Information
-
Patent Grant
-
6338770
-
Patent Number
6,338,770
-
Date Filed
Friday, February 11, 200024 years ago
-
Date Issued
Tuesday, January 15, 200222 years ago
-
Inventors
-
Original Assignees
-
Examiners
Agents
-
CPC
-
US Classifications
Field of Search
US
- 156 290
- 156 291
- 156 4415
- 156 548
- 156 553
- 156 555
- 156 581
- 156 580
- 156 582
-
International Classifications
-
Abstract
A method and apparatus for sealing a business form having pressure activated adhesive utilizes a minimum amount of equipment in a simple arrangement that has optimum versatility. Sealing is accomplished utilizing a first set of rolls which has a first substantially continuous roll and a second roll having a non-round shape with at least one projection (and typically having a configuration that in end view substantially simulates an airplane propeller including first and second projections angularly spaced about 180°). The first and second rolls are mounted in position for rotation about parallel axes so that the projections come into operative association with the first roll to perform the sealing action in a first position, and at a second position the entire second roll is not in operative association with the first roll. A stepper motor controls the rotation of the second roll. A second set of rolls is provided substantially immediately adjacent the discharge of the first set, and includes first and second rolls, and which are aligned with adhesive patterns of a business form that are perpendicular to the patterns sealed by the first set of rolls.
Description
BACKGROUND AND SUMMARY OF THE INVENTION
A wide variety of different types of equipment have been developed for sealing pressure activated adhesive (primarily pressure activated cohesive) business forms, and particularly mailer type business forms, such as shown in U.S. Pat. Nos. 5,174,493 and 5,201,464. The equipment developed includes edge sealing rolls which engage only the edge portions of the forms which contain the pressure activated cohesive, or steam roller type rollers which engage the entire forms (where inserts are not used), and often various types of turning mechanisms between sets of rolls so as to seal patterns of adhesive having different orientations. Typically such equipment applies a sealing force of at least 100 pounds per lineal inch, typically about 200 pounds per lineal inch.
In U.S. Pat. Nos. 5,938,880 and 5,944,946 a method and apparatus are disclosed that allow both the “horizontal” and “vertical” patterns of cohesive of mailer type business forms to be sealed in a single pass but without the crushing action provided by steam roll type equipment. While the method and apparatus in those patents is highly useful, it normally effects sealing of the same patterns of adhesive at a number of different locations, and is limited in its ability to adapt to different locations of the patterns of pressure sensitive cohesive on particular forms.
The method and apparatus according to the present invention allow the same advantages as the method and apparatus in U.S. Pat. Nos. 5,938,880 and 5,944,946 as far as being able to effectively seal both vertical and horizontal patterns of pressure activated adhesive in a single unidirectional path and without utilizing a steam roller action which can crush inserts or portions of the form between the patterns, but does so with greatly enhanced versatility, and also in a very cost effective manner. This enhanced versatility and cost effectiveness are provided by utilizing two different sets of rolls. The first set includes a first roll that is substantially continuous but a second roll which is non-round and has projection portions which are the only portions of the roll that can effectively seal with the first roll. The second roll is controlled by a stepper motor, in turn controlled by a microprocessor, so that a projection of the second roll can be brought into operative association with the first roll whenever desired, whether at a regular interval or irregular interval, in order to effectively seal a pressure activated adhesive pattern which is substantially parallel to the axes of rotation of the rolls. A second set of rolls, for sealing pressure activated adhesive patterns that are substantially perpendicular to the axes or rotation of the first set of rolls, is preferably provided substantially immediately adjacent the discharge from the first set of rolls, and includes a continuous roll and a pair of rolls that cooperate with the continuous roll (second and third rolls) and which are on a substantially common axis. The positions of the second and third rolls with respect to each other and the first roll may be adjusted so as to accommodate different widths of forms (spacings between the pressure activated cohesive patterns to be sealed by the second set of rolls). No further sealing equipment is necessary.
According to one aspect of the present invention there is provided a method of sealing a business form having pressure activated adhesive including a first pattern in a first dimension, and a second pattern in a second dimension substantially transverse to the first dimension, comprising: (a) Moving the form in a direction substantially parallel to the second dimension; and while practicing (a). (b) At only a first location, automatically applying at least about 100 pounds per lineal inch of pressure to the form at the second adhesive pattern to seal the form at the second adhesive pattern substantially without engaging any other portion of the form. And (c) at only a second location, spaced in the direction of movement of the form, automatically applying at least about 100 pounds per lineal inch of pressure to the form at the first adhesive pattern.
