophotographic copying machine, an electrophotographic printer (for example, LED printer, laser beam printer, and the like), an electrophotographic facsimile, an electrophotographic word processor, and the like.
In an image forming apparatus which employs an electrophotographic image formation process, a process cartridge system has long been employed. According to this system, an electrophotographic photoconductive member, and a single or plurality of processing means, which act on the electrophotographic photoconductive member, are integrated into a form of a cartridge removably mountable in the main assembly of the image forming apparatus. This system enables a user him/her self to maintain the apparatus without relying on a service person, immensely improving the operability of the apparatus. Thus, the process cartridge system has been widely used in the field of an image forming apparatus.
A process cartridge such as the one described above forms an image on a recording medium with the use of a developer contained therein. Therefore, the amount of the developer therein gradually decreases with image formation, eventually to a level below which it fails to form an image satisfactory in quality to the user who purchased the process cartridge. At this point, the process cartridge loses its commercial value.
Thus, it has long been desired to realize a simple method for remanufacturing a process cartridge so that a process cartridge which has lost its commercial value due to the depletion of the developer therein can be marketed again.
SUMMARY OF THE INVENTION
The primary object of the present invention is to provide a simple method for remanufacturing a process cartridge.
Another object of the present invention is to provide a method for remanufacturing a process cartridge, the commercial value of which has been lost due to the consumption of the developer therein to a level below which the process cartridge fails to forms an image satisfactory in quality to a user who has purchased the process cartridge.
Another object of the present invention is to provide a process cartridge disassembling method for remanufacturing a process cartridge, a process cartridge assembling method for remanufacturing a process cartridge, and a positioning/fastening apparatus used with the process cartridge assembling method.
Another object of the present invention is to provide a method for disassembling a process cartridge, which is removably mountable in the main assembly of an electrophotographic image forming apparatus, and comprises: an electrophotographic photoconductive drum; a developing means for developing an electrostatic latent image formed on the electrophotographic photoconductive drum; a drum holding frame for rotationally supporting the electrophotographic photoconductive drum; a developer container for storing the developer to be supplied to the developing means; a developing means holding frame for holding the developing means; a pair of covering members attached to the end surfaces, in terms of the lengthwise direction of the electrophotographic photoconductive member, of the combination of the drum holding frame and developer container, one for one, in a manner to cover virtually the entireties of the end surfaces, comprising: a step in which the joints between the covering members and the combination of the drum holding frame and developer container are cut along the inwardly facing edges of the covering members.
These and other objects, features, and advantages of the present invention will become more apparent upon consideration of the following description of the preferred embodiments of the present invention, taken in conjunction with the accompanying drawings.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1
is a vertical sectional view of a process cartridge.
FIG. 2
is a schematic vertical sectional view of an electrophotographic image forming apparatus.
FIG. 3
is an exploded perspective view of the process cartridge.
FIG. 4
is a perspective view of the process cartridge in the first embodiment of the present invention, as seen diagonally from above.
FIG. 5
is a perspective view of the process cartridge in the first embodiment of the present invention, as seen diagonally from below.
FIG. 6
is a perspective view of the process cartridge in the second embodiment of the present invention, as seen diagonally from above.
FIG. 7
is a perspective view of the process cartridge in the second embodiment of the present invention, as seen diagonally from below.
FIG. 8
is a perspective view of the process cartridge in the third embodiment of the present invention.
FIG. 9
is a perspective view of the positioning member in the third embodiment of the present invention, as seen diagonally from above.
FIG. 10
is a perspective view of the inverted positioning member in the third embodiment of the present invention.
FIG. 11
is a perspective view of a fastening member.
FIG. 12
is a perspective view of the inverted fastening member.
FIG. 13
is a perspective view of the assembled positioning/fastening apparatus.
FIG. 14
is a perspective view of one of the lengthwise ends of the process cartridge, to the side cover of which positioning members have been attached.
FIG. 15
is a perspective view of one of the lengthwise ends of the process cartridge, to the side cover of which the fastening members have been engaged to the positioning members after the cutting of the frames.
FIG. 16
is a perspective view of the positioning members in the fourth embodiment of the present invention.
FIG. 17
is a perspective view of the assembled positioning/fastening apparatus in the fourth embodiment.
FIG. 18
is a perspective view of the positioning/fastening apparatus in the fifth embodiment of the present invention.
FIG. 19
is a perspective view of the positioning member in the fifth embodiment.
FIG. 20
is a perspective view of the fastening member in the fifth embodiment.
FIG. 21
is a perspective view illustrating a toner supply operation.
DESCRIPTION OF THE PREFERRED EMBODIMENTS
Referring to
FIGS. 1
to
5
, the preferred embodiments of the present invention will be described. In the following embodiments, the lengthwise direction means the direction which is perpendicular to the recording medium conveyance direction and parallel to the surface of a recording medium being conveyed.
(Embodiment 1)
(Description of process Cartridge and Apparatus Main Assembly)
FIG. 1
shows a sectional view of a process cartridge in accordance with the present invention, at a plane perpendicular to its lengthwise direction.
FIG. 2
is a sectional view of an image forming apparatus in accordance with the present invention, at a plane perpendicular to the lengthwise direction of the process cartridge. This process cartridge is equipped with an electrophotographic photoconductive member, and a plurality of processing means which act on the electrophotographic photoconductive member. As the processing means, for example, there are a charging means for charging the peripheral surface of the electrophotographic photoconductive member, a developing apparatus for forming a toner image on the electrophotographic photoconductive member, and a cleaning means for removing the residual toner remaining on the peripheral surface of the electrophotographic photoconductive member.
Referring to
FIG. 1
, the process cartridge
15
in this embodiment comprises: a charging roller
12
as a charging means: a combination of a development roller
18
and a development blade
26
, as a developing apparatus; a cleaning blade
14
as a cleaning means; and a housing, or cartridge, in which the charge roller
12
, developing apparatus, and cleaning means are integrally disposed around the electrophotographic photoconductive member
11
, so that they can be removably mounted in the image forming apparatus main assembly
27
(which hereinafter will be referred to as apparatus main assembly).
This process cartridge
15
is mounted in an electrophotographic image forming apparatus C, such as the one shown in
FIG. 2
, to be used for an image forming operation. In an image forming operation, a sheet S is conveyed by a pair of conveying rollers
7
from a sheet cassette
6
mounted in the bottom portion of the apparatus main assembly
27
. In synchronism with the conveyance of the sheet S, the peripheral surface of the photoconductive drum
11
is selectively exposed by an exposing apparatus
8
through an exposure opening
61
, forming a latent image on the peripheral surface of the photoconductive drum
11
. Meanwhile, the toner in the toner storage container
16
is coated in a thin layer on the peripheral surface of a development roller
18
by a development blade
26
, while being electrically charged by the friction between the toner and blade
26
, and a predetermined development bias is applied to the development roller
18
. As the development bias is applied, the toner on the peripheral surface of the development roller
18
is transferred onto the peripheral surface of the photoconductive drum
11
in accordance with the latent image, creating a toner image. The thus created toner image is transferred, by the application of bias voltage to a transfer roller
9
, onto the sheet S as a recording medium which is being conveyed. Thereafter, the sheet S is conveyed to a fixing apparatus
10
, in which the toner image is fixed to the sheet S. After the fixation, the sheet S is discharged into a delivery portion
2
on top of the apparatus main assembly. Meanwhile, the toner which remained on the peripheral surface of the photoconductive drum
11
after the toner image transfer is removed by the cleaning blade
14
. The removed toner is moved inward of a removed toner bin
5
by an unshown removed toner moving member.
