Information
-
Patent Grant
-
6536867
-
Patent Number
6,536,867
-
Date Filed
Monday, August 23, 199925 years ago
-
Date Issued
Tuesday, March 25, 200321 years ago
-
Inventors
-
Original Assignees
-
Examiners
Agents
-
CPC
-
US Classifications
Field of Search
-
International Classifications
-
Abstract
A maintenance unit for use in an ink jet printer includes a maintenance frame coupled to a printer frame, a maintenance sled moveably coupled to the maintenance frame and a spreader mechanism coupled to the maintenance sled, wherein the spreader mechanism disperses waste ink over a waste ink accumulation region as the maintenance sled moves relative to the maintenance frame.
Description
TECHNICAL FIELD OF INVENTION
The present invention is directed generally to the handling of waste ink accumulated in an ink jet printer system, and more particularly, to an apparatus and method for increasing the effective capacity for storing waste ink in a maintenance station without increasing the physical capacity of the waste ink collection reservoir.
BACKGROUND OF THE INVENTION
Ink jet printers require maintenance operations to keep the nozzles of the print cartridge operating properly. Such maintenance operations typically include a combination of wiping the nozzle area of the print cartridge, firing the nozzles at prescribed intervals (spitting), and capping the cartridge during idle periods to prevent the jetted ink which remains on the nozzle plate from drying and clogging one or more of the nozzles of the nozzle plate. Typically, the spitting operation occurs at a location in the maintenance station. Over a period of time, the solids in the waste ink accumulate in the maintenance station, and the resulting waste ink build-up can affect the operation of the maintenance assembly.
Various attempts have been made to handle and transfer waste ink in an ink jet system. One such attempt is directed to an apparatus having a pump mechanism for carrying waste ink from the pump to a carrying member. Waste ink is supplied to the pump by a series of ink-absorbing materials which, by capillary action, transfer the waste ink to the pump. During operation, a print head wiper slides in contact with a wipe-over portion of an ink-absorbing member carried by an ink-absorbing spring at a predetermined position on the chassis, whereby ink, water droplets, and contaminants adhering to the wiper are imparted to the ink-absorbing member. The ink or water droplets adhering to the ink-absorbing members transfer from one member to another by capillary action, and ultimately to the pump mechanism for carrying waste ink from the pump to a waste ink carrying member.
Early ink jet printers used dye-based inks, which were mostly volatile liquids, and the maintenance operations required little capacity for waste ink generated from the spitting operation due to evaporation of the volatile liquid component of the ink and the relatively small quantity of solids in the ink. More recent products, however, have incorporated pigment-based inks that have a larger percentage of solids in them. After the volatile components evaporate, a sludge of mostly solid material is left behind. This solid material builds up in or below the maintenance assembly, and over time, storage capacity must be provided for the solid buildup in order for the maintenance station of the printer to operate properly. To address this increase in capacity, one method would be to increase the size of the waste ink collection reservoir for collecting the waste ink. Such an increase in capacity for collecting waste ink, however, would result in increased size of the printer and/or increased cost relating to the increased capacity for the waste ink collection reservoir.
Accordingly, a need exists for a printing system which includes a maintenance station which has the ability to effectively increase the amount of waste ink which can be collected without physically increasing the size of the waste ink collection reservoir.
SUMMARY OF THE INVENTION
The present invention is directed to apparatus and method for effectively increasing the waste ink capacity of an ink printing device, such as an ink jet printer, without the necessity of increasing the size of the waste ink collection reservoir of the ink printing device. The apparatus includes a spreader mechanism coupled to a drive mechanism of the ink printing device, wherein the spreader mechanism is driven by the drive mechanism to engage and disperse waste ink over a waste ink accumulation region.
In one embodiment of the invention, a maintenance unit is disclosed for use in an ink jet printer, wherein the ink jet printer includes a printer frame having a waste ink accumulation region. The maintenance unit includes a maintenance frame coupled to the printer frame, a maintenance sled moveably coupled to the maintenance frame, and a spreader mechanism coupled to the maintenance sled. The spreader mechanism disperses waste ink over the waste ink accumulation region as the maintenance sled moves relative to the maintenance frame.
