U.S. patent number 3,554,531 [Application Number 04/738,031] was granted by the patent office on 1971-01-12 for binder assembly.
This patent grant is currently assigned to Harris-intertype Corporation. Invention is credited to Carl H. Heigl, Keith S. Macey.
United States Patent |
3,554,531 |
Heigl , et al. |
January 12, 1971 |
BINDER ASSEMBLY
Abstract
An improved binder assembly includes a collator for grouping
sheets into unfolded signatures or gathers which are sequentially
moved by a continuously operating conveyor to a pickup station.
Each gather is transferred from the pickup station to a stitching
station by a shuttle assembly. The shuttle assembly moves the
gather forwardly past a register member or gauge finger and then
moves the gather in a reverse direction toward the register member
to cause the gather to engage the register member and be positioned
in a predetermined relationship with a stitcher. Next, the unfolded
gather is either saddle or sidestitched along a stitch line
extending transversely to the path of movement of the shuttle
assembly. Finally, the stitched gather is pushed into a folder
assembly by the shuttle assembly as the next gather is moved by the
shuttle assembly toward the stitching station. The folder assembly
is selectively capable of folding or not folding the stitched
gather.
Inventors: |
Heigl; Carl H. (Westlake,
OH), Macey; Keith S. (Rocky River, OH) |
Assignee: |
Harris-intertype Corporation
(Cleveland, OH)
|
Family
ID: |
24966283 |
Appl.
No.: |
04/738,031 |
Filed: |
June 18, 1968 |
Current U.S.
Class: |
270/58.17;
270/37; 270/58.29 |
Current CPC
Class: |
B42B
4/00 (20130101) |
Current International
Class: |
B42B
4/00 (20060101); B42g 001/02 (); B65h 039/02 () |
Field of
Search: |
;270/53,58,37,55
;227/99,104,105,103 ;271/48,50,76 ;11/1,5 ;156/156--71,447 |
References Cited
[Referenced By]
U.S. Patent Documents
Primary Examiner: Charles; Lawrence
Claims
We claim:
1. An assembly for use in interconnecting a plurality of sheets of
material, said assembly comprising conveyor means for continuously
moving collated sheets of material, reciprocatable shuttle means
for transferring the sheets of material from said conveyor means to
a stitching station, registration means for locating the sheets of
material in a predetermined relationship with said stitching
station, and stitcher means at said stitching station for stitching
the sheets of material along a stitch line extending transversely
to the path of movement of said reciprocatable shuttle means, said
stitcher means being selectively operable to perform either saddle
or side stitching operations on the sheets of material.
2. An assembly as set forth in claim 1 wherein said reciprocatable
shuttle means includes clamp means for holding the sheets of
material and drive means for moving said clamp means in a forward
direction to such an extent that the sheets of material held by the
clamp means move past said registration means and for moving said
clamp means in a reverse direction to cause trailing edges of the
sheets of material to be moved into engagement with said
registration means.
3. An assembly as set forth in claim 2 wherein said assembly
further includes a longitudinally extending and transversely
sloping support surface along which said conveyor means and said
shuttle means move the sheets of material, and longitudinally
extending guide means along a lower portion of said support surface
for effecting registration of edges of the sheets which extend
transversely to the trailing edges of the sheets.
4. An assembly as set forth in claim 2 wherein said registration
means includes a pivotally mounted stop member which is pivoted to
an inoperative position upon engagement by the sheets of material
with the stop member as the sheets of material are moved in the
forward direction, and which pivots to an operative position when
the sheets of material are moved past the stop member, said stop
member being located in the operative position for registering the
trailing edges of the sheets of material as the sheets of material
move in the reverse direction.
5. An assembly as set forth in claim 2 wherein said reciprocatable
shuttle means further includes control means for operating said
clamp means between a closed condition in which the sheets of
material are clampingly engaged by said clamp means and an open
condition in which the sheets of material are free to move relative
to said clamp means, said clamp means being operated from said
closed condition to said open condition by said control means after
the sheets of material have been moved past said registration means
and said clamp means has started to move in the reverse direction
and before the trailing edges of the sheets of material engage said
registration means to thereby enable relative movement to occur
between said clamp means and the sheets of material when the
trailing edges of the sheets the sheets of material engage said
registration means.
6. An assembly as set forth in claim 1 wherein said reciprocatable
shuttle means includes pusher means for shoving previously stitched
sheets of material from said stitching station as said
reciprocatable shuttle means moves other sheets of material toward
said stitching station.
7. An assembly as set forth in claim 6 wherein said reciprocatable
shuttle means further includes clamp means for clampingly engaging
the sheets of material while they are being moved from said
conveyor means to said stitching station, said pusher means being
formed by a leading end portion of said clamp means.
8. An assembly as set forth in claim 6 further including guide
means for engaging an edge portion of the group of sheets as they
are being moved by said pusher means to retain the group of sheets
against rotation relative to said pusher means.
9. An assembly as set forth in claim 6 wherein said pusher means
engages a trailing edge portion of the stitched group of sheets at
a location which is closer to one side edge portion of the stitched
group of sheets than to an opposite side edge portion of the
stitched group of sheets, said assembly further including first
guide means for engaging said one side edge portion and second
guide means for engaging said opposite side edge portion to retain
the stitched group of sheets against rotational movement relative
to said clamp means when the stitched group of sheets is being
moved by said pusher means.
10. An assembly as set forth in claim 1 further including folder
means mounted adjacent to said stitching station for folding
saddle-stitched sheets of material along the stitch line after they
are stitched at said stitching station, said reciprocatable shuttle
means including means for moving stitched sheets of material from
said stitching station to said folder means while moving other
sheets of material from said conveyor means to said stitching
station, said folder means being operable to move the stitched
sheets of material forwardly at a greater speed than the speed of
forward movement of said reciprocatable shuttle means to thereby
move the stitched sheets of material out of engagement with the
reciprocatable shuttle means.
11. An assembly as set forth in claim 1 further including folder
means mounted adjacent to said stitching station for folding
saddle-stitched sheets of material along the stitch line after they
are stitched at said stitching station, said folder means including
a control assembly which is selectively actuatable between one
condition wherein said folder means is operable to fold
saddle-stitched sheets of material and another condition wherein
said folder means is inoperable to fold sheets of material to
thereby enable side stitched sheets of material to be processed
without being folded.
12. An assembly as set forth in claim 1 further including a support
surface adjacent to said registration means for supporting the
sheets of material, and biasing means located adjacent to said
registration means for pressing the sheets of material toward said
support surface to retain the sheets of material in the
predetermined relationship with said stitching station.
