U.S. patent number 3,741,451 [Application Number 05/103,620] was granted by the patent office on 1973-06-26 for burster apparatus.
This patent grant is currently assigned to The Standard Register Company. Invention is credited to Frank V. Parenti, Robert W. Staneck.
United States Patent |
3,741,451 |
Parenti , et al. |
June 26, 1973 |
BURSTER APPARATUS
Abstract
Burster apparatus for separating a continuous strip or web of
material into portions, or sheets or the like, the strip
customarily having spaced-apart score lines or the like, along
which separation occurs. The apparatus has a plurality of
spaced-apart pairs of rollers or cylinders. The spaced relationship
between pairs of rollers is adjustable. The rate of rotation of one
pair of rollers is different from the rate of rotation of a pair of
rollers which is adjacent thereto. One pair of rollers is movable
to a position adjacent another pair of rollers for the bursting of
a web consisting of short portions. Strip engagement means are
movable into and out of web engaging position. The engagement means
are of assistance in severance of certain types of webs. Resilient
auxiliary contact means are carried by at least one roller member
to assist in proper movement of a sheet or the like after
separation thereof from a web occurs.
Inventors: |
Parenti; Frank V. (Dayton,
OH), Staneck; Robert W. (Warren County, OH) |
Assignee: |
The Standard Register Company
(Dayton, OH)
|
Family
ID: |
22296125 |
Appl.
No.: |
05/103,620 |
Filed: |
January 4, 1971 |
Current U.S.
Class: |
225/100; 83/61;
83/260 |
Current CPC
Class: |
B65H
35/10 (20130101); Y10T 83/086 (20150401); Y10T
225/35 (20150401); Y10T 83/4589 (20150401) |
Current International
Class: |
B65H
35/10 (20060101); B65H 35/00 (20060101); B26f
003/02 () |
Field of
Search: |
;225/4,100
;83/260,261,269,61 |
References Cited
[Referenced By]
U.S. Patent Documents
Primary Examiner: Yost; Frank T.
Claims
The invention having thus been described, the following is
claimed:
1. Burster apparatus for operation upon a continuous strip
including:
a pair of juxtaposed cylindrical roll members which are rotatable
about parallel axes, each of the roll members being generally
circular in cross-section and having generally the same given
radius,
at least one of the roll members having a surface portion which has
a dimension from the axis of the roll member which is less than
said given radius, so that when the surface portion faces the other
roll member a space exists between the roll members and a portion
of a strip may freely move between the roll members, and without
gripping action upon the strip by the roll members, the roll
members being rotatable to a rotative position in which adjacent
portions of the roll members are arcuate and so close together that
a portion of a strip therebetween is firmly gripped by the roll
members,
a resilient member attached to each roll member which has said
surface portion, the resilient member having a part which extends
slightly from said surface portion so that when the surface portion
faces the other roll member, the resilient member lightly engages a
portion of a strip which is between the roll members for movement
of said portion of the strip with rotative movement of the roll
members.
2. The apparatus of claim 1 in which said surface portion is
substantially coplanar.
3. The apparatus of claim 1 in which the resilient member is an
annular member encompassing the roll member.
4. In web engagement apparatus of the type having a pair of
juxtaposed rolls, one roll of the pair of rolls having a restricted
surface portion which is spaced a lesser distance from the axis of
the roll than the dimension that other surface portions of the roll
are spaced from the axis thereof, there being a slight spacing
between the restricted surface portion of said roll and the other
roll when the restricted surface portion of said roll faces the
other roll,
the improvement comprising a resilient element carried by the said
one roll and extending slightly from said restricted surface
portion thereof so that when the restricted surface portion of said
one roll faces the other roll the resilient element is positioned
between the pair of rolls for engagement of a portion of a web
which is positioned between the rolls.
5. The apparatus of claim 4 in which the restricted surface portion
is substantially coplanar.
6. The apparatus of claim 4 in which the said roll which has a
restricted surface portion also has a peripheral groove, the
resilient element comprising an annular elasto-meric member within
the groove and extending therefrom at said coplanar portion, the
other roll also having a groove in alignment with the annular
elastomeric member.