(Structure of Process Cartridge Frame)
FIGS. 3
to
5
are perspective views of the process cartridge
15
, for showing the frame structure thereof.
FIG. 3
shows the process cartridge
15
before its assembly, and
FIGS. 4 and 5
show the cartridge
15
after it assembly. The frame of the cartridge
15
comprises three frames: a cleaning means holding frame
13
, in which the drum
11
, charge roller
12
, and blade
14
are integrally supported; a developing means frame
17
, in which the development roller
18
, and the development blade (which is not shown in
FIG. 3
, but is designated by reference code
26
in
FIG. 1
) are integrally supported; and a toner holding frame, that is, a toner container
16
. Further, the cartridge
15
comprises a pair of side covers
19
and
20
for integrally holding these three frames together. The side covers
19
and
20
are secured to the lengthwise ends of the combination of the cleaning means holding frame
13
and toner container
16
, whereas the developing means holding frame
17
is supported by the cleaning means holding frame
13
.
To the frame
13
, the blade
14
, charge roller
12
, a removed toner moving member, and drum
11
are attached. More specifically, the blade
14
is attached with the use of small screws or the like. As for the charge roller
12
, the end portions of the metallic core of the charge roller
12
are attached, with the interposition of bearings (unshown), so that the charge roller
12
is rotationally supported by the frame
13
. The unshown removed toner moving member for sending the toner removed by the blade
14
, into the removed toner bin
5
, is rotationally attached to the frame
13
, as shown in FIG.
1
. As for the drum
11
, its flange portions
11
a
and
11
b
at the lengthwise ends are supported by the frame
13
, with the interposition of bearing
22
a
and another bearing, respectively, so that the drum
11
is rotationally supported by the frame
13
. The frame
16
contains toner, and stirring members
113
,
114
, and
115
(
FIG. 1
) for stirring the toner in the frame
16
while conveying the toner.
The developing means holding frame
17
is supported by the cleaning means holding frame
13
.
The side covers
19
and
20
are large enough in size to match the size of the entirety of the cross section of the cartridge
15
perpendicular to the lengthwise direction of the cartridge
15
. They constitute the lengthwise end portions of the cassette
15
, one for one, integrally supporting the frame
13
and container
16
in such a positional relationship that the axial lines of the holes
19
a
and
20
a
of the side covers
19
and
20
coincide with the axial line of the photoconductive drum
11
supported by the frame
13
. On the side cover
19
side of the cartridge
15
, that is, on the side of the side cover shown in the drawing, the bearing
22
a
is fitted in the hole
13
a
of the frame
13
(it was pressed into the hole), and an axle
25
rotationally supports one end of the drum
11
by being put through the hole
19
a
of the cover
19
, bearing
22
a
, and the center hole
11
a
1
of the flange
11
a
. As the axle
25
is put through the holes, the side cover
19
is properly positioned relative to the combination of the frame
13
and container
16
, with the interposition of the bearing
22
a
, being therefore accurately positioned relative to the drum
11
. Further, a positioning portion
19
b
, positioned so that it will be as far away as possible from the drum
11
after the attachment of the side cover
19
, is fitted into the positioning portion
13
b
on the inward surface of the side wall
13
c
of the frame
13
, fixing the attitude of the side cover
19
relative to the frame
13
in terms of the circumferential direction of the drum
11
. Then, the cover
19
is secured to the side wall
13
c
, or one of the side walls of the frame
13
in terms of the lengthwise direction. The container
16
is provided with a pair of positioning portions
16
a
and
16
b
which protrude outward from the side wall
16
d
, that is, one of the side walls of the container
16
in terms of the lengthwise direction. These positioning portions
16
a
and
16
b
are fitted into a pair of positioning portions
19
c
and
19
d
, that is, a pair of holes, of the cover
19
, fixing the position of the container
16
relative to the side cover
19
, and the container
16
and side cover
19
are welded to each other. The cover
20
, or the cover for the other lengthwise end of the cartridge
15
, is also positioned relative to the container
16
and frame
13
, and is secured thereto by welding, as is the cover
19
. The developing means holding frame
17
is properly positioned with the use of a method which will be described later. The bearings
22
(
22
a
and the other bearing supporting the flange portions
11
a
and
11
b
) also function as members for properly positioning the cartridge
15
relative to the image forming apparatus main assembly
27
.
Toner is supplied to the development roller
18
from the frame
16
. For this purpose, the container
16
and frame
17
are provided with holes
16
c
(
FIG. 1
) and
17
a
, respectively. The frame
17
and container
16
are connected by a flexible sealing member
21
placed between them in a manner to connect the holes
17
a
and
16
c
. The attitude of the container
16
is fixed relative to the side covers
19
and
20
, whereas the attitude of the frame
17
is fixed relative to the frame
13
. Therefore, a gap must be provided between the frame
17
and container
16
in order to compensate for the dimensional manufacture errors. The positional relationship between the cartridge
15
and apparatus main assembly
27
is accurately fixed as the lengthwise end of the frame
13
, on the side where the drum
11
is supported, is accurately positioned relative to the cartridge mounting space of the apparatus main assembly
27
, when the cartridge
15
is mounted in the apparatus main assembly
27
. There is a substantial difference in the weight of the container
16
between when the container
16
contains a large amount of toner and when it is empty. This raises a possibility that the container
16
, or covers
19
and
20
, will be distorted. Thus, a flexible substance is employed as the material for the sealing member
21
.
With the provision of the above described structure, the load from the container
16
, which varies depending on the amount of the toner therein, is applied only to the side covers
19
and
20
, being prevented from being applied to the development roller
18
even when a large amount of toner is in the container
16
. Therefore, the photoconductive drum
11
is not subjected to an unnecessary load. Therefore, it is possible to always obtain a satisfactory image.
(Structure of Developing Means Holding Frame)
Referring to
FIGS. 1 and 3
, the structure of the developing means holding frame will be described.
FIG. 3
is a drawing of the process cartridge prior to its assembly.
FIG. 1
is a drawing for describing the pressure applied to the developing means holding frame.
The developing means holding frame
17
contains the development roller
18
as a developer bearing member, a development blade (FIG.
1
), and a pair of magnetic seals (unshown). The development roller
18
contains a magnetic roll
18
a
, which is put through the center hole of the development roller
18
and nonrotationally supported by the frame
17
by its lengthwise end portions, with the presence of a gap between the internal surface of the development roller
18
and the peripheral surface of the magnetic roll
18
a
. The development roller
18
itself is rotationally supported by the frame
17
by its lengthwise end portions. For the purpose of supplying electrical power to the development roller
18
, an electrical contact point is placed in the hollow of the development roller
18
. Further, a pair of spacer rings
118
a
and
118
b
(
FIG. 3
) for keeping constant the distance between the peripheral surfaces of the drum
11
and development roller
18
are fitted around the lengthwise end portions of the development roller
18
, one for one.