13. An assembly as set forth in claim 12 wherein said biasing means
includes a roller mounted for pivoting movement toward and away
from said support surface.
14. An assembly as set forth in claim 1 further including
adjustable coupling means interconnecting said conveyor means and
said shuttle means, said conveyor means including finger means for
engaging trailing edges of the sheets of material to thereby move
the sheets of material, said coupling means being selectively
adjustable to vary the relationship between said finger means and
said shuttle means to enable said assembly to be used for
interconnecting sheets of material of different sizes.
15. An assembly as set forth in claim 14 wherein said registration
means is adjustable relative to said stitcher means to enable said
registration means to position sheets of material of different
sizes in the predetermined relationship with said stitching
station.
16. An assembly as set forth in claim 1 further including
adjustment means for varying the relationship between said shuttle
means and said conveyor means to enable said shuttle means to
engage sheets of material of different sizes with their centerline
which extend transversely to the path of movement of said shuttle
means in the same predetermined position relative to said shuttle
means.
17. An assembly as set forth in claim 1 wherein said registration
means includes a member for engaging edge portions of the sheets to
register the sheets relative to said stitcher means and means for
adjusting the position of said member relative to said stitcher
means to register sheets for either saddle or side stitching.
18. An assembly for use in interconnecting a plurality of sheets of
material, said assembly comprising stitcher means mounted at a
stitching station for stitching a plurality of sheets of material,
stop means for engaging the trailing edges of the sheets of
material to position the sheets of material in a predetermined
relationship with said stitcher means, and shuttle means for moving
the sheets of material in a forward direction past the stop means
and then in a reverse direction to cause the trailing edges of the
sheets of material to engage said stop means to thereby position
the sheets of material relative to said stitcher means.
19. An assembly as set forth in claim 18 wherein said shuttle means
includes control means for operating said shuttle means from a
closed condition gripping the sheets of material to an open
condition in which the sheets of material are free to move relative
to said shuttle means as said shuttle means is moving in the
reverse direction and before the trailing edges of the sheets of
material engage said stop means.
20. An assembly as set forth in claim 18 wherein said shuttle means
includes pusher means for abuttingly engaging and shoving stitched
sheets of material away from said stitching station as said shuttle
means moves other sheets of material to said stitching station.
21. An assembly as set forth in claim 20 further including drive
means mounted adjacent to said stitching station for engaging the
stitched sheets of material and moving them away from said pusher
means as said shuttle means moves the other sheets of material to
said stitching station.
22. An assembly as set forth in claim 18 wherein said stop means is
mounted for movement from a first position in which said stop means
is operative to locate the sheets of material relative to the
stitching station to a second position in which said stop means is
inoperative for locating the sheets of material, said stop means
being movable from said first position to said second position
position by engagement of leading edges of the sheets of material
with the stop means as the sheets of material are moved in the
forward direction by said shuttle means, said stop means being
movable from said second position to said first position when the
trailing edges of the sheets of material are moved forwardly past
said stop means by said shuttle means to thereby enable said stop
means to locate the sheets of material relative to said stitcher
means as the sheets of material move in the rearward direction.
23. An assembly as set forth in claim 18 further including
retaining means for engaging at least one of the sheets of material
and retarding movement of the sheets of material relative to said
stop means after the trailing edges of the sheets of material have
been brought into engagement with said stop means.
24. A binder assembly for interconnecting a plurality of sheets,
said assembly comprising a longitudinally extending support surface
for supporting groups of sheets with the sheets of each group in a
flat face-to-face relationship, a conveyor having spaced-apart
fingers cooperating with said support surface for shoving each
group of sheets along said support surface in a forward direction
at a first continuous speed to a pickup station, a reciprocatable
shuttle assembly for clampingly engaging each group of sheets in
turn at said pickup station and moving the clamped group of sheets
forwardly to a stitching station at a second speed which is greater
than said first speed to thereby move the clamped group of sheets
clear of a finger of said conveyor which had been shoving the group
of sheets along said support surface at said first speed, a stop
member located adjacent to said stitching station for engaging an
edge portion of the group of sheets to position the group of
sheets, a stitcher assembly located at said stitching station in a
predetermined relationship with said stop member for stitching the
group of sheets along a stitch line extending transversely of the
path of movement of said reciprocatable shuttle assembly, and a
folder assembly located adjacent to said stitcher assembly for
receiving and folding stitched groups of sheets along the stitch
line.
25. A binder assembly as set forth in claim 24 further including a
pusher member associated with said reciprocatable shuttle assembly
for shoving a stitched group of sheets from said stitching station
into said folder assembly as another group of sheets is moved form
said pickup station to said stitching station by said
reciprocatable shuttle assembly.
26. A binder assembly as set forth in claim 24 wherein said
reciprocatable shuttle assembly is movable in one direction to move
a group of sheets past said stop member to said stitching station
and is movable in a direction opposite to said first direction to
cause the trailing edge portion of the group of sheets to engage
said stop member.
27. A binder assembly as set forth in claim 26 further including
retaining means for engaging the group of sheets and retarding
movement of the group of sheets after the trailing edge portion of
the group of sheets has been brought into engagement with said stop
member.
28. A method of interconnecting a plurality of sheets, said method
comprising the steps of continuously moving a group of sheets to a
pickup station with the sheets in a flat face-to-face relationship,
reciprocating a shuttle assembly to move the group of sheets from
the pickup station to a stitching station, arresting movement of
the group of sheets at the stitching station by engaging an edge
portion of the group of sheets with a stop member to position the
group of sheets in a predetermined relationship with the stitching
station, and stitching the group of sheets along a stitch line
which extends transversely of the path of movement of the shuttle
assembly.
29. A method as set forth in claim 28 further including the method
step of pushing a previously stitched group of sheets away from
said stitching station with the shuttle assembly during said
reciprocating step.
30. A method as set forth in claim 28 wherein said step of
reciprocating the shuttle assembly includes gripping the group of
sheets at the pickup station with the shuttle assembly, moving the
shuttle assembly in a forward direction to such an extent that the
group of sheets is moved past the stop member, moving the shuttle
assembly in a reverse direction toward the stop member, and
releasing the group of sheets as they move in the reverse direction
to thereby cause the trailing edge portion of the group of sheets
to move in such a manner as to engage the stop member.
