U.S. patent number 3,558,071 [Application Number 04/817,791] was granted by the patent office on 1971-01-26 for cutter for sheet winder.
This patent grant is currently assigned to Eddystone Machinery Company. Invention is credited to William Russell Clark.
United States Patent |
3,558,071 |
Clark |
January 26, 1971 |
CUTTER FOR SHEET WINDER
Abstract
A cutter for a winder for sheet material having a cutter frame
provided with a track at the top, cutters in the track, one or
preferably both being supported on a set of rollers which engage in
longitudinal slots in the cutters, the cutters relatively
reciprocating. In the preferred form both cutters float on their
rollers free from engagement with the bottom of the track.
Inventors: |
Clark; William Russell
(Jenkintown, PA) |
Assignee: |
Eddystone Machinery Company
(Chester, PA)
|
Family
ID: |
25223893 |
Appl.
No.: |
04/817,791 |
Filed: |
April 21, 1969 |
Current U.S.
Class: |
242/527.5;
242/533.2; 242/542 |
Current CPC
Class: |
B22F
9/08 (20130101); D06H 7/02 (20130101) |
Current International
Class: |
B22F
9/08 (20060101); D06H 7/02 (20060101); D06H
7/00 (20060101); B65h 019/20 () |
Field of
Search: |
;242/56,56.6 ;83/381
;156/353 |
References Cited
[Referenced By]
U.S. Patent Documents
Primary Examiner: Christian; Leonard D.
Claims
I claim:
1. In a winder for sheet material, spaced parallel horizontal
drums, means for turning the drums in the same direction for
winding a roll of sheet material thereon, the sheet material in one
position of winding extending across between the drums, and a
cutter frame in the space between the drums, guided for upward
motion to cut the sheet material, means for moving the cutter frame
upward, in combination with a track having opposed parallel sides
extending horizontally on the top of the cutter frame and
vertically movable with it, roller pivots extending from the track
into the space between the track sides, rollers on the roller
pivots in the space between the track sides, opposed cutters in the
track and each engaging one of the track sides, at least one of
said cutters having slots receiving rollers, said one cutter being
reciprocable longitudinally on the rollers, the rollers on which
said one cutter reciprocates clearing from engagement with the
other cutter, and an eccentric operatively connected to said one
cutter to reciprocate the same.
2. A winder of claim 1, in which each cutter has slots receiving
rollers of a different set, each cutter being reciprocated
longitudinally on the rollers of a different set and the rollers on
which each cutter reciprocates clearing from engagement with the
other cutter, there being an eccentric operatively connected to
each cutter to reciprocate the same.
3. A winder of claim 2, in combination with gears interconnecting
the eccentrics.
4. A winder of claim 3, in which the roller pivots extend across
from side to side of the track, there being slots in each cutter
passing the roller pivots opposite the rollers on which the other
cutter reciprocates.
5. A winder of claim 4, in which the cutters float vertically on
the rollers, free from engagement with the bottom of the track.
6. A winder of claim 1, in which said one cutter floats vertically
on the rollers, free from engagement with the bottom of the track.
Description
DISCLOSURE OF INVENTION
The present invention relates to a winder for sheet material,
particularly cloth, plastic or paper, provided with an improved
cutter.
A purpose of the invention is to accomplish cutting more rapidly
and with less damage to either of the cut ends of the sheet
material.
A further purpose is to cause more even cutting.
A further purpose is to produce less retardation on the cut end of
the sheet material as it is being wrapped around the new shell, and
thus produce a more uniform roll of sheet material.
A further purpose is to reduce the cost of cutters for sheet
material and reduce the cost of sharpening such cutters.
A further purpose is to permit subdividing a very long cutter into
a series of sets of reciprocating cutters, making the division or
divisions at the middle of the cutter or at some other suitable
point or points along its length.
Further purposes appear in the specification and in the claims.
FIG. 1 is a diagrammatic longitudinal vertical section of a winder
for sheet material according to the invention, the section being
taken just inside the frame at one end.
FIG. 2 is a fragmentary side elevation of the cutter frame and
cutter frame drive in retracted position, with the gears sectioned
away.
FIG. 3 is a diagrammatic section of FIG. 2 on the line 3-3.
FIG. 4 is an enlarged diagrammatic section taken on the line 4-4 of
FIG. 8 and including the gate which is omitted in FIG. 8.
FIG. 5 is an end elevation of the cutter guides and cutters.
FIG. 6 is a fragmentary enlarged section on the line 6-6 of FIG.
2.
FIG. 7 is an enlarged fragmentary section on the line 7-7 of FIG.
