Патент USA US3465639

Sept. 9, 1969
F. T. BILEK
3,465,632
PAPER CUTTER FOR FACSIMILE MACHINE
Filed Nov. 8, 1966
5 Sheets-Sheet 1
Sept. 9, 1969
F. T. BILEK
3,465,632
- PAPER CUTTER FOR FACSIMILE MACHINE
Filed Nov. 8, 1966
5 Sheets-Sheet 2
Sept. 9, 1969
F. T. BILEK
_
3,465,632
PAPER CUTTER FOR FACSIMILE MACHINE
Filed Nov. 8, 1966
5 Sheets-Sheet 5
United States Patent 0 " "me
3,465,632
Patented Sept. 9, 1969
2
1
best mode which has been contemplated of applying that
3,465,632
PAPER CUTTER FOR FACSIMILE MACHINE
Frank Thomas Bilek, Downers Grove, Ill., assignor to
Stewart-Warner Corporation, Chicago, 11]., a corpora
tion of Virginia
Filed Nov. 8, 1966, Ser. No. 592,809
principle.
In the drawings:
FIGURE 1 is a front perspective view of a facsimile
machine employing the improved paper cutter of the
present invention.
FIGURE 2 is a rear perspective view of the paper
cutter shown in FIGURE 1.
FIGURE 3 is a perspective view of a portion of the
10 paper cutter of FIGURE 1 showing the manner of angular
adjustment of the relatively ?xed upper cutting blade.
ABSTRACT OF THE DISCLOSURE
FIGURE 4 is a rear elevational view of the improved
A paper cutter for transversely cutting paper stock in
paper cutter of the present invention.
web form in which a movable blade is caused to move
FIGURE 5 is a side elevational view of the paper
with respect to the ?xed blade so as to draw the paper into 15 cutter shown in FIGURE 4 taken about lines 5-~5.
the point of intersection of the blades.
FIGURE 6 is a schematic diagram of the electrical
circuit associated with the improved paper cutter of the
Int. Cl. B26d 5/08
US. Cl. 83-555
8 Claims
present invention.
In general, the apparatus of the present invention com
This invention relates to web cutting and more par
ticularly, to an improved cutter for cutting a moist paper 20 prises an improved paper cutter for transversely cutting
paper stock in web form including a ?rst longitudinally
strip being fed through a facsimile machine.
extending ?xed blade and a second longitudinally extend
Facsimile machines incorporate, in general, a large
roll of paper in web form which is fed through the -
ing movable blade spaced therefrom. An elongated web
is positioned between said blades for cutting. Means are
machine to provide the necessary copy surface during
facsimile reproduction. If the facsimile machine employs 25 provided for initially moving one end of the second blade
predominantly vertically and the other end of the second
a wet reproduction process, the web or strip at the time
blade predominantly horizontally to achieve blade edge
of severance is moist. In theipast, such facsimile machines
overlap and for thereafter moving said one end of said
have been provided with manual or automatic cutting
blade predominantly horizontally and the other end
devices for severing the Web into various length strips
depending upon the extent of material being reproduced 30 vertically tending to move the web into the nip area be
tween the blades asgthe nip area proceeds transversely
or copied. The cutting or severing apparatus normally
across the web during the cutting stroke.
incorporates a pair of relatively movable shearing blades,
In a preferred form, the upper longitudinally extend
one of which may be ?xed and the other of which may
ing blade is ?xed with the blade surface extending hori
be moved to elfect a desired cutting action. It has been
found that shearing of the web is enhanced if the shearing 35 zontally and the lower blade is supported in a slightly
proceeds across the web from one edge to the other.
inclined position by spaced, double pivot mounting arms.
The ?rst pivot arm, which supports the higher end of the
inclined lower blade, is initially in a generally horizontal
pivoted at one end in conventional scissors fashion, with
position while the second pivot arm supporting the lower
the point of blade overlap moving longitudinally of the
end of the inclined lower blade is initially vertically
cutting blades from one side of the blade assembly to
oriented. One of the link members is oscillated about its
the other. Thus, the shearing action on the interposed
?xed axis to achieve the desired cutting stroke, causing
web of material progresses transversely across the strip
the lower blade to move upwardly and overlap slightly
at right angles to the longitudinal axis of the web itself.
the longitudinal cutting edge of the ?xed upper blade.