31. An assembly for interconnecting a plurality of sheets, said
assembly comprising a longitudinally extending planar support
surface for supporting the sheets, collator means for forming a
plurality of sheets into groups on said support surface, conveyor
means for moving the groups of sheets along said support surface
toward a pickup station, shuttle means for sequentially moving the
groups of sheets from said pickup station to a stitching station,
stitcher means at said stitching station for stitching the groups
of sheets, longitudinally extending guide means located adjacent to
one longitudinally extending side portion of said support surface
for side registering each group of sheets in turn relative to said
stitcher means, said support surface sloping transversely
downwardly toward said guide means at an acute angle to a
horizontally extending plane whereby a group of sheets tends to
move downwardly into engagement with said guide means under the
influence of gravity, and folder means adjacent to said stitching
station for folding the stitched group of sheets, said shuttle
means including clamp means located adjacent to said guide means
for gripping a group of sheets, shuttle drive means for
reciprocating said clamp means between said pickup station and said
stitcher station, said clamp means including upper and lower
longitudinally extending clamp members for clampingly engaging
opposite sides of a group of sheets, said clamp members extending
between said stitcher means and said guide means in a direction
generally parallel to said guide means when said clamp means is at
said stitching station, and control means for operating said clamp
means to grip a group of sheets at said pickup station and to
release the group of sheets at said stitching station with a
lowermost edge portion of the group of sheets in engagement with
said guide means.
32. An assembly as set forth in claim 31 wherein said conveyor
means includes a conveyor drive means for operating said conveyor
means to move the groups of sheets forwardly to said pickup station
at a first speed, said shuttle drive means being operative to move
said clamp means forwardly at a speed which is at least as great as
said first speed when said clamp means grips a group of sheets at
said pickup station and to accelerate said clamp means to a second
speed which is substantially greater than said first speed
immediately after the group of sheets is gripped at said pickup
station to thereby move the gripped group of sheets away from said
conveyor means, and said folder means includes a folder drive means
for operating said folder means to move groups of stitched sheets
engaged by said folder means forwardly at a third speed which is
greater than said second speed.
33. An assembly as set forth in claim 31 further including
adjustment means selectively operable between one condition wherein
said assembly is operable to sidestitch the groups of sheets and
another condition wherein said assembly is operable to saddle
stitch the groups of sheets, said folder means including control
means which is selectively operable to prevent side stitched groups
of sheets from being folded by said folder means, said shuttle
means being operable to position each group of sheets with its
centerline to one side of said stitcher means when said adjustment
means is in said one condition, and said shuttle means being
operable to position each group of sheets with its centerline in
alignment with said stitcher means when said adjustment means is in
said other condition.
34. A method of interconnecting a plurality of unfolded sheets,
said method comprising the steps of continuously feeding a series
of groups of sheets in one direction at a first speed, accelerating
the leading group of sheets in said one direction to a second speed
which is faster than said first speed, depositing the leading group
of sheets in a predetermined position at a stitching station,
stitching the leading group of sheets at the stitching station
along a stitch line extending transversely to the direction in
which the series of groups of sheets is being fed, moving the
stitched group of sheets away from the stitching station in said
one direction toward a folding station at a third speed which is at
least as great as the second speed while moving a next succeeding
group of sheets toward the stitching station, folding the stitched
group of sheets along the stitch line at the folding station, and
continuing the movement of the stitched and folded group of sheets
in said one direction.
35. A method as set forth in claim 34 further including the method
step of trimming the edge portion opposite the stitched and folded
edge portion along a line extending transversely to the direction
of feed.
36. A method of interconnecting a plurality of sheets of material
at a stitching station, said method comprising the steps of moving
the sheets in a forward direction from a position behind a stop
member mounted at a predetermined location relative to the
stitching station to a position in front of the stop member,
registering the sheets relative to a stitcher means at the
stitching station by moving the sheets in a reverse direction from
the position in front of the stop member to cause trailing edge
portions of the sheets to engage the stop member, and stitching the
sheets with the stitcher means while maintaining the trailing edge
portions of the sheets in engagement with the stop member to
thereby maintain the sheets in register with the stitcher means
during said stitching step.
37. A method as set forth in claim 36 further including the method
step of moving the stop member from an extended position to a
retracted position in response to engagement of a leading edge
portion of the sheets with said stop member during said step of
moving the sheets in a forward direction.
38. A method as set forth in claim 36 further including the method
step of pushing previously stitched sheets away from the stitching
station contemporaneously with said step of moving the sheets in a
forward direction.
Description
This invention relates to 48 the gather binder assembly which is
corner stitched of either side or saddle stitching unfolded flat
collated gathers.
A known binder system uses one machine to fold sheets which are
then collated and saddle stitched by another machine. Due to the
fact that the binder system folds the sheets before they are
stitched the second machine can perform only saddle stitching
operations. The relatively limited operational capability and high
cost of this known binder system has resulted in its being used
primarily in printing shops having a relatively large volume of
saddle stitched work. Another known binder assembly utilizes an
intermittently operated conveyor to move unfolded sheets to a
stitching station where they are either saddle or side stitched.
This binder assembly has not received general acceptance in the
industry, probably because of its relatively slow operating speed
and difficulty in consistently obtaining proper registration
between the sheets of a gather to be stitched and the stitcher. The
probable registration difficulties are believed to be inherent in
the intermittent operation of the conveyor assembly and the
resulting repeated acceleration and deceleration of the sheets.
This also limits the speed at which the mechanism can effectively
operate.
Accordingly, it is an object of this invention to provide a new and
improved versatile binder assembly which is relatively inexpensive
and is capable of high speed operation on either saddle or side
stitching unfolded collated sheets wherein the entire operation is
performed by a single machine.
Another object of this invention is to provide a new and improved
binder assembly and method which consistently maintains proper
registration between gathers of sheet material during high speed
saddle and side stitching operations.
Another object of this invention is to provide a new and improved
inline binder assembly which is compact, easily assembled, reliable
in operation and relatively inexpensive.
Another object of this invention is to provide a new and improved
binder assembly and method of operation which includes continuously
operating a conveyor to transport unfolded gathers to a pickup
station and reciprocating a shuttle assembly to transfer the
gathers to a stitcher station and effect registration of the
unfolded gathers relative to a stitcher assembly which is
selectively operable to either side or saddle stitch the
gathers.
Another object of this invention is to provide a new and improved
binder assembly and method wherein a shuttle moves a gather or
signature past a registration stop associated with a stitcher and
then reverses the direction of movement of the gather to cause a
trailing edge portion of the gather to engage the registration stop
to thereby consistently effect proper registration of gathers with
the stitcher during high speed operation of the binder
assembly.
Another object of this invention is to provide a new and improved
binder assembly and method wherein a reciprocatable shuttle is
operable to push a previously stitched gather away from a stitching
station while transporting another gather to the stitching
station.