Preferably, the spreader mechanism includes an elongate portion and a drive pin extending from the elongate portion, and the maintenance sled includes an aperture for receiving the drive pin of the spreader mechanism. In addition, the printer frame includes a pivot pin and the spreader mechanism rotates about the pivot pin due to a movement of the maintenance sled relative to the maintenance frame to disperse waste ink over the waste ink accumulation region.
Other features and advantages of the invention may be determined from the drawings and the detailed description of the invention that follows. Corresponding reference characters indicate corresponding elements throughout the several figures.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1
is a partial, perspective view of the frame assembly of an ink jet printer including a maintenance assembly in accordance with the invention;
FIG. 2
is a detailed, perspective view of the maintenance assembly of
FIG. 1
;
FIG. 3
is a partial, perspective view of the frame assembly of
FIG. 1
with the maintenance frame and maintenance sled removed to expose the spreader mechanism; and
FIG. 4
is a partial, sectional view of the printer frame assembly and maintenance assembly of
FIG. 1
along line
4
—
4
in FIG.
1
.
DETAILED DESCRIPTION OF PREFERRED EMBODIMENTS
FIG. 1
shows a portion of an ink jet printer
10
which includes a printer frame
12
, a printhead carrier assembly
14
, and a maintenance assembly
16
in accordance with the present invention. Positional terms such as left, right, top, bottom, upper, lower, clockwise or counter-clockwise are assigned based on the orientation of printer
10
in FIG.
1
and should not be considered limiting terminology.
Printer frame
12
includes a bottom frame member
18
, two side frame members
20
a
,
20
b
, a rear frame member
21
, and a top frame member
22
. Side frame members
20
a
,
20
b
are attached to, and extend generally vertically upwardly from, opposing ends
23
a
,
23
b
of bottom frame member
18
. An upper portion of each of the side frame members
20
a
,
20
b
includes a slot
24
which is adapted to accept a tab
25
of top frame member
22
to mount and position top frame member
22
generally parallel to bottom frame member
18
. Rear frame member
21
is disposed between side frame members
20
a
,
20
b
, generally above bottom frame member
18
and below top frame member
22
. An upper surface
26
of bottom frame member
18
includes a waste ink accumulation region
28
.
Top frame member
22
includes a horizontally extending guide portion
30
and a vertically upwardly extending guide rail
32
disposed at the rear side of guide portion
30
. Guide rail
32
is adapted to slideably receive printhead carrier assembly
14
and permit reciprocating movement of printhead carrier assembly
14
in relation to guide rail
32
in the directions depicted by arrows
34
.
Printhead carrier assembly
14
includes a carriage
35
which holds two print cartridges
36
a
,
36
b
, wherein print cartridge
36
a
contains a magenta, yellow and cyan colored pigment based inks and print cartridge
36
b
contains a black dye based ink. In general, pigment based inks contain more solid components than dye based inks.
Each of print cartridges
36
a
,
36
b
includes an ink reservoir
38
a
,
38
b
and a printhead
40
a
,
40
b
, respectively. Each of printheads
40
a
,
40
b
includes a nozzle plate (not shown) containing a plurality of nozzle openings (not shown) for selectively ejecting ink from the corresponding ink reservoirs
38
a
,
38
b
. Although ink reservoirs
38
a
,
38
b
and printheads
40
a
,
40
b
, respectively, are shown as forming an integral unit, i.e., print cartridges
36
a
,
36
b
, those skilled in the art will recognize that the reservoir may be mounted remotely from the printhead and connected to the printhead via a conduit. In such a configuration, printhead carrier assembly
14
would not need to carry the ink reservoir.
The reciprocating movement of printhead carrier assembly
14
along guide rail
32
is effected by a drive means (not shown) of a type known in the art, such as a belt coupled to a stepper motor. The movement of printhead carrier assembly
14
and the ejection of ink by print cartridges
36
a
,
36
b
are controlled by a microprocessor control means, types of which are known in the art. During operation, printhead carrier assembly
14
is moved by the drive means to position printheads
40
a
,
40
b
at various locations within the predetermined limits of permitted travel of printhead carrier assembly
14
. Included in the limited travel of printhead carrier assembly
14
is a printing zone
42
, and a maintenance zone
44
defined by a maintenance start position
46
and a capping region
48
.