In this case, the shearing eifect itself tends to push the
Turning to the drawings, there is shown at 10 a fac
uncut web away from the area of nip between the ad 45
simile machine of conventional construction which com
vancing blades. The tendency for the web to move away
prises a rectangular cabinet member 12 including a front
from the cutting action may not be detrimental when
door or like member 14 which may be readily opened by
cutting a dry web, but when used in a wet copy facsimile
means of handle 16 to allow the operator to have access
environment, there is a tendency not only to provide a
ragged cut, but in addition, the web tends to roll or bunch r to the machine interior. The improved paper cutter, indi
cated generally at 18, is supported on the upper surface
in the nip area.
20 of the cabinet member, principally by means of a base
It is, therefore, a primary object of this invention to
plate 22 including a pair of frontal base sections 23. The
provide an improved web cutter for transversely cutting
improved paper cutter of this invention, while advan
elongated web stock which prevents the normal tendency
tageously employed with the facsimile machine 10, has
of the web to jam in response to the cutting action.
general application to all ?elds involving the transverse
It is a further object of this invention to provide an
Cutting apparatus normally comprise a pair of blades,
improved web cutter in which the movement of the
cutting blades during the cutting stroke tends to move the
web material into the nip area between the relatively
moving blades.
.
It is a further object of this invention to provide an
improved web cutter which ensures a clean transverse
cut regardless of the moisture content of the web stock
being severed.
cutting of web material. In this case, paper Web 24 carried
on a roll (not shown) exits from the facsimile machine
section and moves upwardly and to the rear of the appa
ratus, as indicated generally by arrow 26. The facsimile
machine 10 utilizes a Wet reproduction process such that
the web 24 leaving the facsimile area is moist as it passes
through the paper cutter 18.
Fixed to the base member 22 of the cutter at approxi
It is a further object of this invention to provide an 65 mately the center thereof and extending transversely
across the cutter is a main vertical support member 44
improved web cutter of this type in which the amount
which includes a major central cut-out area 45 through
of blade overlap and surface contact between the rela
which passes web 24 as it is directed rearwardly of the
tively moving blades may be easily and readily adjusted. .
machine. A left-hand side wall 42 provides rigidity to
Other objects of this invention will be pointed out in
the following detailed description and claims and illus 70 the cutter having one edge coupled to the left-hand edge
of transverse Wall 44 and a lower edge coupled to the
trated in the accompanying drawings which disclose, by
left-hand frontal base section 23. In like manner, on the
way of example, the principle of the invention and the
3
3,465,632
4
right-hand side of the machine (FIGURE 1), a vertical
127. Slide member 118, carried by the stationary frame
side wall 58 is coupled to the frontal base section 23 and
of the machine, is pulled away from wall 90 against the
to the transversely extending wall 44 at the rear edge
bias of spring 120, whereupon the eccentric cam member
thereof. The frontal base section 23 extends transversely
128 is loosened and rotated about its axis to increase or
of the machine only a short distance providing, within
decrease the radial extent of its peripheral surface with
01
cutter 18, a frontal base opening 25 which easily allows
respect to the face of slide member 118. Thus, the angu
the web 24 to move upwardly and into the cutter itself.
lar position of the upper blade assembly about the pivot
An L-shaped support bracket 46 is bolted to the trans
axis formed by bolts 98 and 100 is determined by the
angular position of the cam 128. When viewing the cutter
rectangular ‘bracket or plate 46 acts to support a feed 10 as in FIGURE 5, the inclination of the upper blade 96
roller motor 30 through the use of motor bracket mem
may be increased by loosening cam member 128 and ro
ber 52 and a number of mounting bolts 54. On the right
tating it counterclockwise and subsequently tightening
verse wall 44 at base 48 by a number of bolts 50. The
hand side of the machine (FIGURE 1), a U-shaped
the same. The cam member, therefore, acts as a stop
bracket 70 on the vertical side wall 58 acts in conjunc
tion with bracket 46 to support a transversely extending
member in conjunction with reciprocating slide 118 to
positively driven feed roller 28, the feed roller being
mechanically coupled to the output shaft (not shown) of
cated by arrow 112 under the weight of the assembly
itself.