These and other objects and features of the invention will become
more apparent upon a consideration of the following description
taken in connection with the accompanying drawings wherein:
FIG. 1 is a pictorial schematic illustration of a binder assembly
forming a preferred embodiment of the invention, parts of the
binder assembly being broken away and some of the covering panels
removed for purposes of clarity of illustration;
FIG. 2 is a pictorial schematic plan view, taken along the line 2-2
of FIG. 1, further illustrating the structure of the binder
assembly;
FIGS. 3--6 are schematic illustrations depicting the transfer of a
group of sheets or gather from a pickup station to a stitching
station where the gather is saddle-stitched;
FIGS. 7--9 depict schematically the movement of a next succeeding
gather away from the pickup station toward the stitching station
and the movement of a previously saddle-stitched gather from the
stitching station into a folder mechanism;
FIGS. 10--13 schematically illustrate the saddle stitching of a
relatively small gather;
FIGS. 14--17 schematically illustrate the side stitching of a
relatively large gather;
FIGS. 18--20 schematically illustrate the movement of a next
succeeding gather toward the stitching station where it will be
side stitched and the movement of a previously side stitched gather
into the folder mechanism;
FIG. 21 is a schematic illustration of a drive mechanism for a
shuttle assembly which transfers the gathers from the pickup
station to the stitching station;
FIG. 22 illustrates an adjustable coupling which interconnects a
collator drive and a drive for the shuttle assembly, stitcher
assembly, and folder mechanism; and
FIG. 23 is a schematic illustration of a folder mechanism for
folding saddle-stitched gathers.
The present invention provides a versatile inline binder assembly
30 which is selectively operable to saddle, side or corner stitch
unfolded collated groups of sheets or gathers. The binder assembly
30 includes a flat sheet collator 32 having a series of transfer
stations (only one of which is partially illustrated in FIG. 1) for
transferring unfolded sheets of material from a stack 34 to a
support surface or tray 36. The sheets of material are deposited in
a flat, face-to-face relationship on the support surface 36 and are
engaged by fingers 38 of a collator conveyor 40 which is
continuously operated at a constant speed. The fingers 38 of the
conveyor 40 shove the gathers along the support surface 36 to a
pickup station 44 where each gather is clampingly engaged in turn
by a reciprocatable shuttle assembly 46 and transferred to a
stitching station 48.
At the stitching station 48 the gather is saddle, side or corner
stitched along a transversely extending stitch line by a stitcher
assembly 56 (a saddle stitch being formed by the stitches 50 and 52
in FIG. 1). The stitched gather is then moved from the stitching
station 48 into a folder mechanism 60 where the gather is folded,
in the case of a saddle-stitched gather, along the stitch line and
trimmed along a transversely extending surface or face by a trimmer
knife 62. A belt conveyor 64 then transfers the stitched and folded
gather to a receiving station 66. The folder mechanism 60 is
selectively adjustable between an operative position or condition
wherein saddle-stitched gathers are folded along the stitch line
and an inoperative or bypass position or condition wherein side or
corner stitched gathers pass through the folder mechanism without
being folded.
The flat sheet collator 32 transfers unfold sheets of material from
a series of piles or stacks 34, only one of which is partially
shown in FIG. 1, to the support surface 36 to form gathers or
signatures each of which includes one sheet from each stack of the
series of stacks. To this end, a plurality of sucker heads 70 are
provided at each of a plurality of transfer stations located in a
spaced apart relationship along the longitudinally extending
support surface 36. The sucker heads 70 are connected by vacuum
lines 72 to a source of vacuum or relatively low pressure. Movement
of an arm 76 reciprocates each of the sucker heads 70 from a
position engaging the uppermost sheet on the stack 34 to a forward
position where the sheets engaged by the sucker heads are directly
over the support surface 36. The vacuum to each of the sucker heads
70 is then shut off and the sheets are deposited on either the
support surface 36 or a gather. Although only the sucker head 70
for the last transfer station of the series of transfer stations is
shown in FIG. 1, it will be understood that there are a plurality
of similar stations having similar sucker heads which are connected
to a support bar 80 for movement simultaneously with the sucker
head 70. Thus, one sheet from each of a plurality of stacks of
sheets is transferred from the associated stack of sheets to the
support surface 36 or a gather with each forward stroke of the arm
76.
The groups of sheets or gathers are continuously moved along the
support surface 36 so that each gather is moved in turn past each
of the transfer stations and receives a sheet from a stack 34 of
sheets associated with the transfer station. This continuous
movement of the series of gathers results from the action of the
collator conveyor 40 which includes an endless chain 84 having an
upper run which is continuously moved in a forward or downstream
direction, indicated by the arrow 86 in FIG. 1, at a substantially
constant speed to maintain the fingers 38 in engagement with the
gathers as they are continuously moved toward the pickup station
44. The fingers 38 maintain the trailing edges of the sheets of
each gather in registration as the gathers are moved along the
longitudinally extending support surface 36. The longitudinally
extending support surface 36 slopes transversely downwardly toward
a longitudinally extending guide rail or section 88 to maintain
longitudinally extending lower edge portions of the sheets of each
gather in registration. Since the general construction of the flat
sheet collator 32 is known to those skilled in the art, it is
believed that a further description of the structure of the
collator is not necessary at this time.
The reciprocatable shuttle assembly 46 clampingly engages each
gather in turn at the pickup station 44 and moves the gather toward
the stitching station 48 where an edge portion of the gather is
brought into engagement with a registration finger 90 to position
the gather in a predetermined relationship relative to stapler or
stitcher heads 94 and 96 of the stitcher assembly 56. While the
stitcher assembly 56 is stapling or stitching a gather positioned
at the stitching station 48, the shuttle assembly 46 is moved back
toward the pickup station 44 to engage the next gather of the
series of gathers which are continuously being moved toward the
pickup station 44 by the collator conveyor 40. A drive mechanism
100 reciprocates or moves the shuttle assembly back and forth
between the pickup station 44 and the stitching station 48 at a
speed which, during the major portion of each stroke of the shuttle
assembly 46, is substantially greater than the constant speed at
which the collator conveyor 40 is continuously operated. This
enables the shuttle assembly 46 to complete a forward stroke from
the pickup station 44 to the stitching station 48 and a reverse or
return stroke from the stitching station to the pickup station
while the next succeeding gather is being moved to the pickup
station by the collator conveyor 40.