The developing means holding frame
17
is supported by the frame
13
, being enabled to pivot about the axial line of a hole
17
d
provided in the end portion of the arm portion
17
c
, on the driven side, that is, the lengthwise end of the cartridge
15
from which the cartridge
15
is driven, so that the drum
11
and roller
18
are kept pressured toward each other in a manner to reduce the distance between the axial lines of the drum
11
and roller
18
. More specifically, the frame
17
equipped with the roller
18
is attached to the frame
13
by fitting the pin
60
fitted in the hole
17
d
of the developing means holding frame
17
, on the driven side, into the hole of the frame
13
, on the driven side, in such a manner that the developing means holding frame
17
is enabled to pivot about the axial line of the hole
17
d
. By comparison, the frame
13
and container
16
are simply connected to each other, being not allowed to move relative to each other. Thus, the frame
17
is enabled to move relative to the container
16
. Further, one end of an unshown tension spring is hung around a spring hanger, with which one of the lengthwise end portions of the frame
13
is provided, and the other end of the tension spring is hung around the spring hanger of the frame
17
, being stretched so that the end of the roller
18
is kept pressured toward the end of the drum
11
, on the same side.
On the non-driven side, a bearing
17
e
for rotationally supporting the development roller
18
is attached to the frame
17
so that the axial lines of the cylindrical portion of the bearing
17
e
and development roller
18
coincide, and that the bearing
17
e
is kept pressured toward the axial line of the drum
11
.
More specifically, the bearing
17
e
whose cylindrical portion is inserted in a groove
19
e
(which in this embodiment is an elongated hole extending in the radius direction of the drum
11
), is enabled to slide in a direction parallel to the radius direction of the drum
11
. In other words, the bearing
17
e
also constitutes a member for allowing the one end of the roller
18
to move. Within the groove
19
e
, an unshown compression spring is fitted to keep the bearing
17
e
under pressure while allowing the bearing
17
e
to slide following the groove
19
e.
The groove
19
e
also bears a role of a positioning member for regulating the direction in which the development roller
18
moves.
The joint between the container
16
and developing means holding frame
17
must be sealed while keeping the holes
16
c
and
17
a
of the container
16
and frame
17
, respectively, connected. On the other hand, the frame
17
and container
16
are enabled to move relative to each other. Thus, the sealing member
21
enabled to afford the frame
17
and container
16
a certain amount of movement relative to each other is interposed between the frame
17
and container
16
to prevent toner leakage. The sealing member
21
is attached to the edges of the holes
16
c
and
17
a
in a manner to surround the holes
16
c
and
17
a
. The sealing member
21
is desired to be shaped to prevent its resiliency from interfering the movement of the frame
17
; it is desired to have a minimum of one folding line, or to be in the form of bellows.
Although not shown in the drawing, the toner seal for sealing the hole
16
c
is pasted to the lip portion of the hole
16
c
covered with the sealing member
21
. One of the lengthwise ends of the toner seal extends outward from between the sealing member
21
and container
16
, making it possible for the toner seal to be removed from the outside.
As for the driving system, the drum
11
is provided with a power input coupling
23
, which is solidly attached to one of the lengthwise ends of the drum
11
, as shown in FIG.
5
. The drum
11
and roller
18
are connected by a pair of gears. To one end of the stirring member
114
, an power input coupling
24
is solidly fixed. The stirring gears
113
,
114
, and
115
are connected through an unshown gear train.
The above listed gears are disposed on the same side of the cartridge as the power input couplings
23
and
24
, and are covered with cover
20
. On the opposite side of the cartridge in terms of the lengthwise direction, that is, the side opposite to where the power output coupling
24
is located, the end of the stirring member
114
is connected to the unshown removed toner moving member within the frame
13
, through an unshown gear train, which is covered with the side cover
19
.
Referring to
FIG. 2
, the cartridge
15
is mounted into, or dismounted from, the apparatus main assembly
27
in the following manner. First, an unshown front cover located on the front side of the apparatus main assembly
27
is to be opened. As the cover is opened, an opening through which the cartridge
15
can be put is exposed. The cartridge
15
is inserted into the apparatus main assembly
27
through this opening. After the insertion, the cartridge
15
is to be pivoted to allow the cartridge
15
to descend into the apparatus main assembly
27
so that the drum
11
comes into contact with the transfer roller
9
. Then, the unshown front cover of the apparatus main assembly
27
is to be closed. As the front cover is closed, the power output couplings of the apparatus main assembly
27
are moved by the movement of the front cover, being coupled with the power input couplings
23
and
24
on the cartridge side. In order to dismount the cartridge
15
from the apparatus main assembly
27
, the above described steps are to be followed in reverse.
The aforementioned exposure opening
61
is in the top surface of the frame
13
. Here, the top surface means the surface which constitutes the top surface when the cartridge
15
is in the apparatus main assembly
27
. As for the transfer opening
62
for toner image transfer, it is between the frames
13
and
17
.
The frame
13
, the container
16
, the frame
17
, and the side covers
19
and
20
are formed of shock resistant polystyrene HIPS, for example.
The covers
19
and
20
are shaped like a lidless container, being open on the sides which face the side walls
16
d
and
13
c
, in terms of the lengthwise direction, of the container
16
and frame
13
, respectively. The rim portions
19
g
and
20
g
of the covers
19
and
20
are joined with the edges of the side walls
16
d
and
13
c
of the container
16
and frame
13
, respectively, after the following steps. First, after the mounting of the development roller
18
and development blade
26
into the frame
13
, and the drum
11
, the charge roller
12
, the cleaning blade
14
, into the frame
13
, the frame
17
is connected to the frame
13
. Further, the stirring members
113
,
114
, and
115
are mounted into the container
16
, and the hole
16
c
is hermetically sealed with the unshown toner seal. Then, toner is filled into the container
16
through the toner inlet
16
f
of the side wall
16
d
of the container
16
. Then, the toner inlet
16
f
is plugged with a toner cap
16
g
, completing the filling of the toner. After the filling of the toner, the container
16
is joined with the frame
17
, with the interposition of the sealing member
21
which allows the frames
13
and
17
to move relative to each other after the joining. Thereafter, the aforementioned gears of the driving system are attached. Next, the frame
13
, container
16
, and side covers
19
and
20
, are set in the jig which keeps them accurately positioned relative to each other in terms of their predetermined relationship in a process cartridge into which they will be integrated; in other words, they are temporarily assembled on the jig. Then, melted resin is poured into the grooves provided in the side covers
19
and
20
, along the edges
19
g
and
20
g
, through the resin paths provided in advance in the side covers
19
and
20
. As a result, the covers
19
and
20
are welded to the frames
13
and container
16
by the resin. The joints
65
created by the above described process are shown in
FIGS. 4 and 5
. The employment of this type of resin based joining method does not deform the frames as does the employment of a jointing method which uses screws. It creates a stronger joint, and also affords the side cover a larger interior space, making component arrangement easier.