7. The apparatus of claim 4 in which the resilient element
comprises an annular resilient member encompassing the roll which
has a coplanar portion.
8. Burster apparatus for flexible strip material comprising:
a gripper roll unit, including a first pair of juxtaposed parallel
roll members,
a burst roll unit, including a second pair of juxtaposed parallel
roll members, the burst roll unit being movable toward and away
from the gripper roll unit, the burst roll unit being movable to
juxtaposition with the gripper roll unit,
one of the roll members of the second pair of roll members having
an opening therein around the periphery thereof,
a resilient deflector finger pivotally movable within the opening
of said roll member, the deflector finger being movable about an
axis parallel to the axes of the second pair of roll members, the
deflector finger being movable to and from juxtaposition with the
other roll member of the second pair of roll members,
resilient means in engagement with the resilient deflector finger
and urging pivotal movement thereof in a direction away from said
other member of the second pair of roll members,
the resilient deflector finger having a portion which is engageable
with the gripper roll unit to pivotally move the resilient
deflector finger in a direction toward said other member of the
second pair of roll members when the burst roll unit and the
gripper roll unit are in juxtaposition, the resilient deflector
finger thus being positioned to deflect portions of material after
movement thereof between the second pair of juxtaposed parallel
roll members.
9. Burster apparatus for successively separating a continuous strip
of business forms along longitudinally spaced lines of cross
perforations, said apparatus comprising a first set of adjacent
roll members adapted to receive the strip therebetween, a second
set of adjacent roll members spaced from said first set of roll
members and adapted to receive the strip therebetween, means for
driving said first and second sets of roll members for feeding the
strip therebetween, said second set of roll members having a
peripheral speed greater than the peripheral speed of said first
set of roll members to effect separation of adjacent forms at each
line of cross perforations located between said sets of roll
members, a table member adjacent said second set of roll members
and adapted to support the separated forms being fed from said
second set of roll members, a table extension member slidably
mounted on said table member, and said table extension member being
movable between a position adjacent one of said roll members of
said second set of roll members and a position spaced from said one
roll member for accommodating forms of different types.
10. Burster apparatus for successively separating a continuous
strip of business forms along longitudinally spaced lines of cross
perforations, said apparatus comprising a first set of adjacent
roll members adapted to receive the strip therebetween, a second
set of adjacent roll members spaced from said first set of roll
members and adapted to receive the strip therebetween, means for
driving said first and second sets of roll members for feeding the
strip therebetween, said second set of roll members having a
peripheral speed greater than the peripheral speed of said first
set of roll members to effect separation of adjacent forms at each
line of cross perforations located between said sets of roll
members, means defining at least one peripheral groove within one
of said roll members of said second set of roll members, a
deflector member extending within said groove between said roll
members, means supporting said deflector member for pivotal
movement on an axis extending parallel to the axis of said second
set of roll members, and means for pivoting said deflector member
for accommodating forms of different types.
11. Burster apparatus for successively separating a continuous
strip of business forms along longitudinally spaced lines of cross
perforations, said apparatus comprising a first set of adjacent
roll members adapted to receive the strip therebetween, a second
set of adjacent roll members spaced from said first set of roll
members and adapted to receive the strip therebetween, means for
driving said first and second sets of roll members for feeding the
strip therebetween, said second set of roll members having a
peripheral speed greater than the peripheral speed of said first
set of roll members to effect separation of adjacent forms at each
line of cross perforations located between said sets of roll
members, means forming a support surface for receiving and
supporting the separated forms fed from said second set of roll
members, a jam detector member positioned above said support
surface adjacent said second set of roll members, means supporting
said jam detector member for pivotal movement upwardly from said
support surface in response to improper form formation on said
support surface, and means for controlling the operation of said
burster apparatus in response to pivotal movement of said jam
detector member.
12. Burster apparatus as defined in claim 11 including spring means
for counterbalancing said jam detector and tending to lift it away
from said support surface.