Typically (b) is practiced using a first set of rolls including a first substantially continuous roll having a length greater than the length of the second adhesive pattern, and a second roll having a non-round shape with at least one projection having a length greater than the length of the second adhesive pattern and comprising the only part of the second roll cooperating with the first roll to seal the first adhesive pattern. Also typically (c) is practiced using a second set of rolls including a first substantially continuous roll and a second substantially continuous roll, the second set of rolls aligned with the first adhesive pattern of the business form.
When the form comprises two first substantially parallel patterns of adhesive spaced from each other a first distance in the second dimension, then (c) is further practiced using a third roll of the second set rotatable about an axis substantially common with that of said second roll, and operatively spaced approximately the first distance from the second roll in the second dimension, so that the second and third rolls of the second set cooperate with the first roll of the second set to substantially simultaneously seal the two first patters of adhesive of the form. Where the form comprises two second substantially parallel patterns of adhesive spaced from each other a second distance in the first dimension, then (b) is further practiced to selectively rotate the first roll of the first set to come into contact with the form at both second patterns of adhesive to seal the form at both second patterns, but so as to substantially not come in contact with the form between the two second patterns of adhesive. When the form comprises a third second pattern of adhesive substantially parallel to both of the two second patterns of adhesive, disposed between the two second patterns in the first dimension, then (b) is further practiced to selectively rotate the first roll of the first set to come into contact with the form at all three of the second patterns of adhesive to seal the form at all three second patterns, but so as to substantially not come in contact with the form between the second patterns of adhesive.
In the preferred embodiment (a)-(c) are practiced so as to first move the form into operative association with the first set of rolls, and then into operative association with the second set of rolls. The invention also further comprises adjusting the positions of the second and third rolls of the second set with respect to each other along the common axis, to accommodate forms having different spacings between the second patterns of adhesive. The adjustment may be accomplished using any conventional mechanism or technique.
According to another aspect of the present invention a sealing apparatus is provided. The sealing apparatus comprises or consists of the following components: A first set of rolls comprising a first substantially continuous roll, and a second roll having a non-round shape with at least one projection, the first and second rolls mounted and positioned for rotation about substantially parallel axes and so that at a first position the at least one projection comes into operative association with the first roll to perform a sealing action, but the second roll besides the at least one projection not coming into operative association with the first roll, and at a second position the at least one projection is not in operative association with the first roll. A stepper motor operatively connected to the second roll of the first set so as to effect rotation thereof to move the at least one projection between the first and second positions. And a second set of rolls including a first substantially continuous roll having a first length and a second substantially continuous roll having a second length less than about half of the first length, the first and second rolls of the second set mounted and positioned for rotation about substantially parallel axes which are also parallel to the axes of the rolls of the first set of rolls.
Preferably the first set of rolls has a discharge which discharges material being sealed thereby in a first direction; and the second set of rolls is positioned substantially immediately adjacent the first set of rolls discharge in the first direction to receive material discharged from the discharge between the first and second rolls of the second set. Preferably the second set of rolls comprises the third roll substantially concentric with the second roll and rotatable about a substantially common axis, the third roll spaced from the second roll along the substantially common axis.
In order to provide a minimal amount of material while still having optimum operability, the second roll of the first set preferably has a configuration that in end view simulates an airplane propeller so that the at least one projection comprises first and second projections angularly spaced from each other about 180 degrees. Preferably the second roll of the first set is positioned above the first roll of the first set, and the first and second rolls are rotatable about substantially horizontal axes. Also, the stepper motor is typically connected to a microprocessor which controls the stepper motor.
In the normal use, the first and second sets of rolls are positioned and mounted so as to receive therebetween business forms having pressure activated adhesive, and the sets of rolls are capable of applying at least about 100 pounds of pressure per lineal inch to business forms disposed between the first and second rolls of each of the first and second sets of rolls.
According to yet another aspect of the present invention a set of pressure applying rolls per se is provided. The set of rolls comprises: A first substantially continuous roll rotatable about a first axis. A second non-round roll having a configuration that in end view substantially simulates an airplane propeller, including at least first and second projections angularly spaced from each other, and rotatable about a second axis substantially parallel to the first axis. The first and second rolls mounted and positioned so that at a first position one of the projections comes into operative association with the first roll to perform a sealing action, but the second roll besides the projections not coming into operative association with the first roll, and at a second position the projections are not in operative association with the first roll. And the second roll positioned above the first roll, and the first and second axes comprising substantially horizontal axes.