A control assembly 102 is provided for actuating the shuttle
assembly 46 between a closed or clamping condition and an open or
release condition. When a gather is being transferred from the
pickup station 44 to the stitching station 48 the shuttle assembly
is in the closed condition and an upper gripper or clamp bar 106 is
pressed toward a lower gripper or clamp bar (not shown) by a
biasing spring to securely hold the gather between the gripper
bars. When the shuttle assembly 46 reaches the stitching station
48, the control assembly 102 operates it to the open condition
wherein the upper and lower gripper bars are spaced apart to enable
the gather to be released and deposited at the stitching
station.
The binder assembly 30 is selectively operable to either corner,
saddle or sidestitch different sized gathers of sheet material. The
saddle stitching of a relatively large gather 110 of sheet material
and a direct mail card 112, which form the first gather in a series
of gathers, is illustrated in FIGS. 3--6. As the gather 110 is
moved to a position wherein the centerline of the gather is in
alignment with the centerline 114 of the pickup station 44, the
relatively large gather 110 is clampingly engaged between the upper
gripper bar 106 and the lower gripper bar (not shown) of the
reciprocatable shuttle assembly 46. When the gather 110 is
clampingly engaged, the shuttle assembly 46 is traveling forwardly
at a speed which is equal to or greater than the substantially
constant forward speed of the collator conveyor 40 (see FIG. 3).
The shuttle assembly 46 is then accelerated to a speed which is
slightly greater than twice the speed of operation of the collator
conveyor 40 to enable the shuttle assembly to transfer the gather
to the stitching station 48 and return to the pickup station 44
before the next gather reaches the pickup station 44. As the
shuttle assembly 46 is accelerated toward the stitching station,
the trailing edge portion 116 of the gather 110 moves away from the
finger 38 of the collator conveyor 40 to allow the finger to be
moved downwardly along an arcuate path through a slot 120 in the
support surface 36 without damaging the gather 110 (See FIGS. 2 and
4).
While the gather 110 is being moved forwardly by the shuttle
assembly 46, a leading edge portion 124 of the gather moves into
engagement with an arcuate, rearward cam surface 126 of the
registration finger 90 (see FIG. 1). The registration finger 90 is
pivotally mounted at 130 to enable the registration finger to be
pivoted downwardly against the influence of a counterbalance weight
or spring by the action of the leading edge portion 124 on the cam
surface 126. This enables the gather 110 to pass over the
registration finger, in the manner illustrated schematically in
FIG. 4, by forcing the registration finger 90 downwardly to an
inoperative or retracted position. Of course, as the gather is
moved past the registration finger 90 it pivots upwardly to the
operative or extended position of FIGS. 1 and 5. After the gather
110 has been moved forwardly past the registration finger 90, the
gather is moved in the reverse or upstream direction to bring the
trailing edge portion 116 of the gather into engagement with a stop
or registering surface 134 on the finger 90. The stop surface 134
registers or positions the gather 110 in a predetermined
relationship relative to the stitcher heads 94 and 96 of the
stitcher assembly 56. While in the present embodiment of the
invention the trailing edge portion 116 of the gather 110 is used
in effecting registration of the gather, it is contemplated that in
other embodiments of the invention the leading edge portion 124 of
the gather may be used in effecting registration of the gather.
In view of the foregoing description it can be seen that as the
clamp assembly 46 moves forwardly, from the position shown in FIG.
3 through the position shown in FIG. 4 to the position shown in
FIG. 5, the gather 110 is moved across the registration finger 90
and the registration finger is first pivoted downwardly by the
gather and then released to pivot upwardly to its normal or
operative condition. The shuttle drive mechanism 100 (FIGS. 1 and
2) then reverses the direction of movement of the shuttle assembly
46 to move the shuttle assembly in the upstream direction while
maintaining clamping engagement with the gather 110. The gather is
released while the trailing edge portion 116 of the gather is
spaced apart from the stop surface 134 of the registration finger
90. Due to the momentum of the gather, the upstream or reverse
movement of the gather 110 continues, even though the gather has
been released by the shuttle assembly 46. This movement brings the
gather 110 into abutting engagement with the stop surface 134 of
the registration finger 90 and thereby positions the gather in a
predetermined location relative to the stitcher heads 94 and 96. A
retaining means, in the form of a wheel 140 (see FIGS. 1 and 2)
presses the gather downwardly against the support surface 36 to
prevent the gather from bouncing or moving away from the
registration finger 90 once the gather has been brought into
engagement with the stop surface 134 of the registration finger. It
should be noted that the gather 110 is positioned or registered
transversely relative to the stitcher heads 94 and 96 by the
longitudinally extending guide section 88 along which the gather
slides.
When the gather 110 is positioned in registration with the stitcher
heads 94 and 96, the centerline of the gather 110 is in alignment
with a transversely extending stitch line, indicated at 148 in FIG.
6. Therefore, operation of the stitcher assembly results in the
gather 110 being saddle-stitched along its centerline. The direct
mail card 112 extends past the centerline of the gather 110 and is
engaged by one of the stitches to securely interconnect the mail
card and the sheets of the gather. The stitcher assembly 56 is
operated by downward movement of a pair of opposite drive arms 152
and 154 (see FIG. 1) which are connected at their upper ends to a
stitcher actuating bar 156 and at their lower ends to a crank
assembly 158 for reciprocating the drive arms 152 and 154 and the
actuating bar 156 to operate the stitcher heads 94 and 96.
Operation of the stitcher heads 94 and 96 staples or stitches the
gather with wire obtained from a pair of supply coils 160.
The shuttle assembly 46 continues its reverse or return stroke
toward the pickup station 44 while the stitcher assembly 56 is
stitching the gather 110 at the stitching station 48. After the
shuttle assembly 46 has reached the pickup station and been
accelerated to a forward speed which is at least as great as the
forward speed of the finger 38, the shuttle assembly 46 clampingly
engages a next succeeding gather 162 at the pickup station 44 (see
FIG. 7). As the forward movement of the shuttle assembly 46 and
gather 162 is continued, the previously stitched gather 110 is
moved away from the stitching station 48 to clear the stitching
station for the depositing of the gather 162. To this end, a pusher
head or section 166 on the gripper bar 106 is brought into
engagement with the trailing edge portion 116 of the gather 110
(see FIG. 8) to push the gather into the nip of a pair of input
rollers 170 and 172 (see FIG. 23) of the folder mechanism 60. The
input rollers 170 and 172 are operated at a relatively high speed
so that as the leading edge portion 124 of the gather 110 is
engaged by the rollers, the gather 110 is moved forwardly away from
the pusher head 166 of the shuttle assembly 46 in a manner shown
schematically in FIG. 9. Although the pusher head 166 is
advantageously formed as a part of the gripper bar 106, it is
contemplated that the pusher head or section could be connected to
other portions of the shuttle assembly 46.