The cartridge
15
is provided with a drum shutter
63
, which keeps the transfer opening
62
covered when the cartridge
15
is out of the apparatus main assembly
27
. As described before, the transfer opening
62
is an opening for allowing the drum
11
to be placed in contact with the transfer roller
9
. The drum shutter
63
is held to the side covers
19
and
20
by the mechanical link.
As the toner within the container
16
is depleted due to consumption, it is displayed on the monitor of the apparatus main assembly
27
that there is no toner in the cartridge
15
. Then, this toner depleted cartridge
15
is recovered for cartridge remanufacture.
(Cartridge Disassembling Method)
Next, referring to
FIGS. 4 and 5
, a method for disassembling the above described process cartridge will be described.
First, the drum shutter
63
is to be removed.
In
FIGS. 4 and 5
, a theoretical cutting line
64
follows the circumference of the side cover
19
(
20
), near the joint
65
between the side cover
19
(
20
) and the combination of the frame
13
and container
16
.
By cutting the cartridge
15
along these cutting lines, the side covers
19
and
20
can be removed from the cartridge
15
, leaving the joint
65
on the side of the main portion of the cartridge
15
.
After the removal of the side covers
19
and
20
in the above described manner, an unshown sleeve gear attached to the end of the development roller
18
, and unshown gears for transmitting a driving force to the toner conveying member
113
and
114
within the container
16
, or the like, can be removed.
Also, after the removal of the side covers
19
and
20
, the cartridge
15
is to be cut along a theoretical cutting line
66
connecting the lengthwise end of the exposure opening
61
and the above described cutting line
64
, and along a cutting line
67
connecting the lengthwise end of the transfer opening
62
and the above described cutting line
64
. With this procedure, the frame
13
can be virtually separated from the combination of the frame
17
and container
16
, with the drum
11
, the cleaning blade
14
, the charge roller
12
, and the like left attached to the frame
13
, and the development roller
18
, the development blade
26
, and the like, left attached to the combination of the frame
17
and the container
16
.
Next, the parallel pin
60
with which the frame
17
is pivotally supported by the frame
13
is to be removed. With this procedure, the frame
13
is completely separated from the combination of the frame
17
and the container
16
.
Then, the drum
11
, the blade
14
, the charge roller
12
, and the like, are detached from the frame
13
, and the development roller
18
, the development blade
26
, magnetic seals (unshown), and the like, are detached from the frame
17
.
Although it was described above as the disassembly order that the parallel pin
60
is to be removed after the cutting of the cartridge along the cutting lines
66
and
67
, the order may be reversed. Further, the removal of the gears and the like are possible anytime after the cutting along the cutting line
64
. For example, the unshown sleeve gears attached to the lengthwise ends of the development roller
18
may be detached immediately after the cutting along the cutting line
64
, whereas the gears and the like (components which are partially in the holes of the wall of the toner container
16
) for transmitting the driving force to the stirring members
113
,
114
, and
115
, and the like, may be removed after the complete separation of the frame
13
from the combination of the frame
17
and container
16
. In other words, the different groups of gears and the like may be removed at the different stages of cartridge disassembly. The employment of the above described disassembly procedure reduces the possibility that toner will scatter during the disassembly.
As for the cutting tools, an ultrasonic cutter, a circular saw, or the like, can be used.
Incidentally, when recycling the cartridge material without recycling the cartridge frame as it is, the projecting portions (
19
f
,
20
f
, and the like) of the covers
19
and
20
may be cut off before cutting the cartridge along the cutting line
64
, in order to make it easier to cut the cartridge along the cutting line
64
and the like.
As described above, according to the cartridge disassembling method in this embodiment of the present invention, the side covers are removed from the cartridge main structure by cutting the cartridge along predetermined cutting lines. Therefore, the driving force transmitting components, such as gears, can be easily removed for component recycling. Further, even when pulverizing and melting the cartridge components in order to recycle them as the cartridge material, that is, the various plastics, for the cartridge frame, the gears, and the like, the components can be more easily classified to reduce the recycling cost, and also to produce as pure cartridge materials as possible from the recycled cartridge components.
Further, the procedure for cutting the cartridge along the cutting line connecting the exposure opening and the cut portions (cutting line
64
), as well as the cutting line connecting the transfer opening and the cut portions (cutting line
64
), is carried out after the procedure for removing virtually the entireties of the side covers
19
and
20
, reducing the cutting time. Further, practically, the cartridge is cut into the cleaning means holding frame side, and the developing means holding frame/toner container combination side, virtually eliminating the possibility that the photoconductive drum, the development roller, and the like will be damaged during the disassembly, and also reducing the possibility that the waste toner in the cleaning means holding frame, and the toner remaining in the developing means holding frame and toner container, will be allowed to scatter.
(Embodiment 2)
In this embodiment, another process cartridge disassembling method will be described. A process cartridge compatible with the disassembling method in this embodiment, and a process cartridge compatible with the disassembling method in the first embodiment, are identical when they are new.
(Process Cartridge Disassembling Method)
Referring to
FIGS. 6 and 7
, the process cartridge disassembling method in this embodiment will be described. In
FIGS. 6 and 7
, theoretical cutting lines
68
extend from the lengthwise ends of the exposure opening
61
, one for one, in the lengthwise direction, to the corresponding outward edges of the covers
19
and
20
across the horizontal portions of the frame
13
and the horizontal portions of the covers
19
and
17
, downward to the bottom edges of the covers
19
and
20
across the vertical portions of the covers
19
and
20
, and reach the transfer opening
62
across the bottom surface of the covers
19
and
20
(portions of the cutting lines across the bottom surfaces of the covers
19
and
20
are not visible because of the manner in which the cartridge is positioned in the drawings). These cutting lines
68
are drawn approximately between the drum
11
and development roller
18
. Cutting the cartridge along these cutting lines
68
makes it possible to separate the frame
13
from the combination of the frame
17
and container
16
, while keeping the drum
11
, the blade
14
, the charge roller
12
, and the like attached within the frame
13
, and the development roller
18
, the development blade
16
, and the like, attached within the combination side.
After the cutting of the cartridge along the cutting line
68
, the cartridge is cut along a theoretical cutting line
69
(circular) to make a hole in the cover
20
as shown in FIG.
7
. The position of this hole coincides with that of the parallel pin
60
which pivotally holds the frame
17
to the frame
13
. Making a hole by cutting the cartridge along the cutting line
69
makes it possible to access the parallel pin
60
through the hole, allowing the pin
60
to be removed through the hole.
The removal of the parallel pin
60
makes it possible to completely separate the frame
13
from the combination of the frame
17
and container
16
.
After the complete separation of the frame
13
from the combination of the frame
17
and container
16
, the drum
11
, the cleaning blade
14
, the charge roller
12
, and the like are taken out of the frame
13
, and the development roller
18
, the development blade
16
, unshown magnetic seals, and the like are taken out of the developing means holding frame
17
.
As for the cutting tools, an ultrasonic cutter, a circular saw, or the like, can be used.