The first set of rolls also preferably comprises a stepper motor operatively connected to the second roll so as to effect rotation thereof to move the projections between the first and second positions. The second non-round roll may have exactly two projections angularly spaced from each other about 180°.
It is the primary object of the present invention to provide for the simple, versatile, and cost effective sealing of business forms having pressure activated adhesive, and apparatus for that purpose. This and other objects of the invention will become clear from an inspection of the detailed description of the invention and from the appended claims.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1
is an end view, looking in on the first set of rolls, of an exemplary sealing apparatus according to the present invention for practicing the exemplary method according to the invention;
FIG. 2
is a side view of the sealing apparatus of
FIG. 1
;
FIG. 3
is a top view of the sealing apparatus of
FIGS. 1 and 2
;
FIG. 4
is a side view of another exemplary configuration of the top roll of the first set of rolls of the sealing apparatus according to the invention;
FIG. 5
is a top plan schematic view showing a business form having various pressure activated cohesive patterns associated therewith and with the overlaying portions of the form cut away for clarity of illustration; and
FIG. 6
is a schematic cross-sectional view taken along lines
6
—
6
of the form of
FIG. 5
with the components greatly exaggerated in size for clarity of illustration, and adhesive patterns illustrated by Xs.
DETAILED DESCRIPTION OF THE DRAWINGS
FIGS. 1 through 3
illustrate an exemplary embodiment of a sealing apparatus according to the present invention, particularly useful in the practice of the method of sealing a business form having pressure activated adhesive. The business forms with which the sealing apparatus
10
of
FIGS. 1 through 3
is used are preferably those sold by Moore North America, Inc. under trademark “Sealermate®” having pressure activated adhesive (cohesive), such as exemplified by U.S. Pat. Nos. 5,174,493 and 5,201,464, the disclosures of which are hereby incorporated by reference herein.
The apparatus
10
comprises a first set of rolls
11
and a second set of rolls
12
. Forms are fed into association with the apparatus
10
substantially in the direction
13
seen in
FIGS. 2 and 3
, which is substantially perpendicular to the axes of rotation of the rollers of the sets
11
,
12
as hereinafter described.
A first set of rolls
11
, as seen in all of
FIGS. 1 through 3
, preferably comprises a first substantially continuous roll
14
, a conventional round roll having a shaft
15
which defines an axis of rotation
16
about which the roll
14
rotates. The round exterior surface
17
of the roll
14
is typically hard and substantially unyielding, such as made of steel, and is capable, when cooperating with the second, upper, roll
18
of the first set
11
, of applying a sealing force to a business form moving in the path
13
of at least about 100 pounds per lineal inch, e.g. about 200 pounds per lineal inch.
The second, upper, roll
18
of the first set
11
has a non-round configuration. While two exemplary configurations thereof are illustrated in
FIGS. 1 through 3
on one hand, and
FIG. 4
on the other (roll
18
′ in FIG.
4
), a wide variety of other configurations also may be provided. The construction of the roll
18
in
FIGS. 1 through 3
is the preferred construction, however, because that has a minimal amount of material which not only reduces the cost of the roll, but since it has a minimal amount of material that contacts the form reduces the pressure necessary to cause a suitable seal. Also the construction illustrated in
FIGS. 1 through 3
has less weight than most other constructions, so that the roll is very responsive, and a smaller stepper motor (as hereinafter described)
19
(see
FIG. 1
) may be used to effect rotation thereof.
The configuration of the roll
18
in
FIGS. 1 through 3
is, in end view, one that substantially simulates an airplane propeller having at least first and second projections
20
,
21
that are substantially uniformly extending from a central shaft
22
which is substantially parallel to the shaft
15
so that the roll
18
is rotatable about an axis of rotation
23
substantially parallel to the axis
16
, and substantially perpendicular to the path
13
. While in the preferred embodiment shown two projections
20
,
21
are provided, angularly spaced from each other approximately 180°, it is to be understood that three or even more projections could be provided, and preferably uniformly angularly spaced from each other around the shaft
22
.