A transversely adjustable upper guide member 176 (see FIGS. 1 and
2) cooperates with the upper edge portion of the gather 110 to
prevent the gather from cocking or tending to rotate as it is moved
forwardly by the pusher head 166 of the shuttle assembly 46. The
forward movement of the shuttle assembly is then continued from the
position shown in FIG. 9 through the position shown in FIG. 5 to
the position shown in FIG. 6 to locate the gather 162 with its
centerline along the stitch line 148. Of course, the gather 162 is
then saddle-stitched as the shuttle assembly completes its return
stroke to the pickup station 44 to engage the next succeeding
gather.
The saddle stitching of a gather 180 of relatively small sheets is
illustrated schematically in FIGS. 10--13 which correspond
generally to FIGS. 3--6 wherein the saddle stitching of a gather
110 of relatively large sheets is illustrated. With either of the
gathers 110 or 180, it is necessary during a saddle stitching
operation to position the gather under the stitcher assembly 56
with the center line of the gather in alignment with the stitch
line 148 of the stitcher assembly. To obtain this positioning of
the relatively small gather 180 relative to the stitch line 148,
the relationship between the collator conveyor 40 and the shuttle
assembly 46 is changed so that the gather 180 is positioned at the
pickup station 44 with the centerline of the relatively small
gather 180 in alignment with the centerline 114 of the pickup
station 44 when the gather 180 is clampingly engaged by the shuttle
assembly 46. Since the centerline of the relatively large gather
110 was also in alignment with the centerline 114 of the pickup
station 44 when the gather was engaged by the shuttle assembly 46,
the relationship between the collator conveyor 40 and shuttle
assembly must be adjusted when changing from relatively large
gathers to relatively small gathers so that the fingers 38 of the
collator conveyor 40 move the small gathers through a larger
distance to center the small gathers relative to the pickup station
44 before the shuttle assembly engages the small gathers. By having
the small gathers centered relative to the pickup station 44 when
they are engaged by the shuttle assembly 46, the centerlines of the
small gathers are in the same position relative to the gripper bar
106 of the shuttle assembly 46 as were the centerlines of the
relatively large gathers 110. Therefore, both the relatively small
and the relatively large gathers will be released at the stitching
station 48 by the shuttle assembly 46 with their centerlines
aligned with the stitch line 148 of the stitcher assembly 56.
To enable the relationship between the collator conveyor 40 and the
shuttle assembly 46 to be adjusted, the drive for the collator
conveyor 40 is connected to the drive for the shuttle assembly 46
by an adjustable coupling 184 which is best seen in FIG. 22. By
releasing the adjustable coupling 184, the relative positions
between each of the fingers 38 of the collator conveyor 40 and the
gripper bar 106 of the shuttle assembly 46 can be adjusted.
Therefore, when a finger 38 is pushing a relatively small gather
180, the finger advances the gather through a somewhat larger
distance before the shuttle assembly 46 engages the gather than
when moving the relatively large gather 110. The structure of the
adjustable coupling 184 will be more fully described subsequently
in connection with FIG. 22.
After the shuttle assembly 46 has clampingly engaged the relatively
small gather 180, the gather is moved forwardly through the
position shown in FIG. 11, past the registration finger 90, to the
position shown in FIG. 12. The gather 180 is then accelerated in
the reverse direction and released by the clamp assembly 46 to
enable the gather to engage the stop surface 134 of the
registration finger 90 in much the same manner as previously
explained in connection with the relatively large gather 110.
However, it should be noted that the registration finger 90 has
been moved downstream toward the stitcher assembly 56 from the
position in which it was located in FIGS. 3--6. Therefore, when a
trailing edge portion 188 of the gather 180 engages the
registration finger 90, the centerline of the relatively small
gather 180 is in alignment with the stitch line 148 of the stitcher
assembly 56 so that the stitcher heads 94 and 96 stitch the gather
180 along its center line. Thus by adjusting the position of the
registration finger 90 and the relationship between the shuttle
assembly 46 and collator conveyor 40, the binder assembly 30 can be
used to saddle stitch gathers of various sizes.
The side stitching of the first gather 192 of a series of gathers
is illustrated in FIGS. 14--17. When a gather is to be side
stitched, it is oriented with the front cover sheet upwardly and in
an upside-down position as viewed from a control panel 194 (FIGS. 1
and 2) of the binder assembly 30 so that the clinched ends of the
stitches or staples will be at the back of the gather. Before
beginning a side stitching operation, the relationship between the
shuttle assembly 46 and collator conveyor 40 is adjusted so that
the gather 192 is moved forwardly through a relatively large
distance by the finger 38 of the collator conveyor before the
gather is engaged by the shuttle assembly 46. This relatively large
movement of the gather 192 by the collator conveyor 40 is necessary
to position the gather with the sidestitch line of the gather in
alignment with the centerline 114 of the pickup station 44, as
shown in FIG. 14. As a result of positioning the sidestitch line of
the gather 192 in alignment with the centerline 114 of the pickup
station 44, the shuttle assembly 46 grips the gather 192 with the
sidestitch line in the same position relative to the gripper bar
106 of the shuttle assembly 46 as were the saddle stitch lines of
the gathers 110 and 180.
For a side stitching operation, the registration finger 90 is moved
downstream from position shown in FIGS. 10--13 so that it is
relatively close to the stitch line 148 of the stitcher assembly
56. The sidestitch line of the gather 192 will then be in alignment
with the stitch line 148 when a trailing edge portion 196 of the
gather is in engagement with the registration finger 90 (see FIG.
17). Thus, by adjusting the position of the registration finger 90
relative to the stitcher assembly 56 and by adjusting the
relationship between the shuttle assembly 46 and collator conveyor
40, the binder assembly 30 can be used to perform either saddle or
side stitching operations.
During a side stitching operation, the shuttle assembly 46
clampingly engages the gather 192 while traveling forwardly at
substantially the same speed as the speed at which the gather 192
is moving under the influence of the collator conveyor 40. The
drive mechanism 100 then accelerates the shuttle assembly 46 to
move the gather 192 away from the finger 38 of the collator
conveyor 40 and toward the stitching station 48 (see FIG. 15). As
the forward movement of the shuttle assembly 46 continues, it moves
the gather 192 past the registration finger 90 (FIG. 16) and then
reverses the direction of movement of the gather 192. The gather
192 is then released so that the momentum of the gather in the
reverse direction causes the trailing edge portion 196 of the
gather to engage the stop surface 134 of the registration finger
90. The gather 192 is then positioned for stitching by the stitcher
heads 94 and 96.