Printing operations occur in a conventional manner that is well understood in the art. A sheet of print media, such as paper, is carried under printheads
40
a
,
40
b
, but above bottom frame member
18
. The sheet is carried by a series of rollers (not shown) in the direction shown by arrow
33
. The sheet typically has a constant separation from printheads
40
a
,
40
b
. As the sheet is being carried, printheads
40
a
,
40
b
reciprocally traverse printing zone
42
. Under the control and at locations selected by a microprocessor control means, print cartridges
36
a
,
36
b
selectively eject ink from the respective nozzles of printheads
40
a
,
40
b
onto the sheet.
During a maintenance operation, printheads
40
a
,
40
b
are moved into maintenance zone
44
to have a maintenance cycle performed. Two types of maintenance cycles are possible: a printing maintenance cycle and a printhead storage maintenance cycle. Both types of maintenance cycles, i.e., the printing maintenance cycle and the printhead storage maintenance cycle, are effected by maintenance assembly
16
.
Maintenance assembly
16
is attached to printer frame
12
above waste ink accumulation region
28
of bottom frame member
18
. Maintenance assembly
16
includes a maintenance frame
50
, a maintenance sled
52
and a spreader mechanism
54
. Preferably, maintenance assembly
16
is located such that a left end
56
of maintenance sled
52
generally defines maintenance start position
46
for printhead carrier assembly
14
.
Referring to
FIGS. 1-2
, maintenance frame
50
is a generally rectangular structure formed by vertical guide members
58
a
,
58
b
,
58
c
, and
58
d
. Vertical guide member
58
a
includes two ramped surfaces
60
a
,
60
b
, and vertical guide member
58
b
includes two ramped surfaces
60
c
,
60
d
. Ramped surfaces
60
a
,
60
b
,
60
c
,
60
d
provide vertical support for maintenance sled
52
. Each of ramped surfaces
60
a
,
60
b
,
60
c
,
60
d
is upwardly inclined towards vertical member
58
c
and each contains three distinct elevations: a printing elevation
62
; a wiping elevation
64
; and capping elevation
66
.
Maintenance frame
50
further includes a print latch
67
pivotally coupled at the intersection of vertical guide members
58
b
,
58
d
. Print latch
67
contains a stop surface
67
a
and a spring (not shown). Print latch
67
functions to actively control the placement of maintenance sled
52
along ramped surfaces
60
a
,
60
b
,
60
c
,
60
d
. When print latch
67
is in the open position, sled
52
is allowed to travel along ramped surfaces
60
a
,
60
b
,
60
c
,
60
d
to printing elevation
62
. When print latch
67
is in the closed position, sled
52
is prohibited from traveling along ramped surfaces
60
a
,
60
b
,
60
c
,
60
d
to printing elevation
62
. The spring biases print latch
67
towards the closed position. The structure and operation of print latch
67
is well known in the art.
Maintenance sled
52
is disposed within the open interior of maintenance frame
50
, as shown in FIG.
2
. Maintenance sled
52
has four generally vertical members
68
a
,
68
b
,
68
c
and
68
d
which form a rectangular structure. Maintenance sled
52
further includes a bottom horizontal member
70
, and four dowel members
72
a
,
72
b
,
72
c
and
72
d
. Dowel members
72
a
,
72
b
extend horizontally, outward from vertical member
68
a
and dowel members
72
c
,
72
d
extend horizontally, outward from vertical member
68
b
. Dowel members
72
a
,
72
b
,
72
c
,
72
d
are supported by the corresponding ramped surfaces
60
a
,
60
b
,
60
c
,
60
d
on maintenance frame
50
and are guided along ramped surfaces
60
a
,
60
b
,
60
c
,
60
d
to raise or lower maintenance sled
52
relative to maintenance frame
50
.
Maintenance sled
52
includes wiper assemblies
74
a
,
74
b
; discharge cavities
75
a
,
75
b
; and cap assemblies
76
a
,
76
b
. Each wiper assembly
74
a
,
74
b
contains a support structure
77
a
,
77
b
fixably attached to bottom member
70
of maintenance sled
52
and a wiper
78
a
,
78
b
made of an elastomeric material such as Texin 480-A (Miles, Inc.) secured to support structure
77
a
,
77
b
. Wiper assemblies
74
a
,
74
b
remove excess ink from the exterior of the nozzles on printheads
40
a
,
40
b
, respectively.