As described above, according to the process cartridge disassembling method in this embodiment of the present invention, a cartridge is cut only along the lines which connect the corresponding lengthwise ends of the exposure opening and the transfer opening. Therefore, the cutting distance is shorter, reducing therefore the disassembling time.
Further, the cartridge is cut into the cleaning means holding frame side, and the developing means holding frame/toner container combination side, eliminating the possibility that the photoconductive drum, the development roller, and the like will be damaged during the disassembly, and also reducing the possibility that the waste toner in the cleaning means holding frame, and the toner remaining in the developing means holding frame and the toner container, will be allowed to scatter. The waste toner and the remaining toner can be easily removed after the removal of the photoconductive drum, the development roller, and the like.
(Embodiment 3)
The process cartridge referenced in this third embodiment of the present invention, and the process cartridge referenced in the first embodiment of the present invention are identical, when they are new.
Hereinafter, the process cartridge remanufacturing method, the process cartridge disassembling method, the process cartridge assembling method, the positioning/fastening apparatus, and the process cartridge itself, will be described with reference to the appended drawings.
This third embodiment of the present invention relates to a method for disassembling a process cartridge by cutting the cartridge frame into a plurality of sections, a method for reassembling a process cartridge by recombining the plurality of cartridge sections resulting from the cutting of the cartridge frame, a process cartridge remanufacturing method comprising the above mentioned cartridge disassembling method and the cartridge reassembling method, a positioning/fastening apparatus for precisely recombining the plurality of frame sections resulting from the cutting of the cartridge frame, and a process cartridge compatible with the above methods and apparatus.
(Disassembling Method)
Here, referring to
FIGS. 8
to
14
, the cartridge disassembling method in this embodiment of the present invention will be described.
FIG. 8
is a perspective view of the lengthwise end portion of the process cartridge on the cover
19
side, after the pasting of a plurality of single-piece positioning members to the cartridge.
FIGS. 9 and 10
are enlarged perspective views of a single-piece positioning member.
FIGS. 11 and 12
are perspective views of a fastening member engaged with the positioning member, shown in
FIGS. 9 and 10
, when assembling a process cartridge. In this embodiment, a fastening member is not necessary when disassembling a process cartridge. However, in order to make it easier to understand the cartridge disassembling method in this embodiment, the positioning member and fastening member shown in
FIGS. 9
,
10
,
11
, and
12
will be described first.
Referring to
FIG. 9
, each single-piece positioning member
101
has a pair of receptacle portions
101
a
having a gap
101
g
into which the main portion of a fastening member
102
is inserted, and a connective portion
101
b
which connects the pair of the receptacle portions
101
a
. The thickness of the main portion
102
a
of the fastening member
102
is the same as the height (distance between top and bottom walls of receptacle portion) of the gap of the receptacle portion of the single-piece positioning member
101
. Each receptacle portion
101
a
has a projection
101
c
for properly positioning the fastening member
102
, and a hole
101
d
in which the locking projection of the fastening member
102
engages. Next, referring to
FIG. 10
which shows the back side of the single-piece positioning member
101
, a referential code
101
e
denotes the surface by which the single-piece positioning member is attached to the cover
19
or
20
of the cartridge
15
. The lip portions of the walls of the receptacle portion
101
a
, which surrounds the gap
101
g
into which the main portion
102
a
of the fastening member
102
is inserted are chamfered to make easier the insertion of the main portion
102
a
. A referential code F
1
denotes the distance between the end surfaces
101
h
of the walls surrounding the gap
101
g
, and the hole
101
d.
FIG. 11
is a perspective view of a fastening member
102
as seen from the direction corresponding to the direction from which the single-piece positioning member
101
is seen in FIG.
9
.
FIG. 12
is a perspective view of the fastening member
102
as seen from the direction corresponding to the direction from which the single-piece positioning member
101
is seen in FIG.
10
. The main portion
102
a
of the fastening member
102
is provided with a pair of recesses
102
b
which perfectly correspond to the position of the single piece positioning member
101
, and a pair of claw portions
102
c
which latch into the corresponding holes
101
d
of the single-piece positioning member
101
. The pair of arm portions
102
d
of the fastening member
102
are the portions that elastically deform to allow the pair of claw portions
102
c
to fit into the holes
101
d
. They can be elastically deformed by grasping the fastening member by the handle portions
102
e
in a manner to press the arm portions
102
d
in the direction indicated by an arrow mark A in FIG.
11
. The chamfered surface
102
f
of the fastening member
102
is provided for making easier the insertion of the fastening member
102
into the single-piece positioning member
101
. The distance F
2
between the handle portion
102
e
and claw portion
102
c
is the same as the distance F
1
between the end surfaces
101
h
of the walls surrounding the gap
101
g
, and the hole
101
d
, of the single-piece positioning member
101
.
As the main portion
102
a
of the fastening member
102
is pushed into the gaps
101
g
of the single-piece positioning member
101
, the projections
101
c
of the single-piece positioning member
101
fit into the recesses
102
b
of the fastening member
102
, and guide the fastening member
102
. After the contact between the claw portions
102
c
of the fastening members
102
and the chamfered surface
101
f
of the single-piece positioning member
101
, the fastening member
102
is to be pushed further into the single-piece positioning member
101
, while squeezing the handle portions
102
e
of the fastening member
102
in the arrow A direction against the resiliency of the arm portions
102
d
, until the trailing end of each handle portion
102
e
becomes flush with the end surfaces
101
h
of the walls surrounding the gap
101
g
of the single-piece positioning member
101
. The squeezing is to be stopped as the trailing end of each handle portion
102
e
becomes flush with the end surfaces
101
h
. As the handles portions
102
e
are released from the squeezing fingers, the claw portions
102
c
fit into the corresponding holes
101
d
of the single-piece positioning member
101
.
FIG. 13
is a perspective view of the single-piece positioning member
101
and fastening member
102
after the latter has been completely inserted into the former. Giving the single-piece positioning member
101
and fastening member the above described configurations and measurements, the two members are not allowed to move in any direction relative to each other: in other words, the two are rigidly engaged.
FIG. 8
is a perspective view of the lengthwise end portion of the cartridge, on the cover
19
side, after the attachment of a pair of the above described single-piece positioning members
101
to the side covers
19
and
20
. In this embodiment, the single-piece positioning members
101
are adhered to the covers
19
and
20
by the bottom surfaces
101
e
of the positioning members
101
. After the attachment of the single-piece positioning members
101
to the covers
19
and
20
, the covers
19
and
20
, and the single-piece positioning members
101
, are cut along a theoretical cutting line (indicated by dotted line P in the drawing), which runs between the pair of the receptacle portions
101
a
.
FIG. 14
shows the back side of the cartridge
15
. The covers
19
and
20
and the single-piece positioning members
101
, are also cut along the theoretical line P (indicated by dotted line P in the drawing), that is, the continuation of the theoretical line P in FIG.