2.
FIG. 8 is a fragmentary side elevation of cutters in the cutter
guide, with the gears sectioned away, showing the relation of the
eccentrics to individual cutters.
In the prior art, winders for sheet material such as cloth, plastic
and paper are of the two-drum type, as shown for example by U.S.
Pat. No. 2,676,764 by Aulen, granted Apr. 27, 1954 for Web Winder;
U.S. Pat. No. 2,619,298 Aulen, granted Nov. 25, 1952 for Web
Winder; U.S. Pat. No. 3,061,221 by Aulen granted Oct. 30, 1962 for
Winding Machine; the three-drum type as shown by U.S. Pat. No.
3,045,940 by Aulen granted July 24, 1962 for Three-Drum Winder, or
the center wind type.
The cutters used for cutting the sheet material when a new roll is
to be formed are often of the longitudinally extending serrated
knife variety as U.S. Pat. No. 2,619,298 in Aulen above referred
to, or of the circular disc variety as shown U.S. Pat. No.
2,723,717 by Clark and Aulen granted Nov. 15, 1955 for Movable Gate
Carrying Rotary Knife for Cutting Cloth on a Winding Machine. In
the case of the serrated knife, the cutter is longitudinally
stationary and merely moves up and down but in the case of the
circular disc cutters, the cutters are rotated when cutting takes
place. Another form of cutter is like a chain saw as shown U.S.
Pat. No. 3,049,311 by Birch granted Aug. 14, 1962 for Apparatus for
Web Winding.
The above cutters when wholly stationary except for the vertical
motion tend sometimes to grab the cloth and produce an irregular
tear in the cloth, and sometimes will not even cut at all. In some
cases when the material is not cut, the cutting frame may be bent.
This partly because there is no horizontal motion of the
cutters.
The rotating disc type of cutter cuts faster but the discs are very
expensive to produce. The chain saw type of cutter has extensive
power requirements partly for overcoming friction in the chain, and
must rise rapidly in order to be effective, and has a tendency to
tear certain materials.
The present invention is designed to produce very fast cutting,
thus minimizing the horizontal pull of the cutting frame by the
material and cutting more evenly because of the unlikelihood of
producing streamers or ragged ends.
The cutter of the invention has very moderate power consumption
because of the antifriction support of the cutters themselves by
the track.
In the present invention the cutters are in themselves of low cost,
and their sharpening can be accomplished in an economical manner.
The cutters of the present invention are readily replaced by others
when they become worn or need sharpening.
The invention can be applied to a single set of cutters extending
clear across the winder or the cutters can be broken down into
units, one set covering half or one portion of the width and
another set or other sets covering another half or another portion
or other portions of the width, the cutters of the sets being
driven from separate drives or intergeared or connected to a common
drive.
While the invention is applicable to two-drum or three-drum
winders, it will be illustrated conveniently as applied to a
three-drum winder. The invention may be applied to peripheral or
center winders.
It will be understood that the winder may be used for winding
cloth, plastic, paper, foil, or other sheet material.
The winder as conveniently illustrated comprises a frame 20 having
three parallel horizontal shafts 21, 22 and 23, each of which is
driven in the same direction by suitable driving means. The shaft
21 is supported in the frame by suitable bearings and has keyed
thereon a horizontal entering drum 24. The shaft 22 is journaled in
the frame on suitable bearings and has keyed thereon a horizontal
middle drum 25. The shaft 23 is journaled on the frame in suitable
bearings and has keyed thereon a horizontal takeoff drum 26. A
suitable driving interconnection is provided between the drums. The
takeoff drum will suitably be lower then the entering drum and the
middle drum in the preferred embodiment. The winding machine above
the entering drum has upwardly moving receiving pivot jaws 27 which
are downwardly urged by piston and piston rod combinations 28 in
pneumatic cylinders 30 supported at the sides in the frame. The
upwardly moving receiving pivot jaws 27 pivotally support the pivot
of the spitz bar of a new shell 31.
Between the entering and the middle drum there are at the sides of
the machine suitable guideways 32 guide a cutter frame or gate 33
which has at its upper ends cutters 34 inclined toward the
direction from which the sheet material comes and also threading
fingers 35 as well known in the art. The guideways 32 are
preferably slightly inclined toward the direction from which the
sheet material comes.