13. Burster apparatus for successively separating a continuous
strip of business forms along longitudinally spaced lines of cross
perforations, said apparatus comprising a first set of adjacent
roll members adapted to receive the strip therebetween, a second
set of adjacent roll members spaced from said first set of roll
members and adapted to receive the strip therebetween, means for
driving said first and second sets of roll members for feeding the
strip therebetween, said second set of roll members having a
peripheral speed greater than the peripheral speed of said first
set of roll members to effect separation of adjacent forms at each
line of cross perforations located between said sets of roll
members, means supporting at least one set of roll members for
linear movement as a unit relative to the other said set of roll
members, means for adjustably moving said one set of roll members
and including a rack and an engaging pinion, a flexible drive
member connected to rotate said pinion to effect movement of said
pinion along said rack in response to longitudinal movement of said
drive member, and means supported for rotation on a substantially
fixed axis for moving said drive member longitudinally to effect
adjustment of said second set of roll members.
14. Burster apparatus for successively separating a continuous
strip of business forms along longitudinally spaced lines of cross
perforations, said apparatus comprising a first set of adjacent
roll members adapted to receive the strip therebetween, a second
set of adjacent roll members spaced from said first set of roll
members and adapted to receive the strip therebetween, means for
driving said first and second sets of roll members for feeding the
strip therebetween, said second set of roll members having a
peripheral speed greater than the peripheral speed of said first
set of roll members to effect separation of adjacent forms at each
line of cross perforations located between said sets of roll
members, means supporting at least one set of roll members for
linear movement as a unit between a first position adjacent the
other said set of roll members, and a second position spaced from
said other set of roll members, means for adjustably moving said
one set of roll members between said first and second positions, a
plurality of laterally spaced wedge members positioned between said
first and second sets of roll members adjacent said first set of
roll members and adapted to engage the web, a plurality of
laterally spaced deflector members supported for movement adjacent
said second set of roll members, means for moving said deflector
members, and means supporting said wedge members for movement to a
retracted position to provide for moving said one set of roll
members to said first position and for moving said deflector
members.
15. Burster apparatus as defined in claim 14 wherein said deflector
members are pivoted in response to moving said one set of roll
members to said first position.
16. The apparatus of claim 14 wherein said means for moving said
one set of roll members, includes a rack member positioned
substantially normal to said roll members, a pinion in mesh with
said rack member and attached to the roll member supporting means,
a drive gear connected to said pinion for rotation therewith, an
elongated flexible drive member engaging the drive gear for
rotation thereof, and means positioned for rotation on a
substantially fixed axis for moving said flexible drive member
longitudinally.
17. Apparatus as defined in claim 14 wherein said wedge members are
supported for pivotal movement on the axis of one of said first set
of roll members.
Description
BACKGROUND OF THE INVENTION
Strip severance machines or bursters of various types have been
constructed. However, so far as is known, one or more objectionable
features have been found in each of the prior art machines.
It is an object of this invention to provide a strip severance or
burster apparatus which is capable of very rapid operation.
It is another object of this invention to provide such apparatus
which is capable of maintaining a web and portions thereof in
substantially straight line movement in the travel thereof through
the apparatus.
It is another object of this invention to provide such apparatus
which has pairs of rolls or roller members, the rate of rotation of
one pair of rollers being fixed with respect to the rate of
rotation of an adjacent pair of rollers, one pair of rollers being
relatively movable toward and away from an adjacent pair of
rollers, while the relative rotative positions of the rollers is
maintained.
It is another object of this invention to provide such apparatus
which includes web feed means, separate from the burster means.
Other objects and advantages reside in the construction of the
invention, combinations thereof, the method of manufacture, and the
mode of operation, as will become more apparent from the following
description.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 is a perspective exploded type of view, with parts broken
away and shown in section of burster apparatus of this
invention.
FIG. 2 is a diagrammatic view showing roller members and web feed
mechanism of this invention.
FIG. 3 is a diagrammatic view, similar to FIG. 2, showing the
roller members in another position of operation.
FIG. 4 is a diagrammatic view, similar to FIGS. 2 and 3, showing
the roller members in another position of operation.
FIG. 5 is a diagrammatic view, similar to FIGS. 2, 3, and 4,
showing the roller members in another position of operation.
FIG. 6 is an enlarged sectional view showing roller members and
associated elements in apparatus of this invention.
FIG. 7 is a plan view, drawn on a smaller scale than FIG. 1,
showing a typical web which is operated upon by the apparatus of
this invention when the roller members thereof are positioned as
shown in FIGS. 1 - 6 and 8.