8
. As a result, each single-piece positioning member
101
is cut into two symmetrical halves with a single receptacle portion, at the middle of the connective portion
101
b
, so that one of the pair of receptacle portions
101
a
remains on the portion of the side cover
19
(
20
) on the main structure side, that is, the inward side with respect to the theoretical line P, and the other receptacle portion remains on the portion of the side cover
19
(
20
) on the outward side with respect to the theoretical line P. Similarly on the cover
20
side, each single-piece positioning member
101
is cut in the same manner as it is on the cover
19
side. As a result, the cover
19
(
20
) is divided into a portion which remains attached to the main section of the cartridge, and a portion detached from the main section of the cartridge. As for the cutting tools, an ultrasonic cutter, a circular saw, or the like, can be used.
Next, the portions of the cartridge on the outward side of the exposure opening
61
in terms of the lengthwise direction are cut along the theoretical cutting line
66
in the first embodiment, and the portions of the cartridge on the outward side of the transfer opening
62
in terms of the lengthwise direction are cut along the theoretical cutting line
67
in the first embodiment. Thereafter, the frames
13
and
17
are separated from each other.
Then, the drum
11
, the cleaning blade
14
, the charge roller
12
, and the like are detached from the frame
13
, and the development roller
18
, the development blade
16
, unshown magnetic seals, and the like are detached from the developing means holding frame
17
.
After the detachment of various components, for example, the drum
11
, the development roller
18
, the charge roller
12
, the cleaning blade
14
, the development blade
26
, and the like, they are cleaned, and examined for their recyclability. The nonrecyclables are put aside for material recycling. Then, the recyclables are reattached to the corresponding frames, along with new replacement components for the nonrecyclables. More specifically, the drum
11
, the charge roller
12
, the cleaning blade
14
, and the like are reattached to the frame
13
, and the development roller
18
and the development blade
16
are reattached to the frame
17
. Then, the parallel pin
60
is put through the hole
17
d
of the frame
17
and the hole of the cleaning means holding frame
13
. As for the sealing member
21
, it is peeled away from the frames
17
, and the hole
16
c
of the container
16
, through which toner is sent to the developing means holding frame
17
, is resealed with a toner seal. Next, the toner cap
16
g
is removed, and toner is refilled into the container
16
through the toner inlet
16
f
, with the use of a funnel
28
, as shown in FIG.
21
. Then, the sealing member
21
is pasted to the edges of the aforementioned holes
16
c
and
17
a.
(Assembly Method)
After being separated and overhauled as described above, the frame and cover portions of the cartridge
15
are reassembled in the following manner. First, the portion of the cover
19
(
20
) separated from the main section of the cartridge
15
is approximately aligned with the portion of the cover
19
(
20
) remaining connected to the main section of the cartridge
15
, and the fastening member
102
is inserted into the single-piece positioning member
101
, completing the cartridge
15
.
FIG. 15
shows the cartridge
15
after this temporary reassembly. A part of the cover
19
(
20
) was eliminated by the cutting during the disassembly. Thus, the insertion of the fastening member
102
into the single-piece positioning member
101
leaves a gap g which corresponds in size to the portion of the cover
19
(
20
) eliminated by the cutting. However, the separated portion of the cover
19
(
20
) is precisely positioned relative to the main section of the cartridge
15
in all of the X, Y, and Z directions in the drawing, because the plurality of single-piece positioning members
101
were attached to the cover
19
(
20
) prior to the cutting; more specifically, the position of each single-piece positioning member was precisely fixed relative to the cover
19
(
20
) before the cutting, and a positioning member and a fastening member were fabricated so that they matched to each other in both configuration and measurements. This assembly method can also be used for reassembling a process cartridge which is obtained by overhauling a used process cartridge using the above described disassembling and reassembling methods.
(Embodiment 4)
FIG. 16
shows a two-piece positioning member
103
used in the fourth embodiment of the present invention. This two-piece positioning member
103
also comprises a pair of receptacle portions
103
a
. Unlike the single-piece positioning member
101
in the third embodiment, the receptacle portions
103
a
of this two-piece positioning member
103
are not directly connected to each other. However, this two-piece positioning member
103
is identical in function to the single-piece positioning member
101
in the third embodiment. Therefore, reference to the description of the single-piece positioning member
101
in the third embodiment suffices as the description of the two-piece positioning member
103
in this embodiment. The fastening members used in this embodiment are identical to the fastening member
102
shown in
FIGS. 11 and 12
.
(Disassembly Method)
In this embodiment, each two-piece positioning member
103
is attached to the cover
19
(
20
) of the cartridge
15
after it is engaged with a fastening member
102
. Then, the fastening member
102
is removed before the cutting of the cover
19
(
20
), across the portion between the receptacle portions
103
a
and
103
a.
Compared to the third embodiment, the disassembly method in this embodiment requires additional steps: a step to engage each two-piece positioning member with a fastening member
102
before its attachment, and a step to remove the fastening member
102
from each two-piece positioning member
103
before the cutting of the covers. However, the disassembly method in this embodiment does not require the cutting of the connective portion, and therefore, is simpler in terms of the cutting operation. The assembly method in this embodiment is identical to that in the third embodiment, and therefore, its description will be omitted here.
(Embodiment 5)
Next, referring to
FIGS. 18
to
20
, the fifth embodiment of the present invention will be described.
FIG. 18
is an exploded perspective view of a positioning/fastening member and a side cover
105
, for depicting the cartridge remanufacturing method in this embodiment. In the case of this cartridge
104
, the side cover
105
is attached to the main portion
106
of the cartridge
104
comprising the frame
13
, the container
16
, and the like, with the use of a joint or connective portion
107
. In
FIG. 18
, the cartridge
104
is unshown except for the portion
106
and connective portion
107
. The connective portion
107
is attached by the aforementioned melted resin, ultrasonic welding, or the like. The side cover
105
is simpler in configuration than those in the first to fourth embodiments. The positioning/fastening apparatus
108
comprises a positioning member
109
and a fastening member
110
, and will be described later in detail. A pin
111
is for securing the positioning member
109
and fastening member
110
relative to each other.
FIG. 19
shows the positioning member
109
. The internal surface
109
a
of the positioning member
109
matches in shape with the external surface
105
b
of the cover
105
. The positioning member
109
comprises a pair of positioning portions
109
b
and a connective portion
109
c
which connects the pair of positioning portions
109
b
. The details of the positioning member
109
will be given later. The positioning member
109
also comprises a pair of flange portions
109
d
located at the outward lips of the positioning portions
109
b
, one for one, and a plurality of holes
109
e
, into each of which the pin
111
is inserted for the securing the positioning member and fastening member to each other.
FIG. 20
shows the fastening member
110
. The internal surface
110
a
is matched in configuration and size to the external surface of each of the positioning portions
109
b
. The width of the fastening member
110
is virtually equal to the distance between the two flange portions, more specifically, between the mutually facing surfaces of the two flange portions
109
d
. To each of the plurality of holes
110
e
of the fastening member
110
, the wall of which is stepped, the pins
111
is inserted. The lip portion of each hole
110
e
is chamfered (surface
110
f
).