The shafts
15
,
22
are mounted by suitable conventional bearings or the like (which may have a conventional adjustment mechanism for adjusting the spacing between the rolls
14
,
18
) so that the distal portions
24
of the projections
20
,
21
, when in closest proximity to the surface
17
of the first roll
14
, are slightly spaced from each other, the spacing between approximately equal to the thickness of the folded business form to be handled thereby. However, the rolls may be spring pressed together so that the projection distal portions
24
actually touch the surface
17
, but that is not preferred, rather a uniform, though adjustable, spacing is always provided between the projection distal portions
24
and the surface
17
.
The conventional stepper motor
19
is preferably controlled by a conventional microprocessor, such as illustrated schematically at
26
in FIG.
1
. The control, and control circuitry, supplied by the conventional microprocessor
26
can be very similar to that of a conventional rotary cutter. A sensor (such as an optical sensor)
27
(see
FIGS. 1 and 2
) is preferably provided to sense the leading edge of the form moving in the path
13
into the nip between the rolls
14
,
18
of the first set
1
1
, such sensing by the sensor
27
triggering an operation of the conventional stepper motor
19
to rotate the roll
18
so as to bring one of the distal portions
24
of the projection
20
,
21
into operative contact with a portion of the business form having a pressure activated adhesive pattern substantially parallel to the axes
16
,
23
so that sealing thereof is effected at the nip between the rolls
18
,
14
.
Except when one of the distal portions of a projection
20
,
21
is in operative association with the surface
17
of the roll
14
, the roll
18
is never in sealing position with respect to the business form moving in the path
13
. For example, if the roll
18
is rotated more than a few degrees from the operative position illustrated in
FIGS. 1 through 3
, it is in an inoperative position wherein no sealing, or other effect, on the business form is provided by the first set of rolls
11
. For example, if the roll
18
is rotated 90° from the position illustrated in
FIG. 2
, there clearly is no interaction between the roll
18
and the business form moving in the path
13
.
The shaft
22
and projections
20
,
21
also preferably are of metal or other hard material, and are capable, with the roll
14
, of applying a pressure of at least 100 pounds per lineal inch to a form at the nip between the rolls
14
,
18
when the roll
18
is in the position illustrated in
FIGS. 1 through 3
. While the airplane propeller simulating -configuration illustrated in
FIGS. 1 through 3
has many advantages, it is to be understood that other configurations could also be provided such as the elliptical configuration illustrated at
18
′ in
FIG. 4
, or a conventional round roll may be provided which has bumps forming projections at various locations therealong with the bumps spaced far enough from the surface of the round roll so that the surface of the round roll never operatively engages a business form fed in the nip between the rolls
18
,
14
. Other conventional constructions of label rolls may also be provided.
The length
29
(see
FIG. 1
) of the rolls
14
,
18
may be substantially the same, and in one preferred embodiment for handling a wide variety of different types of business forms, such as mailer type business forms, the length
29
is about 11 inches.
The second set of rolls
12
, visible in
FIGS. 2 and 3
, includes a first substantially continuous bottom roll
31
, and a second substantially continuous upper roll
32
. As seen in
FIG. 3
, the first roll
31
has a length
33
which is substantially the same as the length
29
, e.g. about 11 inches. However, the second roll
32
has a length
34
which is less than half the length
33
, e.g. about 2 inches. The rolls
31
and
32
are mounted and positioned (e.g. by conventional bearings) so that they are rotatable about substantially parallel axes, which axes are substantially parallel to the axes
16
,
23
. For example, as schematically illustrated in
FIGS. 2 and 3
, the first roll
31
is mounted by a shaft
35
while the second roll
32
is mounted by a shaft
36
. While the rolls
31
,
32
could be spring pressed together, preferably the rolls
31
,
32
are also positively mounted so that there is a slight spacing between the peripheries
37
,
38
thereof so that at the nip
39
therebetween there is a spacing approximately equal to the thickness of a folded business form to be sealed thereby. Preferably both of the rolls
31
,
32
are made of metal, such as steel, and have a substantially unyielding peripheral surface
37
,
38
.
The position of the roll
32
with respect to the roll
31
is adjustable, as indicated by the arrows
40
in
FIG. 3
, along the axis of rotation thereof defined by the shaft
36
. Adjustment in the dimension
40
may be accomplished utilizing any suitable conventional equipment for that purpose.