FIG. 8 is a sectional view similar to FIG. 6 but showing the roller
members in another rotative position of operation.
FIG. 9 is a sectional view taken substantially on line 9 -- 9 of
FIG. 8.
FIG. 10 is a sectional view taken substantially on line 10 -- 10 of
FIG. 6.
FIG. 11 is a plan view similar to FIG. 7 but showing another type
of web structure which may be operated upon by apparatus of this
invention.
FIG. 12 is a sectional view similar to FIG. 6 but showing pairs of
roller members spaced closer together than in FIG. 6 for operation
upon a type of web structure such as illustrated in FIG. 11.
FIG. 13 is a sectional view similar to FIG. 12 showing the roller
members in a different rotative position of operation.
FIG. 14 is an elevational view taken substantially on line 14 -- 14
of FIG. 1, but on a larger scale than FIG. 1, with elements shown
in a different position of operation.
FIG. 15 is a fragmentary elevational view, drawn on a larger scale
than FIG. 14, and showing a portion of the mechanism thereof.
FIG. 16 is a sectional view, taken substantially on line 16 -- 16
of FIG. 15.
FIG. 17 is a sectional view, taken substantially on line 17 -- 17
of FIG. 15.
FIG. 18 is a sectional view taken substantially on line 18 -- 18 of
FIG. 15.
FIG. 19 is an elevational view, taken substantially on line 19 --
19 of FIG. 1.
FIG. 20 is a sectional view, taken substantially on line 20 -- 20
of FIG. 9, but drawn on a smaller scale.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT
Burster apparatus of this invention comprises a pair of
spaced-apart web feed devices 24 between which a continuous web 26
is disposed. The web 26 comprises a series of forms or sheets
separated by perforation or score lines 27. The web 26 may consist
of a single thickness or ply or a plurality of thicknesses or
plies. The web feed devices 24 may be of any suitable type, but
preferably, have movable pin elements, not shown, which are
positionable within apertures 28 at the edges of the web 26 for
movement thereof. The web feed devices 24 may be of the type
disclosed in pending Application Ser. No. 71,727, filed Sept. 14,
1970, entitled Pin Belt Mechanism for Movement of a Continuous
Strip. The web feed devices 24 are supported upon a drive shaft 32
and upon a support shaft 34.
Spaced from the web feed devices 24 are an upper gripper roll 38
and a lower gripper roll 40. The gripper rolls 38 and 40 are in
parallel juxtaposition. The upper gripper roll 38 is secured to a
shaft 42 for rotation therewith. The lower gripper roll 40 is
secured to a shaft 44 for rotation therewith. The shafts 42 and 44
are rotatably supported adjacent the ends thereof by a support
member 50 which is shown at the left part of FIG. 1 and a support
member 54 which is shown at the right part of FIG. 1.
A motor 56 of any suitable type is attached to the shaft 42, by any
suitable means, for rotation thereof. A gear 58 is attached to the
shaft 42 and is in meshed relationship with a gear 60 which is
attached to the shaft 44.
The shaft 42 extends through the support member 50 and has attached
thereto a gear 62 which is in meshed relationship with a gear 64
which is attached to a shaft 66 which is rotatably carried by any
suitable means such as the support member 50. Also attached to the
shaft 66 for rotation therewith is a bevel gear 68 which is in
meshed relationship with a bevel gear 70, which is carried by a
shaft 72. The shaft 72 may be polygonal in cross section or
splined, or the like. The shaft 72 is rotatably supported by
brackets 74 and 76, which are attached to the support member 50.
The shaft 72 also carries a bevel gear 80 which is movable axially
upon the shaft 72. The bevel gear 80 is in meshed relationship with
a bevel gear 82 which is attached to a shaft 84. The shaft 84 is
rotatably supported by a plate 86, shown in FIGS. 1 and 19, which
has rollers 88, shown in FIG. 19, which are supported upon a rail
90, which is attached to the support member 50. The shaft 84 also
supports a gear 92, which is in meshed relationship with a gear 94
which is supported by a shaft 114 which is supported by the plate
86. The shaft 114 extends through the plate 86 and has attached
thereto an upper burst roll 116. The gear 94 is in meshed
relationship with a gear 98 which is attached to a shaft 100 which
is supported by the plate 86. An idler gear 102 is in meshed
relationship with the gear 98 and a gear 104, which is attached to
a shaft 148 which extends through the plate 86.