(Disassembly Method)
First, the positioning member
109
is fitted around the cover
105
by moving the positioning member
109
in the direction indicated by an arrow mark B as shown in
FIG. 18
, until the inward end surface of the flange portion
109
d
, with reference to the cartridge, comes into contact with the joint portion
107
of the cartridge. As for the securing method, a semipermanent means such as gluing is used. Thereafter, the positioning member
109
is cut, together with the cover
105
, in the direction perpendicular to the lengthwise direction of the cartridge, across a predetermined portion of the connective portion
109
c
, by moving such a tool as an ultrasonic cutter, a circular saw, or the like, in a manner to follow the circumference of the cartridge. As a result, the cover
105
is cut into two pieces.
(Assembly Method)
Around the positioning portion
109
b
of the positioning member
109
on one of the two cover pieces created by the cutting (which here is assumed to be the piece remaining attached to the joint portion
107
), the fastening member
110
is fitted. Then, the fastening member
110
is moved toward the flange portion
109
d
of the positioning member
109
until its inwardly facing end surface of the fastening member
110
, with respect to the cartridge, comes into contact with the outwardly facing end surface of the flange
109
d
, with respect to the cartridge.
Next, the positioning portion
109
b
of the positioning member
109
on the cover
105
piece separated from the main section of the cartridge is inserted into the fastening member
110
, deeply enough for the inwardly facing end surface, with respect to the cartridge, of the flange portion
109
d
of the positioning member
109
to come into contact with the outwardly facing end surface of the fastening member
110
. Next, the plurality of pins
111
are put through the holes
110
e
of the fastening member
110
, and the holes
109
e
of the positioning member
109
, one for one, and are secured thereto.
As described above, according to this embodiment, the positioning member
109
is attached to the cover
105
before the cutting of the cover
105
. Therefore, the portion of the cover
105
separated from the main section of the cartridge can be reattached to the main section, precisely in alignment with the main section in all of the X, Y, and Z directions in the drawing, since the position of the positioning member
109
is fixed relative to the side cover
105
before the cutting of the side cover
105
, and the positioning member
109
and fastening member
110
are matched to each other in configuration and measurements. Incidentally, this reassembly method can also be used for reassembling a process cartridge which is obtained by overhauling a used process cartridge using this disassembling and reassembling methods.
As described above, according to this embodiment, a positioning member is attached to a part of a cartridge before cutting the cartridge. Then, the portion of the cartridge separated from the main section of the cartridge is reattached to the main section with the use of a fastening member, which matches in configuration and measurements the positioning member. With this arrangement, the separated portion of the cartridge can be reattached to the main section of the cartridge as precisely in alignment with the main section as it was before the cutting, making it possible to remanufacture a cartridge at the same level of accuracy as that at which it was manufactured. Also with this arrangement, the number of the recyclable components is increased, contributing to the efficient usage of natural resources as well as environmental protection.
The above described embodiments of the present invention include a process cartridge remanufacturing method which involves simultaneously a substantial number of process cartridges with an expired service life, as well as a process cartridge remanufacturing method which involves a single process cartridge with an expired service life. In the case of the former, a substantial number of expired process cartridges are recovered, and disassembled. Then, the components removed from the disassembled process cartridges are sorted into groups of the identical components. Then, as large as possible a number of process cartridges are reassembled from the groups of sorted recyclable components, and some new replacement components for the nonrecyclable old components. In the case of the latter, the expired process cartridges are remanufactured one by one. In other words, each time an expired process cartridge is recovered, it is disassembled, and reassembled using the same old components removed therefrom, some new replacement components for the nonrecyclable old components, or some old recyclable components removed from the other recovered cartridges.
The present invention includes any of the following cases:
(1) each expired process cartridge is overhauled using only the components therein;
(2) each expired process cartridge is overhauled using, in principle, the components therein, with the exception of the new replacement components, or the recyclable old components from the other expired cartridge, which replace the original components that are nonrecyclable due to service life expiration, damages, malfunctions, or the like;
(3) a plurality of expired process cartridges are overhauled together; the components removed from the plurality of expired process cartridges are sorted into groups of the identical components, and as large as possible a number of process cartridges are reassembled using only the components from the groups of the original components; and
(4) a plurality of expired process cartridges are overhauled together; the components removed from the plurality of expired process cartridges are sorted into groups of the identical components, and as large as possible a number of process cartridges are reassembled using, in principle, the components from the groups of the original components, except for a certain number of new replacement components which replace the original components nonrecyclable due to service life expiration, or the like.
The aforementioned components are the structural components disclosed in the claim portion of this specification, that is, the components which make up the above described portions of the process cartridge. It also includes the smallest components or units, into which the process cartridge can be disassembled.
As described above, the present invention is a realization of a simple process cartridge remanufacturing method regarding the assembly and disassembly of a process cartridge. The positioning/joining apparatus in accordance with the present invention is very effective when used during the process cartridge reassembly.
While the invention has been described with reference to the structures disclosed herein, it is not confined to the details set forth, and this application is intended to cover such modifications or changes as may come within the purposes of the improvements or the scope of the following claims.
Claims
- 1. A disassembling method for a process cartridge detachably mountable to a main assembly of an electrophotographic image forming apparatus, wherein the process cartridge includes an electrophotographic photosensitive drum, a developing roller for developing an electrostatic latent image formed on the electrophotographic photosensitive drum, a drum supporting frame configured and positioned to rotatably support the electrophotographic photosensitive drum, a developer accommodating container configured to accommodate a developer to be supplied to the developing rollers, a developing device frame configured and positioned to support the developing roller, and covering members connected to the drum supporting frame and the developer accommodating container at ends of the drum supporting frame and the developer accommodating container with respect to a longitudinal direction of the electrophotographic photosensitive drum, said disassembling method comprising:a step of cutting said covering members adjacent to a connecting portion between the covering members and the drum supporting frame and a connecting portion between the covering members and the developer accommodating container along an outer wall of the covering members, wherein the developing device frame of the process cartridge supports the developing roller, and the developing device frame has an arm portion projected toward the drum supporting frame at one longitudinal end of the developing roller and is rotatably connected to the drum supporting frame by a pin member adjacent to a free end portion of the arm portion; and a step of removing the pin member after said covering members cutting step.
- 2. A method according to claim 1, wherein the process cartridge further includes an exposure opening extending in the longitudinal direction of the electrophotographic photosensitive drum to permit light from exposure means provided in the main assembly of the electrophotographic image forming apparatus to be incident on the electrophotographic photosensitive drum,said method further comprising: a step of cutting a portion between one longitudinal end portion of the exposure opening and a cutting portion cut in said step of cutting the covering members which is adjacent one longitudinal end portion of one of the covering members.
- 3. A method according to claim 1 or 2, wherein said process cartridge further includes an image transfer opening configured and positioned to transfer onto a recording material a visualized image provided by the developing roller from an electrostatic latent image on the electrophotographic photosensitive drum, said method further comprising:a step of cutting a portion between one longitudinal end portion of the image transfer opening and a cutting portion cut in said step of cutting the covering members which is adjacent one longitudinal end portion of one of the covering members.