While the gather 192 is being stitched, the shuttle assembly 46
returns to the pickup station 44 to engage the next succeeding
gather 200 (see FIG. 18). As the shuttle assembly 46 begins its
next forward stroke, the pusher head 166 on the gripper arm 106
moves into engagement with the trailing edge portion 196 of the
previously side stitched gather 192. The leading edge portion 204
of the side stitched gather 192 is then pushed into engagement with
the input rollers 170 and 172 of the folder mechanism 60 by the
pusher head 166. Since the input rolls 170 and 172 of the folder 60
are operating at a relatively high speed, the stitched gather 192
is moved forwardly away from the pusher head 166 by the action of
the input rollers as the shuttle assembly 46 deposits the gather
200 at the stitching station 48. Since side-stitched gathers are
generally used in an unfolded condition, the folder mechanism 60 is
adjusted to bypass the side stitched gather 192 without folding it.
The manner in which the folder mechanism 60 is adjusted will be
more fully disclosed subsequently in connection with FIG. 23.
The binder assembly 30 can also be adjusted to perform corner
stitching operations. In a corner stitching operation a single
stitch or staple is used to interconnect the sheets of a gather
with the staple being located adjacent to a corner of the gather.
When the gathers are to be corner stitched, one of the stitcher
heads, that is the stitcher head 94, is disabled or removed from
the stitcher assembly 56. A single stitch or staple is then applied
to each of the gathers in turn by the stitcher head 96 which is
moved transversely of the support surface 36 so that is is located
near the corner of a gather which is to be stitched. The binder
assembly 30 is, in all other respects, operated during a corner
stitching operation in the same manner as previously explained for
a side stitching operation.
At the beginning of a forward stroke, the drive mechanism
accelerates the shuttle assembly 46 quickly to a substantially
constant operating speed which is approximately twice as great as
the constant speed at which the collator conveyor 40 is
continuously operated. At the end of the forward stroke, the drive
mechanism 100 reverses the direction of movement of the shuttle
assembly 46 and quickly accelerates the shuttle assembly to the
same operating speed in the reverse direction. By moving the
shuttle assembly at a relatively high constant speed for the
majority of the forward and reverse strokes, the drive mechanism
100 enables the shuttle assembly to complete both the forward and
reverse strokes before the next gather is moved to the pickup
station 44 by the collator conveyor 40 without accelerating the
shuttle assembly to extremely high peak velocities.
To provide the foregoing shuttle assembly drive characteristics,
the drive mechanism 100 includes an endless chain 210 (see FIGS. 1
and 21) which engages a drive sprocket 214 (FIG. 21) and an idler
sprocket 216. One of the links of the chain 210 is connected to the
shuttle assembly 46 by a pivotal connector assembly 220. Upon
rotation of the drive sprocket 214, the chain 210 is moved along a
continuous or circuitous path to reciprocate the connector assembly
220 relative to the support surface 36. This movement of the
connector assembly 220 results in the shuttle assembly 46 being
accelerated from substantially zero velocity at the beginning of
the forward stroke, indicated at 224 in FIG. 21, to a substantially
constant operating speed which is maintained as the shuttle
assembly moves between the points indicated at 226 and 228 of FIG.
21. The shuttle assembly is then decelerated until it reaches the
end of the forward stroke, at the point indicated at 230 in FIG.
21. Continued movement of the endless chain 210 initiates the
return or reverse stroke of the shuttle assembly which is
accelerated in the reverse direction to the substantially constant
operating speed, at the point indicated at 234 in FIG. 21. The
substantially constant operating speed of the shuttle assembly 46
is maintained until the shuttle assembly reaches the end portion of
the reverse stroke, at the point indicated at 238 in FIG. 21,
whereupon the shuttle assembly begins to decelerate until the end
of the reverse stroke is reached at the point indicated at 224.
The shuttle assembly 46 should be traveling forwardly at a speed
which is at least as great as the speed at which the gathers are
traveling under the influence of the collator conveyor 40 when the
shuttle assembly grips the gathers at the pickup station 44 to
prevent the gathers from being damaged by relative movement between
the finger 38 of the collator conveyor 40 and the shuttle assembly.
Accordingly, the shuttle assembly 46 firmly grips the gathers after
the shuttle assembly has been accelerated during the initial part
of its forward stroke. Thus, the shuttle assembly 46 firmly grips
the gathers when the connector assembly 220 is at a point indicated
at 244 in FIG. 21. The acceleration of both the shuttle assembly
and the gather is then continued until the shuttle assembly reaches
the substantially constant operating speed or velocity.
The shuttle assembly 46 releases the gather at the beginning of the
reverse stroke while the gather is moving in the reverse direction
toward the registration finger 90. Therefore, the shuttle assembly
46 is operated to release the gathers when the connector assembly
220 is at a point indicated generally at 248 in FIG. 21. The
shuttle assembly 46 remains in the open or released condition until
it approaches the end of the reverse stroke and the next forward
stroke is imminent. The shuttle assembly 46 then completes its
closing or gripping action on the next gather when the connector
assembly 200 reaches the point indicated at 244 in FIG. 21.
The control assembly 102 (see FIG. 1) is provided for operating and
the shuttle assembly 46 between the open or released condition and
the closed or clamping condition. The control assembly 102 is
operated by suitable cams to move an operating or actuating bar 250
to actuate the shuttle assembly from the closed condition to the
open condition. To this end, the actuator bar 250 extends parallel
to and is at least as long as the path of movement of the gathers
and is continuously engaged by a roller 252 as the shuttle assembly
is reciprocated along the support surface 36. The actuator bar 250
is fixedly connected by arms 256 and 258 to a support bar 260 which
is rotated or oscillated by the control assembly 102. Rotation or
oscillation of the support bar 260 pivots the actuator bar 250
about the support bar to force the roller 252 inwardly to thereby
operate the shuttle assembly to the open condition to release
gathers being transported by the shuttle assembly. The structure of
the shuttle assembly 46, the drive assembly 100 and the control
assembly 102 is generally similar to the structure disclosed in
application Ser. No. 727,097 filed by Victor A. Zugel on May 6,
1968 for "Shuttle Assembly." Therefore, it is believed that a
further description of these components of the binder assembly 30
is not necessary at this time.