The upper blade assembly 82 has the further function
determine the extent of counterclockwise rotation as indi
the drive motor 30. The web 24 moving upwardly over
lies the horizontal feed roller 28 with the feed roller
of supporting the idler roller supporting assembly, indi
motor 30 determining the length of web 24 which is fed 20 cated generally at 131. An elongated rod 38 extends
at any time to the paper cutter 18. An idler roller 32 is
transversely of the opposed side walls 88 and 90 of the
biased into contact with web 24 and sandwiches the web
upper blade assembly passing through aligned apertures.
between the idler roller and the positively driven feed
The rod 38 carries a pair of spaced idler roller support
roller 28. The web is caught in the nip area between the
arms 34 which depend downwardly from and carry at
rollers with the direction of web movement changing
their bottom ends the idler roller 32. The roller 32 is
from vertical to horizontal as it moves rearwardly into
freely revolvable about the roller axis on the spaced sup
the shearing area of the paper cutter.
'
Referring to FIGURE 3, the left-hand side of the
cutter and vertical side wall 58 extend forwardly of the
machine at right angles to the transverse vertical support
port arms 34. Gravity ensures a light biasing pressure on
the idler roller which acts to sandwich the web 24 be
tween the idler roller and the positively driven feed
roller 28.
wall 44.
Referring next to FIGURE 2, the lower blade assem
A U-shaped bracket member 70 having a base portion
bly 130 includes an elongated blade support member 129
'72 and inner and outer side walls 74 and 76, respec
and the lower blade 133 which is coupled to the upper
tively, is securely a?ixed to the inner surface of vertical
end of the blade support member 129 and generally in
support wall 44 by spaced rivets 80. The support bracket 35 line therewith. While the upper blade assembly 82 is
70 opens up toward the front of the machine. As may
positioned with the cutting edge 96 of the blade extend
be seen, the paper drive roller 28 is journaled in the
ing nearly horizontally, the cutting edge 136 of the lower
lower part of wall 74 of the bracket 70. An upper blade
blade assembly in its initial position is slightly inclined
assembly 82 is pivotably coupled to the left-hand bracket
upwardly from right to left when viewed in FIGURES
46 and the U-shaped support bracket 70 positioned with 40 2 and 4. The lower blade assembly is supported in this
in transverse wall cut-out 45. The upper blade assembly
manner by spaced, pivotable support arms 138 and 140,
comprises a generally ‘U-shaped blade support member
respectively. The right-hand support arm 140 is pivotably
84 which includes a longitudinally extending, generally
coupled to vertical support member 44 by means of bolt
vertical blade support section 86 and a pair of forwardly
member 134 while the lower end of the lower blade sup
directed side walls 88 and 90, respectively. The upper
port arm 140 is pivotably coupled to the blade support
blade 92 is a?ixed to the blade support section 86 by
member 132 by a second bolt member 148. Thus, the
means of spaced bolts 94 (FIGURE 2), thereby provid
blade support arm 140 is free to pivot about the axis
ing a relatively ?xed horizontally oriented, longitudinally
formed by bolt 134 and the lower blade assembly 130
extending cutting edge 96 for the upper blade element.
may freely pivot on the same support arm about the axis
The upper blade assembly 82 is pivotably supported on
of bolt 148. The left-hand lower blade support arm 138
vertical support bracket 46 and bracket side wall 74 by
is of somewhat the same con?guration and is pivotably
a pair of axially aligned bolts 98 and 100. Aligned open
coupled at its lower end to a stationary vertical support
ings (not shown) are provided in side wall 46 near the
member or bracket 152 by bolt 150. The U-shaped
upper edge thereof and side wall 88 of the upper ‘blade
bracket 152 has its base section coupled to the cutter
assembly 82 while axially aligned openings (not shown)
base plate 22. The left-hand support arm is pivotably
are provided in wall 90 of the blade assembly 82 and
coupled to the blade support member 132 at its upper
side wall 74 of the U-shaped bracket 70. Coil spring 104
end by bolt 162. Unlike the right hand pivotable support
is concentrically positioned about bolt 100 and has one
arm 130, the left hand pivotable support arm 138 is
end 106 securely ?xed to the head end of the bolt, while
oriented, prior to the initiation of the cutting stroke, at
the other end of the coil spring extends at right angles 60 a slight inclined but generally horizontal position, where
to the axis of the spring and bolt and is securely posi
as the right-hand support arm 140, when the cutter is
tioned in a hole formed within end plate 90. Spring 104,
idle, is oriented in a generally vertical position. The pivot
therefore, tends to bias the upper cutter assembly 82 to
able bolt connection 162 also serves a second function
the left (FIGURE 1).