The shaft 114 is also rotatably supported by a plate 120 which has
wheels 122 attached thereto which are rotatably supported upon a
rail 124. The plate 120 also has wheels 125 which engage the lower
surface of the rail 124, as illustrated in FIG. 15. The rail 124 is
attached to the support member 54.
The shaft 114 has attached thereto a gear 126 which is in meshed
relationship with a gear 128 which is attached to a shaft 130. The
shaft 130 is rotatably supported by the plate 120 and the plate 86.
The shaft 130 carries a burst roll 132 which is in juxtaposition
with the burst roll 116 and parallel thereto.
Adjacent the burst roll 116 and supported by the plates 86 and 120
is a rod 134, shown in FIGS. 6, 7, 12 and 13. A sleeve 136, which
is also shown in FIG. 1, encompasses the rod 134 and is pivotal
with respect thereto. Angularly shaped arm members 140 are attached
to the sleeve 136 and extend downwardly therefrom in a direction
away from the burst roll 116 and the burst roll 132, as shown in
FIGS. 1, 6, 8, 12 and 13. Each of the arms 140 has a lower end
portion which is normally spaced a small distance above a
substantially horizontal table 142, which extends to the right from
the burst rolls 116 and 132, as shown in FIGS. 1, 6, 8, 12 and 13.
Slidably supported upon the table 142 is an adjustable extension
144, shown in FIGS. 6, 12 and 13.
Attached to each of the arms 140 and extending toward the burst
roll 116 is a deflector member 145.
A spring member 143, shown in FIGS. 6, 8, 12 and 13, partially
encompasses the rod 134, and is attached to the rod 134 and to the
sleeve 136. The spring member 143 urges pivotal movement of the
sleeve 136 counterclockwise, as viewed in these figures.
Attached to the arm 140 which is adjacent the plate 86 is an
actuator finger 147 which engages a roller 149 at the end of a
switch finger 151 of a switch 153.
Disposed upon the table 142 are the upper portions of a plurality
of elongate continuous belts 146, which encompass the shaft 148 and
a shaft 150 for rotative movement thereby. The shafts 148 and 150
are rotatively supported by flanges 152 which are attached to the
table 142. One of the flanges 152 is joined to the plates 86 and
120 for movement therewith, as illustrated in FIG. 14. As stated
above, the shaft 148 extends through the support member 50 and has
the gear 98 attached thereto. Rotation of the gear 98 thus causes
rotation of the shaft 148. Flexible chains 156, or the like, on
either side of the table 142, encompass gear members 158 which are
attached to the shafts 148 and 150 for rotation of the shaft 150
with rotation of the shaft 148.
The table 142 adjacent and above the shaft 150 carries a rack 160
which has a pair of spaced-apart panels 162 extending normally
therefrom. The panels 162 are adjustably carried by the rack 160
for closer or greater spacing between the panels 162.
The gripper roll 38 and the gripper roll 40 may comprise a
plurality of spaced segments or each of these rolls may have
peripheral slots 166 therein as shown in FIG. 1. The slots 166 in
the roll 38 are in alignment with the slots 166 in the roll 40.
A plurality of tape housings 170 are supported by a bar 171, there
being one tape housing 170 adjacent each pair of slots 166. Each
tape housing 170 has a tape 172 extending therefrom. The bar 171 is
attached to the support members 50 and 54. Each tape 172 has a
coiled portion within its respective housing 170 and resilient
means within each housing 170 urges rotative movement of the coiled
portion for drawing the tape 172 into the housing. The end of each
tape 172 is attached to a bar 176 which is carried by the plates 86
and 120 and which is adjacent the burst roll 116 and substantially
parallel thereto.
Above the bar 176 and parallel thereto is a bar 178 which supports
a plurality of deflector fingers 180. The burst rolls 116 and 132
have spaced-apart aligned slots 182, shown in FIGS. 1 and 9, and
the deflector fingers 180 are disposed therewithin. The bar 178 is
pivotally carried by the plates 86 and 120, and a resilient member
183 urges counterclockwise pivotal movement thereof, as shown in
FIG. 6. The bar 178 has an engagement lug 184.