The power for operating the drive mechanism 100, the stitcher
assembly 56 and the folder mechanism 60 is transmitted from a
collator drive shaft 270 (FIG. 22) through the adjustable coupling
184 to a drive shaft 274 which is connected by a suitable drive
train to the drive mechanism 100, the stitcher assembly 56 and the
folder mechanism 62. In order that the relationship between the
collator conveyor 40 and the shuttle assembly 46 can be varied
while maintaining substantially constant the relationship between
the shuttle assembly 46, the stitcher assembly 56 and folder
mechanism 60, the coupling 184 is releasable to allow relative
movement between the shafts 270 and 274. Accordingly, the collator
drive shaft 270 is drivingly connected to a cone 276 forming a part
of the coupling 184 by a drive train including a sprocket 278 which
is connected to the shaft 270, a sprocket 280 which is connected
with the cone 276, and an endless drive chain 282. Another cone 286
of the coupling 184 is connected to a sleeve 288 keyed to a
rotatable support shaft 290. The sleeve 288 is drivingly connected
with the shaft 274 by crown gears 292 and 294. The coupling 184
includes a split clamp 298 which can be loosened to allow the cone
sections 276 and 286 to be rotated relative to each other. Rotation
of the cone section 286 relative to the cone section 276 results in
the shaft 274 being rotated relative to the shaft 270 to effect an
adjustment of the relationship between the shuttle assembly 46 and
the fingers 38 of the collator conveyor 40. As was previously
explained, this adjustment of the relationship between the shuttle
assembly 46 and the collator conveyor 40 enables the binder
assembly 30 to be used for binding different sized gathers and for
performing both saddle stitching and side stitching operations.
When a desired relationship is achieved between the shuttle
assembly 46 and collator conveyor 40 by rotating the shaft 274
relative to the shaft 270, the split clamp assembly 298 is
tightened to interconnect the cone sections 276 and 286 of the
coupling 184 to maintain this relationship during the operation of
the binder assembly. In addition to transmitting power for
operating the shuttle drive mechanism 100, the stitcher assembly
56, and the folder mechanism 60, the coupling 184 transmits power
through the support shaft 290 to rotate cams of the control
assembly 102 so that the operation of the shuttle assembly 46 is in
a timed relationship with the position of the shuttle assembly
relative to the support surface 36. Of course, adjustable couplings
of a type other than the one shown in FIG. 22 could, if desired, be
used for drivingly interconnecting the collator conveyor 40 and the
shuttle assembly 46.
A Since the binder assembly 30 is selectively operable to either
saddle stitch gathers which are folded by the folder mechanism 60
along the stitch line or to side or corner stitch gathers which are
not folded after stitching, the folder mechanism 60 is adjustable
between a first or operating condition wherein gathers received
between the input rolls 170 and 172 are folded (see FIG. 23) and a
bypass or inoperative condition wherein the folder mechanism 60 is
inoperative for folding gathers. Accordingly, the folder mechanism
60 includes a buckle-fold deflector section 300 having a stop 302
which is engaged by the leading edge portion of a saddle-stitched
gather when the stitch line of the gather is adjacent to the input
rollers 170 and 172. Further rotation of the input rollers 170 and
172 causes the saddle-stitched gather to buckle or bend along the
stitch line. The gather then engages the nip between the input
roller 170 and a folding roller 306 which move the gather upwardly
toward a second set of folding rollers indicated at 308 and 310. A
deflector 314 is provided between the rolls 170 and 308 to guide
the movement of the folded gather. A second deflector 316 is
provided downstream from the folding rollers 308 and 310 for
guiding the folded gather into position relative to the trimming
knife 62 which trims the face of the folded gather.
Both corner and side stitched gathers are not folded but are
normally used in the flat condition in which they are stitched at
the stitching station 48. Therefore, the buckle-fold deflector 300
includes a pivotally mounted gate or blocking section 320 which is
pivoted downwardly from its normal or blocking position to a bypass
or inoperative position (shown in dashed lines) wherein the side
and corner stitched gathers pass through the folder mechanism 60 to
a receiving conveyor 324 without being folded. Thus when the gate
320 is in the bypass or inoperative position, the buckle-fold
deflector 300 is rendered inoperative and side or corner-stitched
gathers pass through the folder mechanism 60 without moving
downwardly against the adjustable stop 302 and being folded. The
general structure of the folder mechanism 60 is similar to that
shown in U.S. Pat. No. 2,747,189 to Fenimor for a "Pamphlet Forming
Machine." Therefore, a more complete disclosure of the folder
mechanism 60 is not set forth herein.
In view of the foregoing description, it can be seen that the
inline binder assembly 30 includes a flat sheet collator 32 having
a continuously operated conveyor 40 which transports flat unfolded
gathers to a pickup station 44. A reciprocatable shuttle assembly
46, that is a shuttle assembly capable of being reciprocated,
engages the gathers at the pickup station 44 and transfers them to
a stitching station 48. Since the collator 40 is continuously
operated without starting or stopping, the collator conveyor 40 can
be operated at a relatively high speed with the trailing edge
portion of the gathers maintained in registration by engagement
with the finger 38 of the collator conveyor. This registration is
maintained while the gathers are being transferred from the pickup
station 44 to the stitching station 48 by the clamping action of
the shuttle assembly 46. The gather is positioned relative to the
stitcher heads 94 and 96 at the stitching station 48 by a reverse
movement of the gather which causes a trailing edge portion of the
gather to engage the registration finger 90 to thereby consistently
effect proper registration of each of the gathers with the stitcher
assembly 56 while the binder assembly 30 is being operated at a
relatively high speed.
The gathers are stitched at the stitching station 56 along a stitch
line extending transversely to the support surface 36 and the path
of movement of the shuttle assembly 46. This manner of stitching
the gathers enables the binder assembly 30 to be used for saddle,
side and corner stitching. When the binder assembly is used for a
saddle stitching, the gathers are positioned with their centerlines
along the stitch line 148 of the stitching assembly 56. When the
gathers are side or corner stitched they are positioned with their
trailing edges closely adjacent to the stitch line 148 of the
stitching assembly 56.
Although the collator conveyor 40 is operated at a relatively high
speed, the shuttle assembly is operated at a still higher speed
which enables the shuttle assembly to accelerate a gather to the
shuttle assembly operating speed, deposit the gather at the
stitching station 48 while effecting registration of the gather
relative to the stitcher assembly 56 and return to the pickup
station while the collator conveyor 40 is moving the next
succeeding gather to the pickup station 44. The folder assembly 60
is operated at an even higher speed than is the shuttle assembly 46
to enable a stitched gather to be moved away from the shuttle
assembly 46 under the influence of input rollers of the folder
mechanism 60 as the stitched gather is being pushed from the
stitching station 48 into the folder mechanism 60 by the pusher
head 166 of the shuttle assembly.
* * * * *