of supporting the left-hand end 164 of crank member
The U-shaped bracket member 70 is provided with a
166. The right-hand end of crank member 166 is pivot
pair of aligned, rectangular slots 114 and 116 which re
ably coupled to drive motor arms 174 ‘by a suitable pin
ceive slide member 118. A coil spring 120 is rigidly cou
connection 172. The rotatable arm is driven in a clock~
pled to wall 74 at one end while the other end 124 is
wise direction, as indicated by arrow 176, about its axis
coupled to a right angle pin member 126 carried by the
178 with a pivot 172 following the circular path de
slide. Thus, coil spring 120 tends to bias the slide 118 70 scribed by dotted circle 175. The arm 174 is driven by
against the outer surface of the blade side wall 90.
electrical motor means 170 which has its drive shaft 177
As best seen in FIGURES 3 and 5, the right angle side
secured to the arm 174, thus de?ning the axis 178.
wall member 90 of the blade assembly has coupled to its
With the arm member 174 rotating in a clockwise
outer surface, an eccentric or cam member 128, the cam
direction (FIGURE 4) and the pin connection 172 mov
member being eccentrically mounted by means of screw
ing smoothly from the initial position shown to a posi
3,465,632
6
cutting edge 136 contacts the outer face of the disc-like
tion indicated by circle 172’, the left-hand end of the
blade assembly 130 will initially move, essentially verti
adjustment plate 186.
cally, as the left-hand support arm 138 pivots about the
axis formed by bolt 150 in an arcuate path identi?ed by
arrow 182. Simultaneously, the right-hand end of blade
Adjustment is made when the cutter is idle. When the
lower blade assembly is at rest position (FIGURE 4)
prior to initiation of a cutting cycle, the left-hand tip 196
assembly 130 will be initially moving in primarily a
of the upper blade of the cutting edge 136 contacts the
horizontal direction as its support arm 140 and hence
adjustment plate 186. Subsequently, during the cutting
pivot 148 move in an arcuate manner to the position
cycle, the upper tip edge of the cutting blade will slide
on the adjustment plate to the left and upwardly until
indicated by circle 148’. Thus, the initial action of the
blade is essentially a vertical cutting motion of the left 10 the left-hand side of the lower blade 133 slightly over
laps the upper blade 92. After overlap is achieved be
end of the blade with essentially no scissors action in
tween the left-hand sections of the blades, and as the nip
view of the horizontal motion of the right end. As the
area or point of contact between cutting edges moves
rotation of the arm 174 continues toward position 172",
from left to right (FIGURE 4), any tendency for the
the left-hand edge of the blade assembly tends to have
its motion changed from primarily a vertical direction 15 lower blade assembly to bind on the upper blade assem
bly will be overcome by a clockwise rotation of the upper
to primarily a horizontal direction, with the pivot moving
blade assembly about mounting bolts 98-100 against the
from position 162' to position 162". Likewise, during the
bias of coil spring 104, thus ensuring power blade con
later stages of the cutting stroke, the right-hand side of
tact as the line of cut moves transversely of the web.
the blade assembly 130 has its motion changing from
As mentioned previously, the cyclic operation of the
primarily a horizontal direction from right to left to pri 20
marily a vertical direction upwardly toward the sta—
tionary blade assembly 82 as the pivot 148 moves to
cutter is achieved by means of electric motor 170 which
position 148". This is especially important where the cut
rotates the arm member 174. A typical operation of the
paper or other web feed and the cyclic operation of the
ter is being used to transversely sever a web, such as
cutter may be seen by reference to FIGURE 6 which
25 shows schematically the electrical circuit as utilized in
moist facsimile recording paper.
conjunction with the facsimile machine. An alternating
The tendency, therefore, is rather than the web mov
current electrical supply is delivered to terminals 200
and 202. For instance, terminal 200 may be connected
to the hot line of a single phase alternating current source
be moving in a direction toward the nip area as shown
by arrow 180. The paper moves into or toward the cut 30 with terminal 202 acting as the return side of the system.
ing away from the nip area at blade overlap between the
relatively moving blades, the moist facsimile paper will
Current will, therefore, pass from terminal 200 through
ting point proceeds from left to right as the inclined
line 204 and line 205 to relay-operated switch 218. The
lower blade assembly moves into overlapping relationship
relay-operated switch 218 includes upper and lower sta
with the upper blade assembly. The dotted line 286
tionary contacts 220 and 222 and a movable contact 224.