The length
34
of the roll
32
is designed so as to seal only edge portions of a form passing through the nip
39
, and not to provide a steam roller type action. In the preferred embodiment of the invention the set
12
also comprises a third roll
41
which is substantially identical to the roll
32
except positioned on the opposite edge of the first roll
31
from the second roll
32
, and is rotatable about a shaft
42
which has a substantially common axis with the shaft
36
. The second roll
41
is also adjustable in the dimension
40
utilizing conventional equipment, and when both the rolls
32
,
41
are active they seal side edges of a form passing through the nip
39
at the same time. If desired, one or both of the rolls
32
,
41
may be mounted on a mechanism that allows the roll
32
,
41
to be moved away from the roll
31
into an inoperative position. The adjustment in the dimension
40
preferably accommodates forms having spacings in the dimension
40
between pressure activated cohesive patterns of between about 5-11 inches.
In the preferred embodiment illustrated in the drawings, preferably a second set of rolls are positioned substantially immediately adjacent the discharge from the first set of rolls
11
. That is, the spacing (best seen in
FIG. 2
) between the sets
11
,
12
is no more than the distance necessary to allow the roll
18
to clear the roll
32
.
The rolls
14
,
31
,
32
can be powered—as indicated schematically by the motors
45
,
46
in
FIGS. 1 and 3
, or by gear trains instead of or in addition to the motors, controlled by the microprocessor control
26
. However, preferably a separate drive as shown schematically at
47
in FIG.
2
—is provided to transport the forms in the path
13
through the sets of rolls
11
,
12
, and then to some other location downstream of the rolls
12
. The drive
47
, which is illustrated only schematically because it is conventional, may comprise conventional rollers, conveyor belts, or the like. The drive
47
also may be controlled by the microprocessor
26
.
FIGS. 5 and 6
schematically illustrate an exemplary form that may be sealed utilizing the apparatus of
FIGS. 1 through 3
. The form is shown generally by reference numeral
50
and includes at least a first pattern
51
of pressure activated adhesive (cohesive) in a first dimension
52
, substantially perpendicular to the direction
13
and substantially parallel to the axes
16
,
23
. In the embodiment illustrated in
FIG. 5
there is also a second pattern of pressure activated cohesive
53
in the dimension
52
, and a third pattern
54
, the patterns
51
,
53
,
54
being substantially parallel to each other. The patterns
51
,
53
,
54
may be substantially continuous strips of cohesive, as indicated by the patterns
51
,
53
, or may be discontinuous strips, such as shown at
54
, made up of a plurality of spaced boxes, dots, or other configurations of adhesive. However, the patterns
51
,
53
,
54
are not restricted to strips, but may be any suitable conventional type of pattern used with pressure activated cohesive.
The form
50
also comprises one or more patterns of pressure activated cohesive
55
,
56
parallel to the direction
13
and substantially transverse to the dimension
52
. The patterns
55
,
56
are adjacent the side edges
57
of the form
50
and substantially perpendicular to the leading edge
58
of the form
50
, and may be of any conventional pattern type as described above with respect to the patterns
51
,
53
,
54
.
FIG. 5
shows a bottom surface
60
of the form
50
, with the top surface or surfaces
61
cut away so as to illustrate the patterns of cohesive, and is only exemplary. It is to be understood that any type of conventional pressure seal form may be utilized including V-fold, double parallel eccentric C-fold, C-fold, Z-fold and eccentric Z-fold, with or without built-in reply envelopes, and with or without inserts.
FIG. 6
is a schematic cross-sectional view along line
6
—
6
of
FIG. 5
of a Z-fold form, having an intermediate paper ply
62
between the top and bottom plies
61
,
60
, respectively, with the cohesive patterns shown schematically by Xs.
In the practice of the method of the present invention the first procedure is (a) moving the form
50
in the direction
13
(such as by using the conventional drive
47
), and while (a) is being practiced: (b) at only a fist location (that is the first set of rolls
11
in the preferred embodiment), automatically applying at least about 100 pounds per lineal inch of pressure to the form at the second adhesive pattern or patterns
51
,
53
,
54
to seal the form at the second adhesive patterns
51
,
53
,
54
substantially without engaging any other portion of the form; and (c) at only a second location (e.g. 12 in the preferred embodiment), automatically applying at least about 100 pounds per lineal inch of pressure to the form at the first adhesive pattern or patterns
55
,
56
to seal the form at the first adhesive patterns
55
,
56
substantially without engaging any other portion of the form. Preferably (a)-(c) are practiced so as to first move the form
50
into operative association with the first set of rolls
11
so that sealing takes place at each of the patterns
51
,
54
, and
53
, and then into contact with the second set of rolls
12
where sealing takes place at the patterns
55
,
56
using the rolls
32
,
41
, respectively. To seal at the patterns
51
,
54
,
53
after the sensor
27
senses the leading edge
58
of the form
50
, and knowing (based upon information input into the microprocessor
26
) where the patterns
51
,
54
,
53
will be with respect to that leading
58
, the microprocessor
26
controls the stepper motor
19
so as to rotate the roll
18
to bring a distal portion
24
of each of the projections
20
,
21
into operative association with the surface
17
of the roll
14
at each of the patterns
51
,
54
,
53
to apply the appropriate pressure to the form
50
thereat.