- 4. A method according to claim 1, wherein the process cartridge further includes a drive transmission member which is provided at a longitudinally outside part of the drum supporting frame, the developer accommodating container, or the developing device frame and which is covered by one of the covering members, said method further comprising:a step of removing the drive transmission member after said covering members cutting step.
- 5. A disassembling method for a process cartridge detachably mountable to a main assembly of an electrophotographic image forming apparatus, wherein the process cartridge includes an electrophotographic photosensitive drum, a drum supporting frame configured and positioned to rotatably support a developing roller for developing an electrostatic latent image formed on the electrophotographic photosensitive drum and the electrophotographic photosensitive drum, an exposure opening extending in the longitudinal direction of the electrophotographic photosensitive drum to permit light from exposure means provided in the main assembly of the electrophotographic image forming apparatus to be incident on the electrophotographic photosensitive drum, a developer accommodating container configured to accommodate a developer to be supplied to the developing roller, a developing device frame configured and positioned to support the developing roller, and covering members connected to the drum supporting frame and the developer accommodating container at ends of the drum supporting frame and the developer accommodating container with respect to a longitudinal direction of the electrophotographic photosensitive drum, an image transfer opening configured and positioned to transfer onto a recording material a visualized image provided by the developing roller from an electrostatic latent image on the electrophotographic photosensitive drum, said disassembling method comprising:a step of cutting a portion of the process cartridge between one longitudinal end portion of the exposure opening and one longitudinal end portion of the image transfer opening adjacent the one longitudinal end portion of the exposure opening, along an outer wall of the process cartridge.
- 6. A method according to claim 5, wherein the exposure opening is provided on the drum supporting frame, and the image transfer opening is defined along a longitudinal direction of the electrophotographic photosensitive drum between the drum supporting frame and the developing device frame when one of the covering members is connected to the drum supporting frame and the developer accommodating container, said method further comprising,a step of cutting the drum supporting frame and one of the covering members along an outer wall of the process cartridge.
- 7. A method according to claim 5 or 6, further comprising a step of cutting a portion between the other longitudinal end portion of the exposure opening and the other longitudinal end portion of the image transfer opening along an outer wall of the process cartridge.
- 8. A method according to claim 5 or 6, wherein the developing device frame of the process cartridge supports the developing roller and the developing device frame has an arm portion projected toward the drum supporting frame at one longitudinal end of the developing roller and is rotatably connected to the drum supporting frame by a pin member adjacent to a free end portion of the arm portion, said method further comprising:a step of cutting a portion of the process cartridge corresponding to a center of rotation of one of the covering members to provide an opening, accessing the pin member through the thus provided opening, and removing the pin member.
- 9. A process cartridge remanufacturing method for remanufacturing a process cartridge which is detachably mountable to a main assembly of an electrophotographic image forming apparatus and which includes an electrophotographic photosensitive drum, process means actable on the electrophotographic photosensitive drum and a frame configured and positioned to cover the electrophotographic photosensitive drum and the process means, said method comprising:(a) a step of mounting at least one pair of positioning members on the frame; (b) a step of cutting a portion of the process cartridge between the one pair of positioning members into divided parts; and (c) a step of connecting the divided parts by a connecting member while the parts are positioned with respect to the pair of positioning members.
- 10. A process cartridge remanufacturing method according to claim 9, wherein the pair of positioning members is formed into an integrated member by a connecting portion, and is cut in said cutting step.
- 11. A process cartridge remanufacturing method according to claim 10, wherein the pair of positioning members and a coupling member are disconnectably connected.
- 12. A process cartridge remanufacturing method according to claim 11, wherein the pair of positioning members is mounted to the frame with the pair of positioning members being connected with the coupling member, and thereafter, the coupling member is removed, and then the frame is cut.
- 13. A process cartridge disassemblying method for remanufacturing a process cartridge which is detachably mountable to a main assembly of an electrophotographic image forming apparatus and which includes an electrophotographic photosensitive drum, process means actable on the electrophotographic photosensitive drum and a frame covering the electrophotographic photosensitive drum and the process means, said method comprising:(a) a step of mounting at least one pair of positioning members on the frame; (b) a step of cutting a portion of the process cartridge between the pair of positioning members into divided parts; and (c) a step of connecting the divided parts by a connecting member while the parts are positioned with respect to the pair of positioning members.
- 14. A method according to claim 13, wherein the pair of positioning members is connected into an integral part and is cut by said cutting step.
- 15. A method according to claim 13 or 14, wherein the pair of positioning members and a coupling member can be disconnectably connected to each other.
- 16. A method according to claim 15, wherein the pair of positioning members are mounted to the frame with the pair of positioning members being connected with the coupling member, and thereafter, the coupling member is removed, and then the frame is cut.
- 17. An assembling method for a process cartridge which is detachably mountable to a main assembly of an electrophotographic image forming apparatus and which includes an electrophotographic photosensitive drum, process means actable on the electrophotographic photosensitive drum and a frame covering the electrophotographic photosensitive drum and the process means, said method comprising:(a) a step of preparing a process cartridge which has been divided into parts by mounting at least one pair of positioning members on the frame and cutting the process cartridge at a portion thereof between the positioning members constituting the pair; and (b) a step of connecting the divided parts by a connecting member while the parts are positioned with respect to the pair of positioning members.
- 18. An assembling method for a process cartridge according to claim 17 wherein the pair of positioning members and the connecting member can be disconnectably connected to each other.
- 19. A positioning and connection apparatus for connecting frames provided by cutting a process cartridge which is detachably mountable to a main assembly of an electrophotographic image forming apparatus and which includes an electrophotographic photosensitive drum, process means actable on the electrophotographic photosensitive drum and a frame covering the process means, said apparatus comprising:a pair of positioning members mounted on the frame prior to cutting the frame; a coupling member mounted to said pair of positioning members to connect said cut frame; and positioning means for determining the relative position between said pair of positioning members and said coupling member.
- 20. An apparatus according to claim 19, wherein said pair of positioning members is connected into an integral part and is cuttable in a cutting step.
- 21. An apparatus according to claim 19, wherein said pair of positioning members and said coupling member can be disconnectably connected to each other.
- 22. A process cartridge detachably mountable to a main assembly of an electrophotographic image forming apparatus, said process cartridge comprising:an electrophotographic photosensitive drum; process means actable on said electrophotographic photosensitive drum; a frame configured and positioned to cover said process means, a first frame portion of said frame; a second frame portion of said frame; and at least one pair of positioning members, wherein one of said positioning members is mounted to said first frame portion, and another one of said positioning members is mounted to said second frame portion; wherein said first frame portion and said second frame portion are connected to each other by said at least one pair of positioning members extending between said first frame portion and said second frame portion and a coupling member connecting said positioning members constituting the pair, with each other.
- 23. A process cartridge according to claim 22, wherein said pair of positioning members and the coupling member are removably connected.
Priority Claims (1)
Number |
Date |
Country |
Kind |
2001/132619 |
Apr 2001 |
JP |
|
US Referenced Citations (24)
Foreign Referenced Citations (3)
Number |
Date |
Country |
9-62167 |
Mar 1997 |
JP |
2000-263550 |
Sep 2000 |
JP |
2001-34143 |
Feb 2001 |
JP |