Below the gripper roll 40 is a rod 186 which is supported by the
support members 50 and 54. The rod 186 includes a spring, not
shown, which urges rotative movement thereof in a clockwise
direction as viewed in FIG. 6. Wrapped upon the rod 186 is a
flexible curtain-like member 190 which extends upwardly from the
rod 186 and over a stationary rod 192 and extends to a bar 194 to
which the end of the flexible curtain member is attached. The bar
194 is supported by the plates 86 and 120 adjacent the burst roll
132.
Below the bar 171 is a bar 198, shown in FIGS. 6, 8, 12 and 13,
which supports a plurality of support fingers 200, each of which is
disposed within a pair of the aligned slots 166 in the rolls 38 and
40.
The shaft 42, to which the roll 38 is attached also supports a pair
of brackets 204, there being one bracket 204 at each end of the
roll 38. Each bracket 204 is rotatable with respect to the shaft
42. A plunger 206 which is carried by the left bracket shown in
FIG. 1 is movable into a hole 208, in the support member 50, shown
in FIGS. 1, 6 and 8 or is movable into another hole, not shown, but
which retains the brackets 204 in the position shown in FIGS. 1, 6
and 8. The brackets 204 have attached thereto a rod 210 and a rod
212 which extend substantially parallel to the roll 38. The rods
210 and 212 have attached thereto a plurality of wedge blocks 214,
each of which has a stem 216 which is laterally adjustably movable
along the rods 210 and 212.
The gripper roll 38 is shown as having a reduced radius portion or
surface portion 220, which is shown as being coplanar, and a
reduced radius portion or surface portion 222, which is shown as
being coplanar. The coplanar portions or surfaces 220 and 222 are
at opposite parts of the roll 38, as illustrated in FIGS. 2 - 6, 8,
12 and 13. These same figures show that the burst roll 116 has a
plurality of contiguous reduced radius portions or surfaces, herein
shown as being coplanar portions or surfaces 224.
The burst rolls 116 and 132, as stated above, are provided with
annular slots 182, which have the deflector fingers 180 extending
therewithin. The burst roll 116 also has grooves 229, each of which
has a resilient or elastomeric element 230 therewithin. Preferably,
the element 230 is an annular body of elastomeric material which
tightly encompasses the roll 116, within each groove 229. Each
element 230 is in alignment with a groove 234 of the burst roll
132, as illustrated in FIG. 9. The elastomeric element 230 may
extend beyond the groove 229 only at the flat or coplanar portions
224, as shown in FIG. 20, or the elastomeric element may extend
very slightly from the groove 229 throughout the periphery of the
burst roll 116, as indicated in FIGS. 2 - 6, 8, 12 and 13.
Rotatably attached to the support member 54 in spaced relationship
are sprocket members 240 and 242. Rotatably attached to the plate
120 is a sprocket 244 and two adjacent idler wheels 246, as shown
in FIGS. 1, 14 and 15.
Rotatably attached to the support member 54 is a shaft 250 which
has secured thereto for rotation therewith a sprocket 252. A hand
wheel 253 is also attached to the shaft 250 for rotation thereof.
Adjacent the shaft 250, the support member 54 rotatably supports an
idler wheel 254. A continuous chain 255 or other flexible member
encompasses the sprockets 240, 242, 244 and 252. The chain 255
engages the idler wheels 246 and 254. The sprocket 244 is attached
to a shaft 260 which extends through the plate 120 and has attached
thereto a gear 262, which is in meshed relationship with an
elongate rack 264 which is supported by the support member 54 and
extends therealong. The shaft 260 also extends to a rack 266 which
is supported by the support member 50. A gear, not shown, is
similar to the gear 262 and is attached to the shaft 260 adjacent
the rack 266 and is in meshed relationship therewith.
Pedestals 270 are attached to the table 142 adjacent opposite sides
thereof and have a bar 272 attached thereto which extends across
the table 142. The bar 272 has a plurality of stems 274 attached
thereto and adjustably positionable therealong. Each stem 274
rotatably carries a guide disc 276.