(FIGURE 4) indicates the high point of the lower blade
assembly and shows its inclined, overlapping position 35 A set of normally open, single pole, single throw relay
contacts 206 act in conjunction with lines 204, 207 and
with respect to the upper blade assembly 82. This move
ment of the lower blade with respect to the upper ?xed
blade is in sharp contrast to the normal scissors action
212 to energize the cutter motor 170. The relay contacts
are closed responsive to a pulse signal which indicates
employed in most conventional cutters in which pivoting
the paper is to be cut in a well known manner not form
to move away from the nip area between the two blades
as cutting proceeds from one side to the other.
motor 30. A common return line 228 connects the feed
motor 30 to the return terminal 202. Line 204 acts addi
Referring to FIGURE 5, it is noted that the inclined
cutting edge 136 of the lower blade assembly 130 must
pass over the relatively stationary, horizontally posi
tioned, cutting edge 96 of upper ‘blade assembly 82. As
set forth previously, the angular position of the upper
tionally to complete a circuit including normally open,
single pole, single throw contacts 206 to the holding
relay coil 214 by means of line 216 and the return to
of adjustable cam member 128. After setting the position
stationary contact 220 and movable contact 224 and
closing the circuit between this contact 224 and stationary
contact 222. Current then passes through line 205,
the left-hand ends of both ‘blades causes the point of 40 ing a part of this invention. The movable contact 224 is
normally in the up position, closing on contact 220 and
overlap to move from left to right in the same manner
completing a circuit through a line 226 to the paper feed
but the web or other material being cut has a tendency
terminal 202. Upon energization of the relay coil 214,
the normally up movable contact 224 moves down,
blade assembly 82 is controlled by the angular position 50 opening the circuit to the paper feed motor bet-ween
of the upper 'blade assembly, it may be necessary to en
sure proper movement of the lower blade assembly past
the upper blade assembly to achieve overlap of the cut
contacts 222 and 224 of relay 218 and line 230 to a
ting blades during the cutting cycle. In order to prevent 55 limit switch 210. Limit switch 210 is a normally closed
switch including a stationary contact 232 and a mov
the lower blade from impinging on the upper blade, plate
able contact 238 which is held open by cam 234 when
186 is adjustably positioned on vertical support plate 44.
the cutter is in an at rest position. Since the motor which
drives cam 234 was directly energized by the closure of
and is ?xed to a threaded screw member 188. The verti
cal support plate 44 includes a threaded aperture 190 60 relay contact 206, the cam 234 causes the closure of
contacts 232, 238 immediately. With the contacts 232
which receives the threaded screw 188 and a nut 192 is
238 closed and contacts 222~224 closed, current passes
carried on the screw for locking the screw in position
through line 208 and line 212 to the cutter motor 170
The adjustment plate 186 is in the form of a thin disc
with the plate 186 spaced horizontally from support plate
to maintain it energized. Simultaneously, a iby-pass circuit
44 at a desired distance. Adjustment is achieved by plac
65 is closed by contacts 222—224 through line 207 to maintain
ing a screwdriver or the like (not shown) in slot 194,
energization of the holding relay coil 214 regardless of
and, while holding the nut 192 with a wrench or like
the position of switch 206.
implement (not shown), rotating the threaded screw 188
In operation, the facsimile feeds the paper to the cutter
to move the disc-like abutment plate toward or away
and controls the operation of the cutter. The strip must
from the ?xed vertical support member 44.