Discharge cavities
75
a
,
75
b
, are positioned to the right of wiper assemblies
74
a
,
74
b
, respectively. Discharge cavities
75
a
,
75
b
are defined by vertical members
68
a
,
68
b
and by cross-vertical members
69
a
,
69
b
, and
69
c
,
69
d
, respectively.
Cap assemblies
76
a
,
76
b
are positioned to the right of discharge cavities
75
a
,
75
b
. Cap assemblies
76
a
,
76
b
include printhead caps
80
a
,
80
b.
Maintenance sled
52
further includes a capping tab
83
which extends vertically upward from vertical member
68
c
. Capping tab
83
facilitates the movement of sled
52
to wiping elevation
64
or to capping elevation
66
of ramped surfaces
60
a
,
60
b
,
60
c
,
60
d
when contacted by print cartridge
36
a.
FIG. 3
shows the arrangement of
FIG. 1
with maintenance sled
52
and maintenance frame
50
removed to expose spreader mechanism
54
, which is disposed directly above waste ink accumulation region
28
of bottom frame member
18
and directly below maintenance sled
52
(see FIG.
1
).
Referring to
FIGS. 3 and 4
, spreader mechanism
54
includes a elongate portion
88
, a blade portion
89
, a vertical aperture
90
, a drive pin
92
, an upward-facing surface
94
, a downward-facing surface
96
, and a perimetrical surface
98
. As shown in
FIG. 3
, blade portion
89
extends from and is coplanar with elongate portion
88
, and defines a blade surface
100
, which is formed from a portion of the perimetrical surface
98
.
Vertical aperture
90
extends through a first end region
102
of elongate portion
88
, and is sized to slideably receive a pivot pin
104
of bottom frame member
18
. Pivot pin
104
and vertical aperture
90
cooperate to permit rotation of spreader mechanism
54
relative to bottom frame member
18
to spread ink residue accumulated in waste ink accumulation region
28
. Pivot pin
104
can be made of plastic and heat staked to secure spreader mechanism
54
to bottom frame member
18
.
Drive pin
92
facilitates the rotation of spreader mechanism
54
to coincide with the movement of sled
52
. Drive pin
92
extends vertically upward from upward-facing surface
94
of elongate portion
88
and is received in a drive aperture
106
in maintenance sled
52
, as shown in FIG.
4
.
As maintenance sled
52
moves from left to right, spreader mechanism
54
rotates clockwise, thereby spreading the accumulated ink generally to the right of blade surface
100
of elongate portion
88
and blade portion
89
. A right to left movement of maintenance sled
52
causes spreader mechanism
54
to rotate counter-clockwise to spread the accumulated ink generally to the left of elongate portion
88
.
The operation of the spreader mechanism
54
will now be discussed in relation to the maintenance cycles, i.e., the printing maintenance cycle and printhead storage maintenance cycle, and will be discussed with reference to
FIGS. 1-4
.
In a printing maintenance cycle, printhead carrier assembly
14
moves to the right along guide rail
32
to maintenance region
44
. Printhead carrier assembly
14
passes maintenance start position
46
and as printhead carrier assembly
14
moves farther to the right, the rightward leading print cartridge
36
a
contacts capping tab
83
of maintenance sled
52
. This contact causes maintenance sled
52
to move to the right with the printhead carrier assembly
14
. The rightward movement causes print latch
67
to momentarily reside in the open position thereby releasing sled
52
from printing elevation
62
. The rightward movement raises maintenance sled
52
to wiping elevation
64
because dowel members
72
a
,
72
b
,
72
c
,
72
d
of maintenance sled
52
are guided along ramped surfaces
60
a
,
60
b
,
60
c
,
60
d
. In addition, the rightward movement of maintenance sled
52
causes spreader mechanism
54
to rotate clockwise about pivot pin
104
in conjunction with the generally lateral movement of maintenance sled
52
. During the clockwise rotation of spreader mechanism
54
, blade surface
100
engages and disperses, or spreads, the accumulated ejected ink and any solid components in waste ink accumulation region
28
.