A track 36, FIG. 5, is mounted on the top of the cutter frame and
has opposed sides 37 and 38 and a bottom 40 held together by
suitable fastenings, which may be in the form of screws or pins 41,
FIGS. 4 and 8. Each of the cutters 34 may desirably be identical
but positioned oppositely, so that one cutter engages one side of
the track and the other cutter engages the other side of the track
while the cutters engage one another sideways at the middle of the
track cross section,
Each of the cutters 34 has near each end one or preferably a
plurality of elongated roller slots 42, FIG. 8, and opposite the
roller slots of the opposite cutter a set of elongated somewhat
higher roller clearance slots 43. At the locations of the roller
slots 42 of each cutter a roller pivot pin 44, FIGS. 4 and 8,
extends across the track. The pin has a small end passing through a
small opening 45 in one side of the track, has an intermediate head
44' engaged in an opening 45' through the opposite side of the
track, and has an enlarged head 44.sup.2 passing through an opening
45.sup.2 in the structure of the cutter frame or gate. The pin is
held in place by a snap washer 47 engaging in a suitable annular
slot in the pin. On the small end of the pin an antifriction roller
48, suitably a ball bearing roller, is supported, provided with an
inner race and an outer race, the inner race being held between one
of the tracks at one side and the head portion 44' at the other
side.
In the preferred embodiment, as seen in FIG. 4, each of the cutters
clears from the bottom 40 of the track as shown at 53, there being
a slight vertical freedom in the roller guiding slot so that the
cutter moves back and forth resting on the top of the roller as
shown at 54 with slight clearance from the bottom of the roller as
shown at 55, the opposite cutter clearing entirely from the roller
48 which is supporting the particular cutter under discussion.
Since the cutters will in the preferred embodiment be moving
oppositely to one another, it is important that each cutter be
supported and in effect floating on one set of rollers while the
other cutter is supported and floated on the other set of rollers
with clearance at the roller clearance slots.
The cutters are conveniently serrated at 56, FIG. 8, and have
points 57 which are close together when viewed in cross
section.
At a suitable point, conveniently the middle, each cutter has an
eccentric engaging slot 60 and adjoining thereto an eccentric
clearance slot 61 for clearing the opposite eccentric. Eccentric
shafts 62 and 63 (FIGS. 2, 3 and 8) have at opposite sides axial
antifriction (ball) bearings 64 and 65 which are mounted in
opposite sides of a track housing 66 and 67 supported on the track,
and journal concentric shaft portions 68 and 70. Between the
concentric shaft portions there is an eccentric portion 71 which
pivotally supports an eccentric antifriction roller 72 desirably in
the form of a ball bearing. The outer race of this ball bearing
engages the sides of the slot 60 of the cutter to reciprocate the
cutter back and forth while the ball bearing on the other eccentric
to manipulate the other cutter is provided with clearance by its
corresponding slot 61.
The concentric portion 68 of each eccentric has keyed thereon a
gear 73 which is held at the outer end by a snap washer 74 engaging
in a corresponding slot. The gears 73 interconnect the eccentrics
for the cooperating cutters and move the cutters simultaneously in
opposite directions.
On one of the eccentric shafts there is provided an extension 75 of
the axial portion and on this extension is provided a bearing 76 on
which turns an inner link 77. The bearing has a flange 78 which
engages the inner end of a sprocket 80 keyed on the shaft extension
75 and having a hub portion 81 which is surrounded by a bearing 82
which journals an outer coaxial link 83 held in place by a washer
84 and a snap-in washer 85 engaging in a cooperating groove in the
outer end of the eccentric shaft.
The cooperating inner and outer links at the lower end interconnect
with inclined links 110 and 111 which pivot on a bolt 103.
Links 77 and 83 at their opposite ends pivot on bolt 103 which
receives a bearing 105 surrounded by a spacer 106 journaling the
link 77. At the other end the bolt 103 has a bearing 107 surrounded
by a spacer 108 which journals the link 83 (FIG. 7).
Immediately surrounding the bolt 103 there are links 110 and 111
which extend to the drive motor shaft to be described. Between
links 110 and 111 a spacer 112 surrounds the bolt 103, and
journaling on this is a bearing 113 on which turns a double
sprocket 114. The smaller sprocket side of this double sprocket 114
interconnects by a chain 102 with the sprocket 80. The links 110
and 111 at their opposite ends surrounds shaft 116 of electrical
drive motor 117 suitably mounted on the frame of the winder. The
shaft has a shoulder 118 engaged by a washer 120. It has a keyway
and a key 121 which rotationally secures to the shaft a sprocket
hub 122 having a key locking set screw 123 (FIG. 6).
A sprocket 124 is fastened to the hub 122. The hub at opposite ends
receives a bearing 125 for link 111 and a bearing 126 for link 110.