70 be stationary during cutting. Initially, current is passing
from the terminal 200 through lines 204 and 205 to
The lower blade assembly consisting of blade support
the movable contact 224 of relay switch 218 to the feed
member 128 and the blade 133 is inclined upwardly and
motor which remains energized since contacts 220 and
tilted toward the oncoming paper web with cutting edge
224 are closed, the current passing through the feed
136 leaning toward the wall surface of the vertical sup
port member 44. The extreme left-hand tip 196 of the 75 motor 30 and returning by means of common return line
7
3,465,632
228 to terminal 202. If the facsimile receiver now calls
for a severance of the web along a particular line, the
normally open relay contacts 206 momentarily close
allowing current to pass from terminal 200 through lines
204 and 216 to the relay coil 214 and back to the re
turn terminal 202. The coil saturates and the movable,
normally up contact 224 of relay switch 218 moves away
from stationary contact 220 and closes on stationary
contact 222. This opens line 226 to the paper feed motor
and de-energizes the same. Even though limit switch
contacts 232-238 are initially open, upon closure of
8
severing of the web. Again, while the cutter assembly
is shown as being employed in conjunction with a wet
process facsimile machine, it is fully intended that the
cutting apparatus may be used independently of a
facsimile
machine and in face, has broad application to
Ul
transverse web severance of paper or other web stock.
While the invention has been particularly shown and
described with reference to a preferred embodiment, it
will be understood by those skilled in the art that the
10 foregoing and other changes in form and detail may be
made therein without departing from the spirit and scope
normally open switch 206, current will pass directly to
the cutter motor 170 through lines 204, 207 and 212 and
from motor 170 through line 228 to return terminal 202.
of the invention.
Momentary energization of the cutter motor through
axis comprising: ?rst and second blades including longi
tudinally extending blade cutting edges, means for sup
porting said blades for movement of said blade edges into
intersecting and engaging relationship with respect to each
other, means for positioning web stock between said
this circuit will rotate the cam means 234 and close the
switch contacts 232 and 238. Current now passes by
means of stationary contact 222 and line 230 to the limit
switch contacts 232 and 238 and lines 208 and 212 to'
What is claimed is:
1. Apparatus for cutting a web transversely of a web
the cutter motor 170, returning through common lines 20 blades and means for initially moving one end of said
second blade predominantly transversely toward said ?rst
228 to the return terminal 202 continuing the energization
blade and said other end of said second blade predomi
of the cutter motor. Simultaneously, current passes by
nantly longitudinally relative to said ?rst blade to achieve
means of lines 208, 207 and 216 to the relay coil 214
blade edge overlap and for thereafter moving said one
maintaining movable contact 224 and stationary con
tacts 222 closed, these elements performing a holding 25 end predominantly longitudinally and said other end pre
dominantly transversely to effect transverse cutting of said
function for the relay operated switch 218. With the
interposed web.
cutter motor operating, the lower cutter blade will move
2. The cutter as claimed in claim 1 wherein said ?rst
upward and to the left in the manner described previously
blade is ?xedly positioned with the blade edge parallel
to effect the cutting action in which the web being cut
has a tendency to move into the nip between the closing 30 to the plane of the web being cut and said apparatus
futher includes means ‘for pivotably mounting opposed
cutting blades to ensure proper transverse cutting of
ends of said second blade with the edge of said second
the web 24. In driving the lower cutter blade by means
of arm 174, the cutter motor also rotates cam 234
such that the projection 236 will move a full 360° to
blade being inclined to said plane de?ned by the edge of
said ?rst blade, prior to initiation of the cutting stroke.
complete a single cycle of cutting operations prior to 35 3. Apparatus for cutting a Web transversely of a web
axis comprising: ?rst and second blades having longitu
the projection 236 impinging upon the movable blade
dinally extending blade edges, means for supporting said
238 and opening the normally closed contacts 232-238
blades in separate planes for movement of said blade
of the cam operated switch 210. Opening of these con
edges into intersecting and engaging relationship with re
tacts de-energizes the cutter motor 170 and the holding
circuit allowing the normally up movable contact 234 40 spect to each other, and means for positioning web stock
between said blades, said supporting means including
to move away from stationary contact 222 and contact
means for initially moving one end of said second blade
the upper stationary contact 220. Contacts 224 and 220
predominantly transversely towards said ?rst blade and
in closing re-energize the feed motor allowing the feed
said other end of said second blade longitudinally rela
motor to move the paper web in a direction indicated
by arrow 240 (FIGURE 5) until the facsimile receiver o tive to said ?rst blade to cause said edges to intersect and
for thereafter moving said other end predominantly trans
initiates another cyclic operation of the cutter.