Once sled
52
reaches wiping elevation
64
, print latch
67
resumes the closed position thereby impeding sled
52
from traveling back down ramped surfaces
60
a
,
60
b
,
60
c
,
60
d
to printing elevation
62
due to stop surface
67
a
on print latch
67
. After print latch
67
resumes the closed position, printhead carrier assembly
14
begins to travel back to the left towards printing zone
42
. As print cartridges
36
a
,
36
b
pass over discharge cavities
75
a
,
75
b
, respectively, ink is ejected from the nozzles in printheads
40
a
,
40
b
. The ejected ink falls through discharge cavities
75
a
,
75
b
and accumulates in waste ink accumulation region
28
. As printhead carrier assembly
14
moves father to the left, the nozzles of printheads
40
a
,
40
b
are wiped by wipers
78
a
,
78
b
to remove excess ink from the nozzles and a portion of the leftward leading print cartridge
36
b
contacts print latch
67
causing print latch
67
to assume the open position. Once print latch
67
is in the open position, dowel members
72
a
,
72
b
,
72
c
,
72
d
of maintenance sled
52
migrate down ramped surfaces
60
a
,
60
b
,
60
c
,
60
d
from wiping elevation
64
to printing elevation
62
due to gravity. After printhead carrier assembly
14
has completely entered printing zone
42
, print latch
67
resumes the closed position due to the spring bias of print latch
67
.
During the leftward movement of maintenance sled
52
, spreader mechanism
54
is caused to rotate counter-clockwise about pivot pin
104
in conjunction with the generally lateral movement of maintenance sled
52
. During the counter-clockwise rotation of spreader mechanism
54
, perimetrical surface
98
of spreader mechanism
54
further engages and disperses the accumulated ejected ink and any solid components in waste ink accumulation region
28
.
The printhead storage maintenance cycle is generally analogous to the printing maintenance cycle, except that printhead carrier assembly
14
does not stop its rightward motion when maintenance sled
52
is at wiping elevation
64
. Instead, printhead carrier assembly
14
continues to move to the right, thereby further moving maintenance sled
52
to the right until dowels
72
a
,
72
b
,
72
c
,
72
d
of sled
52
are at capping elevation
66
of ramp surfaces
60
a
,
60
b
,
60
c
,
60
d
. When maintenance sled
52
is at capping elevation
66
(defined as being in capping region
48
), caps
80
a
,
80
b
, respectively form an air seal around the nozzles on printheads
40
a
,
40
b
to prevent the ink on the nozzles from drying. Printhead carrier assembly
14
can stay at capping region
48
for an indefinite amount of time.
The rightward movement of maintenance sled
52
causes spreader mechanism
54
to rotate clockwise about pivot pin
104
in conjunction with the generally lateral movement of maintenance sled
52
. During the clockwise rotation of spreader mechanism
54
, blade surface
100
engages and disperses the accumulated ejected ink and any solid components in waste ink accumulation region
28
.
Once printhead carrier assembly
14
begins to move to the left toward printing zone
42
, maintenance sled
52
migrates down ramp surfaces
60
a
,
60
b
,
60
c
60
d
from capping elevation
66
to wiping elevation
64
thereby disengaging caps
80
a
,
80
b
from the respective printheads
40
a
,
40
b
. As stated earlier printheads
40
a
,
40
b
eject, or spit, ink from the nozzles through discharge cavities
75
a
,
75
b
and are wiped by wipers
78
a
,
78
b
as printhead carrier assembly
14
moves to the left. Maintenance sled
52
stays at wiping elevation
64
until the leftward leading print cartridge
36
b
on printhead carrier assembly
14
engages print latch
67
.
During the leftward movement of maintenance sled
52
, spreader mechanism
54
is caused to rotate counter-clockwise about pivot pin
104
in conjunction with the generally lateral movement of maintenance sled
52
. During the counter-clockwise rotation of spreader mechanism
54
, perimetrical surface
98
of spreader mechanism
54
further engages and disperses the accumulated ejected ink in waste ink accumulation region
28
.
As shown in
FIGS. 1-4
and described above, a single spreader mechanism
54
engages the ink ejected from print cartridge
36
a
and accumulated in waste ink accumulation region
28
. However, one skilled in the art will recognize that the present invention can be adapted to accommodate ink jet printer systems having multiple pigment based ink cartridges. For example, and as described above, a single spreader mechanism can include both front and rear ink spreading surfaces. Where multiple pigment based ink cartridges are used, each ink spreading surface engages ink ejected through a different discharge cavity. Furthermore, a separate dedicated spreader mechanism can be provided for each print cartridge. It is also within the scope of the present invention to incorporate the spreader mechanism as an integral component of the maintenance sled.