Depending upon the configuration of the form it may be only have one of the patterns
51
,
53
,
54
and only one of the patterns
55
,
56
, or may have additional patterns aside from those illustrated in
FIG. 5
, and it may have inserts. In any event, however, the construction and construction of the roll sets
11
,
12
may readily accommodate the positions of the patterns, and their spacing as by adjusting the positions between the rolls
32
,
41
in the dimension
40
, and operating the roll
18
with the stepper motor
19
.
It will thus be seen that according to the present invention a versatile, cost effective, and advantageous method and apparatus are provided for sealing business forms having pressure activated adhesive, or the like. While the invention has been herein shown and described in what is presently conceived to be the most practical and preferred embodiment thereof it will be apparent to those of ordinary skill in the art that many modifications may be made thereof within the scope of the invention, which scope is to be accorded the broadest interpretation of the appended claims so as to encompass all equivalent methods and apparatus.
Claims
- 1. A method of sealing a business form having pressure activated adhesive including a first pattern in a first dimension, and a second pattern in a second dimension substantially transverse to the first dimension, comprising:(a) moving the form in a direction substantially parallel to the second dimension; and while practicing (a): (b) at only a first location, automatically applying at least about 100 pounds per lineal inch of pressure to the form at the second adhesive pattern to seal the form at the second adhesive pattern substantially without engaging any other portion of the form; and (c) at only a second location, automatically applying at least about 100 pounds per lineal inch of pressure to the form at the first adhesive pattern to seal the form at the first adhesive pattern substantially without engaging any other portion of the form.
- 2. A method as recited in claim 1 wherein (b) is practiced using a first set of rolls including a first substantially continuous roll having a length greater than the length of the second adhesive pattern, and a second roll having a non-round shape with at least one projection having a length greater than the length of the second adhesive pattern and comprising the only part of the second roll cooperating with the first roll to seal the second adhesive pattern.
- 3. A method as recited in claim 2 wherein (c) is practiced using a second set of rolls including a first substantially continuous roll and a second substantially continuous roll, the second set of rolls aligned with the first adhesive pattern of the business form.
- 4. A method as recited in claim 3 wherein the form comprises two first substantially parallel patterns of adhesive spaced from each other a first distance in the second dimension, and wherein (c) is further practiced using a third roll of the second set rotatable about an axis substantially common with that of said second roll, and operatively spaced approximately the first distance from the second roll in the second dimension, so that the second and third rolls of the second set cooperate with the first roll of the second set to substantially simultaneously seal the two first patters of adhesive of the form.
- 5. A method as recited in claim 4 wherein the form comprises two second substantially parallel patterns of adhesive spaced from each other a second distance in the first dimension, and wherein (b) is further practiced to selectively rotate the first roll of the first set to come into contact with the form at both second patterns of adhesive to seal the form at both second patterns, but so as to substantially not come in contact with the form between the two second patterns of adhesive.
- 6. A method as recited in claim 5 wherein the form comprises a third second pattern of adhesive substantially parallel to both of the two second patterns of adhesive, and disposed between the two second patterns in the first dimension, and wherein (b) is further practiced to selectively rotate the first roll of the first set to come into contact with the form at all three of the second patterns of adhesive to seal the form at all three second patterns, but so as to substantially not come in contact with the form between the second patterns of adhesive.
- 7. A method as recited in claim 3 wherein (a)-(c) are practiced so as to first move the form into operative association with the first set of rolls, and then into operative association with the second set of rolls.
- 8. A method as recited in claim 1 wherein (c) is practiced using a second set of rolls including a first substantially continuous roll and a second substantially continuous roll, the second set of rolls aligned with the first adhesive pattern of the business form.