Adjoining the hub and bearing 126 is a collar 127 held in place by
a set screw. A chain 130 interconnects sprocket 124 with a larger
diameter sprocket of the double sprocket 114.
It will thus be evident that whether the cutters are in lower or
raised position, they can be driven by shaft 116 of the drive
motor, driving sprocket 124 and chain 130 which drives the larger
sprocket teeth on the double idling sprocket 114. The smaller
diameter sprocket on the double sprocket 114 drives chain 102 which
interconnects with sprocket 80 on one of the eccentric shafts. This
drives that particular eccentric to reciprocate that particular
cutter and through gears 73 drives the opposite eccentric shaft to
reciprocate the opposite cutter oppositely. The cutter frame is
raised by a fluid cylinder 129, FIG. 1, on the machine frame
operating a piston and rod combination 129' (FIG. 2). Although the
cylinder 129 will usually be in the middle, the drive is effective
even though it is on one side.
While the sheet material is winding on the takeoff drum and the
middle drum, a new shell is placed in the jaws above the entering
drum and turns with the entering drum just prior to cutting. This
new shell can be inserted manually or on a track as well known in
the art. At the time of cutting, the gate or cutter frame 33 rises
with the cutters in reciprocating motion opposite to one another,
supported at opposite ends by their rollers 48, and preferably
floating on the rollers and free from engagement with the bottom of
the cutter track. The threading fingers, as well known, carry the
forward cut end around the new shell.
The roll 31' then winds as in conventional winding practice on the
entering drum until it increases in size and is ready for transfer.
Transfer to the takeoff and middle drum is preferably made by
transfer arms 103 pivoted on shaft 104 on the frame extending down
to a position below the pivot ends 31 of the shell. The transfer
arms 103 can be manually manipulated by a lever or the like or can
be operated, as for example, by a pneumatic cylinder, not shown. As
the roll moves forward to a position above the middle drum, the
roll pivots come in contact with letdown arms 104 which are pivoted
on shaft 22 and operated pneumatically. If desired, support rails
99 for the pivots of the shell as it is transferred above the knife
can be provided, pivoted at 99' and movable vertically by any
suitable means, preferably a fluid cylinder, at the ends toward the
entering drum. Pneumatic cylinder 107 pivoted on the frame at 108
has a piston and rod combination 110 which is pivotally connected
at 111 with lever 112 keyed on shaft 113 journaled on the frame at
114. The shaft 113 also has keyed thereon at opposite ends levers
115 which are pivotally connected at 116 to adjustable links 117
which pivotally connect at 118 to intermediate positions on the
letdown arms 104.
When the letdown arms have completed their operation, the rolls
31.sup.2 rests against and turns with the takeoff drum 26 and the
middle drum 25. In this position, pivot jaws 120 sliding in
guideways 121 which extend diagonally upwardly and forwardly at the
front of the machine may engage the pivot ends of the roll. Each of
the pivot jaws is either upwardly or downwardly urged by a piston
rod 122 which has a piston acting in a pneumatic cylinder 123 which
is pivoted on the frame at 124. It will be evident that the
location of the pivots with respect to the jaw will be changed when
the pressure is upward rather than downward.
When the cloth roll 31.sup.2 is wound to a size suitable for
doffing, it has, of course, pushed the pivot jaws 120 up along the
guideways 121 against or with the action of the cylinders. At this
point, cutting is accomplished as already explained. In order to
doff and load the cloth roll on a truck, hoist or the like, a
doffing roll 125 is actuated which is placed below the roll of
cloth, and is pivoted on an axis 126 parallel to the axis of the
roll of cloth on bearing supports 127 which are mounted on piston
rods 128 connected with pistons acting in pneumatic cylinders 130
on the frame. The jaws 120 must be raised at the time of
doffing.
It will be evident that the use of the cutting device of the
invention has the advantage of producing faster cutting, and more
even cutting, and providing blades which can be produced less
expensively, sharpened at lower coast, and replaced very
easily.
It will be evident that the motor 117 can, if desired, drive more
than one idler shaft 116 when more than one cutter unit is required
because of the width of the winding machine.
It will be evident that the construction of the cutters will be
subject to variation to most efficiently cut various types of
material. The particular shape of cutter used will depend upon the
thickness, strength and texture of the material.
In view of my invention and disclosure, variations and
modifications to meet individual whim or particular need will
doubtless become evident to others skilled in the art to obtain all
or part of the benefits of my invention without copying the
structure shown, and I, therefore, claim all such insofar as they
fall within the reasonable spirit and scope of my claims.
* * * * *