By spreading the accumulated ink, and any solid components over a larger surface area of waste ink accumulation region
28
, the waste ink storage capacity of printer
10
is increased without increasing the size of the printer or increasing the size of the waste ink reservoir. In addition, by preventing the accumulation of waste ink and any solid components at levels which would impede the operation of the maintenance sled, the life of the maintenance assembly, and in turn the life of the printer, is increased.
The exemplifications set forth herein illustrate preferred embodiments of the invention and should not be construed as limiting the scope of the invention. Although the invention has been described in detail with reference to certain preferred embodiments, those skilled in the art will recognize that variations and modifications exist within the scope and spirit of the present invention as described and defined in the following claims.
Claims
- 1. An apparatus for increasing the waste ink storage capacity of an ink printing device, said ink printing device including a drive mechanism, said apparatus comprising a spreader mechanism coupled to said drive mechanism of said ink printing device, said drive mechanism driving said spreader mechanism in a rotary motion to engage and disperse waste ink over a waste ink accumulation region.
- 2. A maintenance unit for use in an ink jet printer, said ink jet printer including a printer frame having a waste ink accumulation region, said maintenance unit comprising:a maintenance frame coupled to said printer frame; a maintenance sled moveably coupled to said maintenance frame; and a spreader mechanism driveably coupled to said maintenance sled, wherein said spreader mechanism is rotated to disperse waste ink over said waste ink accumulation region as said maintenance sled moves relative to said maintenance frame.
- 3. A maintenance unit for use in an ink jet printer, said ink jet printer including a printer frame having a waste ink accumulation region, said maintenance unit comprising:a maintenance frame coupled to said printer frame; a maintenance sled moveably coupled to said maintenance frame; and a spreader mechanism driveably coupled to said maintenance sled, wherein said spreader mechanism disperses waste ink over said waste ink accumulation region as said maintenance sled moves relative to said maintenance frame, wherein said spreader mechanism comprises an elongate portion and a drive pin extending from said elongate portion, and wherein said maintenance sled includes a drive aperture for receiving said drive pin of said spreader mechanism.
- 4. A maintenance unit for use in an ink jet printer, said ink jet printer including a printer frame having a waste ink accumulation region, said maintenance unit comprising:a maintenance frame coupled to said printer frame; a maintenance sled moveably coupled to said maintenance frame; and a spreader mechanism driveably coupled to said maintenance sled, wherein said spreader mechanism disperses waste ink over said waste ink accumulation region as said maintenance sled moves relative to said maintenance frame, and wherein said spreader mechanism includes a perimetrical surface which engages said waste ink.
- 5. A maintenance unit for use in an ink jet printer, said ink jet printer including a printer frame having a waste ink accumulation region, said maintenance unit comprising:a maintenance frame coupled to said printer frame; a maintenance sled moveably coupled to said maintenance frame; and a spreader mechanism driveably coupled to said maintenance sled, wherein said spreader mechanism disperses waste ink over said waste ink accumulation region as said maintenance sled moves relative to said maintenance frame, and wherein said printer frame includes a pivot pin and said spreader mechanism includes a pivot aperture for receiving said pivot pin.
- 6. The maintenance unit as recited in claim 5, wherein said spreader mechanism rotates about said pivot pin due to a movement of said maintenance sled relative to said maintenance frame.
- 7. The maintenance unit as recited in claim 6, wherein said spreader mechanism further includes a perimetrical surface which engages said waste ink and disperses said waste ink.
- 8. A method for increasing the capacity of waste ink storage in an ink jet printer, said printer having at least one moveable printhead containing a nozzle capable of ejecting ink, the method comprising the steps of:ejecting ink out of said nozzle of said at least one printhead; and spreading the ejected ink over a waste ink accumulation region based on a movement of said printhead.