- 9. A method as recited in claim 8 wherein the form comprises two first substantially parallel patterns of adhesive spaced from each other a first distance in the second dimension, and wherein (c) is further practiced using a third roll of the second set rotatable about an axis substantially common with that of said second roll, and operatively spaced approximately the first distance from the second roll in the second dimension, so that the second and third rolls of the second set cooperate with the first roll of the second set to substantially simultaneously seal the two first patters of adhesive of the form.
- 10. A method as recited in claim 2 wherein the form comprises two second substantially parallel patterns of adhesive spaced from each other a second distance in the first dimension, and wherein (b) is further practiced to selectively rotate the first roll of the first set to come into contact with the form at both second patterns of adhesive to seal the form at both second patterns, but so as to substantially not come in contact with the form between the two second patterns of adhesive.
- 11. A method as recited in claim 10 wherein the form comprises a third second pattern of adhesive substantially parallel to both of the two second patterns of adhesive, and disposed between the two second patterns in the first dimension, and wherein (b) is further practiced to selectively rotate the first roll of the first set to come into contact with the form at all three of the second patterns of adhesive to seal the form at all three second patterns, but so as to substantially not come in contact with the form between the second patterns of adhesive.
- 12. A method as recited in claim 4 further comprising adjusting the positions of the second and third rolls of the second set with respect to each other along the common axis.
- 13. A sealing apparatus comprising:a first set of rolls comprising a first substantially continuous roll, and a second roll having a non-round shape with at least one projection, said first and second rolls mounted and positioned for rotation about substantially parallel axes and so that at a first position said at least one projection comes into operative association with said first roll to perform a sealing action, but said second roll besides said at least one projection not coming into operative association with said first roll, and at a second position said at least one projection is not in operative association with said first roll; a stepper motor operatively connected to said second roll of said first set so as to effect rotation thereof to move said at least one projection between said first and second positions; and a second set of rolls including a first substantially continuous roll having a first length and a second substantially continuous roll having a second length less than about half of said first length, said first and second rolls of said second set mounted and positioned for rotation about substantially parallel axes which are also parallel to said axes of said rolls of said first set of rolls.
- 14. Apparatus as recited in claim 13 wherein said first set of rolls has a discharge which discharges material being sealed thereby in a first direction; and wherein second set of rolls is positioned substantially immediately adjacent said first set of rolls discharge in said first direction to receive material discharged from said discharge between said first and second rolls of said second set.
- 15. Apparatus as recited in claim 14 wherein said second set of rolls comprises a third roll substantially concentric with said second roll and rotatable about a substantially common axis, said third roll spaced from said second roll along said substantially common axis.
- 16. Apparatus as recited in claim 13 wherein said second roll of said first set has a configuration that in end view simulates an airplane propeller so that said at least one projection comprises first and second projections angularly spaced from each other about 180 degrees.
- 17. Apparatus as recited in claim 16 wherein said second roll of said first set is positioned above said first roll of said first set, and said first and second rolls are rotatable about substantially horizontal axes.
- 18. Apparatus as recited in claim 17 wherein said stepper motor is connected to a microprocessor which controls said stepper motor.
- 19. Apparatus as recited in claim 13 wherein said first and second sets of rolls are positioned and mounted so as to receive therebetween business forms having pressure activated adhesive, and said sets of rolls are capable of applying at least about 100 pounds of pressure per lineal inch to business forms disposed between said first and second rolls of each of said first and second sets of rolls.
- 20. A set of pressure applying rolls, comprising:a first substantially continuous roll rotatable about a first axis; a second non-round roll having a configuration that in end view substantially simulates an airplane propeller, including at least first and second projections angularly spaced from each other, and rotatable about a second axis substantially parallel to said first axis; said first and second rolls mounted and positioned so that at a first position one of said projections comes into operative association with said first roll to perform a sealing action, but said second roll besides said projections not coming into operative association with said first roll, and at a second position said projections are not in operative association with said first roll; and said second roll positioned above said first roll, and said first and second axes comprising substantially horizontal axes.
- 21. A set of rolls as recited in claim 20, further comprising a stepper motor operatively connected to said second roll so as to effect rotation thereof to move said projections between said first and second positions.
- 22. A set of rolls as recited in claim 20, wherein said second non-round roll has exactly two projections, angularly spaced from each other about 180°.
US Referenced Citations (8)