versely and said one end predominantly longitudinally to
The electrical circuit of FIGURE 6 shows the cam
ward said point of intercept whereby said web tends to
member 234 as a circular disc having a cam projection
move into the point of intersect between said blade edges
236. In actuality, by reference to FIGURE 4, the left
of said blades as said point of blade edge overlap trans
hand pivoted blade support arm 138 performs the cam
verses the web during the cutting stroke.
ming function with respect to ?xed cam-operated switch
210. Spring arm 240 acts as a cam follower with tip
end 242 in contact with the oscillating arm 138. Mo
mentary energization of the drive motor which causes
rotation of driving arm 174 will result in arm 138 moving
sufficiently away from follower 242 such that the micro
switch portion of cam-operated switch 210 (not shown)
will close switch contacts 232—238 to ensure continued
energization of the cutter motor. The arm 138 oscillates
4. The cutter as claimed in claim 3 wherein said sup
porting means includes means for pivotably mounting
said second blade comprising ?rst and second arms, means
for pivotably coupling one end of said ?rst arm to said
stationary support means and the other end to said sec~
0nd blade with the center line between the pivot points
being generally in line with the edge of said second blade
and means for pivotably coupling respective ends of said
to the extreme vertical position identi?ed by pivot point 60 second arm to stationary support means and said second
162" and then returns to the position shown in FIGURE
blade ‘with the center line between pivot points being
4 opening cam-operated switch contacts 232—238 and
generally at right angles to the edge of said second blade
de-energizing both the cutter motor and the holding
when said blades are fully open.
relay coil 214.
5. The apparatus as claimed in claim 4 wherein said
means for moving said second blade comprises eccentric
It is noted that the operation of the cutter has been
drive means coupled to said blade to cause said support
described in conjunction with a fully automatic machine
arms to oscillate, whereby said ?rst support arm moves
employing electronic signals for terminating the feed of
from its initial in-line position to a position generally at
the web and the achievement of a full cycle of cutter
right angles to the blade cutting edge and said second
movement with automatic re-initiation of the web feed.
Obviously, the cutter operation may be completely 70 arm moves from a position generally at right angles to
said second blade edge to a position nearly in line there
mechanical and manually induced either in conjunction
with or entirely independent of the web feed. The only
with,
requirements are the cessation of web feed and the sub
sequent movement of the lower cutter blade assembly to
6. The cutter as claimed in claim 3 wherein said means
for supporting said second blade with respect to said
its lower-most, inclined position after the transverse 75 ?rst blade includes means for initially inclining said sec
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0nd blade edge With respect to said ?rst blade edge to
ensure that the second blade moves in a direction op
posite to the direction of movement of blade overlap as
it transverses the web being cut.
7. In a cutting apparatus for transverse cutting of a
10
allel with the cutting edge of said second blade and at
right angles to the web path, means tending to twist said
?rst blade about said axis and adjustable stop means for
determining the angular position of said ?rst blade cut
ting edge with respect to said web and said second blade.
Web of inde?nite length, a pair of transversely extending
cutter blades positioned on opposite sides of said web,
References Cited
means for pivotably supporting one of said blades for
UNITED STATES PATENTS
rotation about an axis parallel with the cutting edge of
said one blade and at right angles to the web path, means
tending to twist said one blade about said axis, wall 10
11,381
11/1893
Saltzkorn et a1. ____ 83—664 X
1,565,654
12/1925
Laukhulf ________ __ 83-644 X
means carried by said one blade at right angles to the
1,609,365
12/1926
Knott _____________ _._ 83—564
plane of said transversely extending blade, an adjustment
2,843,203
7/1958
Young ____________ __ 83——554
3,316,791
5/1967 Greis et al _______ __
disc, means for eccentrically mounting said disc on said
blade wall, and a relatively ?xed abutment slide posi 15
FOREIGN PATENTS
tioned in the path of said adjustable eccentric, whereby
213,557
12/1956
Australia.
the angular ‘adjustment of the position of said eccentric
1,008,241 10/ 1965 Great Britain.
on said wall determines the angular position of said
blade assembly with respect to said 'Web and the other
WILLIAM S. LAWSON, Primary Examiner
of said pair of blades.
20
8. The apparatus as claimed in claim 3 wherein said
US. Cl. X.R.
blade supporting means comprises means for pivotably
83—556,
564,
644,
646
supporting said ?rst blade for rotation about an axis par
83—644 X