- 9. An ink jet printer including a printhead having nozzles for ejecting ink, said ink jet printer comprising:a printer frame having a waste ink accumulation region; a printhead carrier assembly including a carriage for carrying said printhead, said printhead carrier assembly being mounted to said printer frame, said printhead carrier assembly effecting a reciprocating movement of said printhead through a printing zone during a printing operation and effecting movement of said printhead into a maintenance zone during a maintenance operation, said maintenance zone including a maintenance start position and a maintenance capping region; and a maintenance unit coupled to said printer frame above said waste ink accumulation region, said maintenance unit comprising: a maintenance frame coupled to said printer frame; a maintenance sled moveably coupled to said maintenance frame; and a spreader mechanism driveably coupled to said carriage via said maintenance sled, wherein said spreader mechanism disperses waste ink over said waste ink accumulation region as said carriage moves relative to said maintenance frame.
- 10. An ink jet printer including a printhead having nozzles for ejecting ink, said ink jet printer comprising:a printer frame having a waste ink accumulation region; a printhead carrier assembly including a carriage for carrying said printhead, said printhead carrier assembly being mounted to said printer frame, said printhead carrier assembly effecting a reciprocating movement of said printhead through a printing zone during a printing operation and effecting movement of said printhead into a maintenance zone during a maintenance operation, said maintenance zone including a maintenance start position and a maintenance capping region; and a maintenance unit coupled to said printer frame above said waste ink accumulation region, said maintenance unit comprising: a maintenance frame coupled to said printer frame; a maintenance sled moveably coupled to said maintenance frame; and a spreader mechanism driveably coupled to said maintenance sled, wherein said spreader mechanism disperses waste ink over said waste ink accumulation region as said maintenance sled moves relative to said maintenance frame, wherein said spreader mechanism comprises an elongate portion and a drive pin extending from said elongate portion, and wherein said maintenance sled includes a drive aperture for receiving said drive pin of said spreader mechanism.
- 11. An ink jet printer including a printhead having nozzles for ejecting ink, said ink jet printer comprising:a printer frame having a waste ink accumulation region; a printhead carrier assembly including a carriage for carrying said printhead, said printhead carrier assembly being mounted to said printer frame, said printhead carrier assembly effecting a reciprocating movement of said printhead through a printing zone during a printing operation and effecting movement of said printhead into a maintenance zone during a maintenance operation, said maintenance zone including a maintenance start position and a maintenance capping region; and a maintenance unit coupled to said printer frame above said waste ink accumulation region ,said maintenance unit comprising: a maintenance frame coupled to said printer frame; a maintenance sled moveably coupled to said maintenance frame; and a spreader mechanism driveably coupled to said maintenance sled, wherein said spreader mechanism disperses waste ink over said waste ink accumulation region as said maintenance sled moves relative to said maintenance frame, and wherein said printer frame includes a pivot pin and said spreader mechanism includes a pivot aperture for receiving said pivot pin.
- 12. The ink jet printer as recited in claim 11, wherein said maintenance sled includes a drive aperture for receiving a drive pin of said spreader mechanism such that said spreader mechanism rotates about said pivot pin due to the movement of said maintenance sled relative to said maintenance frame thereby causing said waste ink to be dispersed.
- 13. An ink jet printer including a printhead having nozzles for ejecting ink, said ink jet printer comprising:a printer frame having a waste ink accumulation region; a printhead carrier assembly including a carriage for carrying said printhead, said printhead carrier assembly being mounted to said printer frame, said printhead carrier assembly effecting a reciprocating movement of said printhead through a printing zone during a printing operation and effecting movement of said printhead into a maintenance zone during a maintenance operation, said maintenance zone including a maintenance start position and a maintenance capping region; and a maintenance unit coupled to said printer frame above said waste ink accumulation region, said maintenance unit comprising: a maintenance frame coupled to said printer frame; a maintenance sled moveably coupled to said maintenance frame; and a spreader mechanism driveably coupled to said maintenance sled, wherein said spreader mechanism disperses waste ink over said waste ink accumulation region as said maintenance sled moves relative to said maintenance frame, and wherein said printer frame includes a pivot pin and said spreader mechanism comprises: an elongate portion having a pivot aperture for accepting a pivot pin on said printer frame; and a drive pin extending from said elongate portion.
- 14. The ink jet printer as recited in claim 13, wherein said spreader mechanism rotates about said pivot pin due to the movement of said maintenance sled relative to said maintenance frame thereby causing said waste ink to be dispersed.
US Referenced Citations (8)