OPERATION
Due to the fact that the burst rolls 116 and 132 are rotatably
supported by the plates 86 and 120, and due to the fact that the
plates 86 and 120 are movable along their respective support
members 50 and 54, the position of the burst rolls 116 and 132 may
be adjusted with respect to the gripper rolls 38 and 40. Such
adjustment is performed by rotative movement of the handwheel 253,
which causes rotation of the shaft 250, the sprocket 252 and the
chain 255. Rotative movement of the chain 255 causes rotative
movement of the sprocket 244, which rotates the shaft 260 and thus
rotates the gears 262 and causes travel of the gears 262 along the
racks 264 and 266. Thus, the plates 86 and 120 are moved along the
racks 264 and 266 so that the burst rolls 116 and 132 are
positioned as desired with respect to the gripper rolls 38 and 40.
FIGS. 1 and 14 show two different positions of the plate 120 with
respect to the handwheel 253.
When the position of the burst rolls 116 and 132 is changed with
respect to the position of the gripper rolls 38 and 40, the length
of the tapes 172 and the curtain 190 changes automatically. The
desired position of the burst rolls 116 and 132 with respect to the
gripper rolls 38 and 40 depends upon the length of the sheet or
form which is to be burst or separated from the web 26. The
perforation or score lines 27 extending across the web 26 separate
the web 26 into a series of sheets or forms which are individually
separated from the web 26 by apparatus of this invention, as the
apparatus operates upon the web 26 and separates the sheets from
the web in seriatim relationship.
FIG. 7 illustrates a typical continuous web 26 which is operated
upon by apparatus of this invention when the apparatus is adjusted
in the manner shown in FIGS. 6 and 8. The burst rolls 116 and 132
are adjusted with respect to the gripper rolls 38 and 40 so that
the spacing therebetween is approximately equal to the spacing
between adjacent score lines 27 of the web 26, as illustrated in
FIGS. 2 - 6 and 8.
The motor 56 is preferably adapted to cause operation of all of the
mechanism discussed above. However, other means for operation of
all or a portion of the mechanism may also be satisfactory. The web
feed devices 24, and any other feed mechanism, not shown, between
the web feed devices 24 and the gripper rolls 38 and 40, move the
web 26 from left to right as viewed in the figures of the drawings.
The web in its travel between the gripper rolls 38 and 40 and the
burst rolls 116 and 132 moves between the tapes 172 and the
flexible curtain 190. The gripper rolls 38 and 40 and the burst
rolls 116 and 132 are relatively rotatively positioned so that a
coplanar surface 220 or 222 of the roll 38 faces the gripper roll
40 at the same instant when a coplanar surface 224 of the burst
roll 116 faces the burst roll 132, as illustrated in FIG. 2. FIG. 2
shows the coplanar surface 222 facing the roll 40. Thus, the web
feed devices 24 may move the web between the gripper rolls 38 and
40 and between the burst rolls 116 and 132 without disturbance by
these rolls. If there is any tendency for lateral misalignment of
the web 26 during burst operation, such misalignment is corrected
by the web feed devices 24 as these devices 24 move the web 26
without pressure contact of the web 26 by the rolls 38, 40, 116 or
132.
The mechanism described is such that the burst rolls 116 and 132
rotatively move at a considerably higher rate than the gripper
rolls 38 and 40. For example, the burst rolls 116 and 132 may be
rotated at twice the rate that the gripper rolls 38 and 40 are
rotated.
As the gripper rolls 38 and 40 and the burst rolls 116 and 132
continue to rotate, the coplanar surface 222 moves from facing
relationship with the roll 40 and the web 26 is thus gripped by the
gripper rolls 38 and 40. Rotative movement of the burst rolls 116
and 132 is such that the coplanar surfaces 224 of the roll 116 are
then moved from facing relationship with the roll 132. Thus, at
that instant the burst rolls 116 and 132 grip the web 26, as well
as the gripper rolls 38 and 40, as illustrated in FIG. 3.
Then, due to the fact that the burst rolls 116 and 132 are rotating
at a rate greater than the rate of rotation of the gripper rolls 38
and 40, the portion of the web 26 which is between the burst rolls
116 and 132 and the gripper rolls 38 and 40 is pulled in tension.
As this tension action occurs, the portion of the web 26 between
the burst rolls 116 and 132, and the gripper rolls 38 and 40 is
pulled taut against the wedge blocks 214. When sufficient tension
force is exerted upon the portion of the web which is between the
gripper rolls 38 and 40 and the burst rolls 116 and 132, the
tension causes the web 26 to sever, as illustrated in FIG. 4, and a
sheet or form 26a is removed from the web 26. Preferably, bursting
action occurs when a perforation line 27 is adjacent the wedge
blocks 214. The sheet 26a is moved by the burst rolls 116 and 132
in a direction away from the remainder of the web 26.
In some situations, before the burst rolls 116 and 132 have moved
the sheet 26a from a position therebetween, the coplanar portions
224 of the roll 116 again move into facing relationship with the
roll 132 as illustrated in FIG. 5. In such rotative position of the
burst rolls 116 and 132 the burst rolls 116 and 132 would not cause
any forward movement of the sheet 26a. Therefore, the roll 116 is
provided with the elastomeric elements 230, one of which is shown
in FIGS. 9 and 20. The elastomeric element 230 very lightly engages
the sheet 26a and causes the sheet 26a to positively move
forwardly, as illustrated in FIGS. 5 and 9 and 20. The sheets 26a
thus are moved to the table 142 and are moved therealong by the
belts 146 to an upwardly extending stack S at the right hand
portion of the apparatus, as viewed in FIG. 1. The guide plates 276
cooperate with the belts 146 in the movement of the sheets 26a to
the stack S thereof.
After severance occurs, the gripper rolls 38 and 40 and the web
feed devices 24 continue to move the web 26 toward the burst rolls
116 and 132, as illustrated in FIG. 4.
FIG. 11 shows another typical continuous web 326 which may be
operated upon by the apparatus of this invention. The continuous
web 326 may be a card stock or paper stock web and may comprise a
series of tabulator cards, or the like, 326a which are attached in
series relationship by means of a stub 330 which has score lines or
perforation lines 332.
For operation upon a web such as the web 326 of FIG. 11, the burst
rolls 116 and 132 are moved close to the gripper rolls 38 and 40,
as shown in FIG. 12. Before this occurs, the wedge blocks 214 are
moved out of the normal position shown in FIGS. 6 and 8, which is
between the gripper rolls 38 and 40 and the burst rolls 116 and
132, to a position above the gripper roll 38, as illustrated in
FIG. 12. In such movement of the wedge blocks 214, the plunger 206
is withdrawn from the hole in the support member 50 and the
brackets 204 are then pivotally moved about the shaft 42 to a
position in which the plunger 206 is movable into the hole 208 in
the support member 50.
Thus, the wedge blocks 214 are positioned as shown in FIGS. 12 and
13. In such position the lug 184 engages the support member 50 and
the bar 178 is pivotally moved in a clockwise direction. Thus, the
deflector fingers 180 are moved downwardly toward the roll 132.
The extension 144 is moved in a direction away from the roll 132.
Thus, the stubs 330 which are separated during the burst operation
fall downwardly between the extension 144 and the burst roll 132,
as illustrated in FIG. 13. The larger sheets or cards 326 move to
the table 142, as illustrated in FIG. 12.
If, for some reason, the sheets 26a or the cards or sheets 326a
should not move properly along the table 142 and a build-up thereof
should occur, the arms 140 are lifted by such sheets or cards and
the sleeve 136 is pivotally moved upon the rod 134. The spring or
resilient member 143 assists in such pivotal movement. Therefore,
the arms 140 are very sensitive to such build-up. When the sleeve
136 is pivotally moved, the actuator 147 is moved. Thus, the switch
153 is operated. By this means, control mechanisms may cause
deenergization of the motor 56 and operation of the apparatus
ceases.
Although the preferred embodiment of the device has been described,
it will be understood that within the purview of this invention
various changes may be made in the form, details, proportion and
arrangement of parts, the combination thereof and mode of
operations, which generally stated consist in a device capable of
carrying out the objects set forth, as disclosed and defined in the
appended claims.
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