An Improved Paper Cut-off Attachment for Box Covering Machines.
Year: 1898

page_text: Date of Application, 22nd Dec., 1898-Accepted, 7th Oct.,
1899
COMPLETE SPECIFICATION.
An Improved Paper Cut-off Attachment for Box Covering Machines.
I, ISIDOR DREYFUSS, of 99, Mott Street, New York City (Borough of Man-
hattan), in the County and State of New York, United States of America, Paper
Box Manufacturer, do hereby declare the nature of this invention and in what
manner the same is to be performed to be particularly described and ascertained
in and by the following statement:-
The object of my invention is to provide an improved cut off attachment for
paper box covering machines, which will be automatic in its action and yet
capable of operation by hand. A further object of the invention is to provide a
means whereby the attachment may be adjusted to boxes of different sizes and
whereby such adjustment may be made by any person of ordinary intelligence
and in an expeditious and convenient manner. It is a further object of the
invention to provide a means whereby there will be the least possible friction
in the operation of the knives, and to so construct the knife-operating mechanism
that the knives will act with a shear cut, one of the knives having a rocking
movement and the other a reciprocating movement, the knife having a rocking
movement being capable of operation to meet the cutting edge of the reciprocat-
ing knife as the latter descends, and leaving the reciprocating knife just prior
to its ascent, so that on the ascent of the reciprocating knife the lower knife will
offer no resistance.
The invention consists in the novel construction and combination of the
several parts, as will be hereinafter fully set forth and pointed out in the claims.
Reference is to be had to the accompanying drawings forming a part of this
specification, in which similar characters of reference indicate corresponding
parts in all the figures.
Figure 1 is a side elevation of the upper right-hand portion of the machine,
showing the application of the attachment thereto;
Figure 2 is a plan view of that portion of the attachment and that portion of
the machine shown in Figure 1;
Figure 3 is a vertical section taken substantially on the line 3-3 of Figure 2,
near the left-hand end of the attachment, illustrating the knives in their normal
position;
Figure 4 is a view similar to Figure 3, the knives being shown as just having
made a cut;
Figure 5 is a detail view of a portion of the stick or rod that operates the
knives, and a detail sectional view of a dog that is employed in connection with
the said stick or rod:
Figure 6 is a vertical section taken through the mechanism at the right-hand
end of the knife shaft, the said section being taken practically on the line 6-6
of Figure 2:1
Figure 7 is a detail outside view of the upper portion of the left-hand end of
the attachment;
Figure 8 is a section taken at the same end of the machine, substantially on
the line 8-8 of Figure 7;

page_text: Figure 9 is a front elevation of the knives and their supports, the knives being
in their normal position;
Figure 10 is a section taken substantially on the line 10-10 of Figure 9,
the knives being in the position shown in Figure 9;
Figure II is a section similar to that shown in Figure 10, the knives being
shown in engagement, and
Figure 12 is a vertical section taken practically on the line 12-12 of
Figures 1 and 2;
Figure 13 is a front elevation of knives mounted in a different manner to
those shown in Figure 9;
Figure 14 is a horizontal section on the line 14-14 of Figure 13; and
Figure 15 is a transverse section on the line 15-15 of Figure 13.
A, represents a portion of the bed of a paper box covering machine, and B
the drive shaft that is journalled in suitable bearings in said bed, the bearings of
the drive shaft which are designated as 11, being provided with a hood 10 about
centrally between their ends, as illustrated in Figures 1 and 12. The shaft B
may be driven in any suitable or approved manner. One manner of driving the
said shaft is that illustrated in Figure 12, in which a worm wheel 13 is secured
on the shaft B beneath the housing 10, engaged by a worm 14 driven by any
suitable power. The drive shaft B is made to carry a form C, upon which the
box C to be covered is supported, but this form constitutes no portion of the
present invention, and the paper is fed from any suitable source of supply
between knives to be hereinafter described, and to the surface of the box C
that is to be covered.
A rib 15 is formed on the bed A of the machine, and a foot piece for a
standard 17 is mounted to slide on the said rib, so that the standard, which is
the prime support for the attachment, may be carried to or from the form for the
box to be covered. The standard 17 supports a frame D, which consists of a
right-hand upright side 19, to which preferably a sleeve 18 is secured, and is
fitted to slide upon the standard 17, being held in adjusted position by a set
screw 18 or its equivalent. The frame D is thus given vertical movement on
the standard and lateral movement through the adjustment of the standard.
In addition to the right-hand side piece 19 the frame D consists of a left-
hand and correspondingly shaped side piece 20: Each of these side pieces is
provided with a vertical slot 21 near its forward edge, and each frame D is
provided near the top with a rearwardly projecting arm 22, as is best shown in
Figures 1 and 2. The side pieces of the frame are connected near their bottom
at the rear of the slots 21 through the medium of a bar 23. This bar is pre-
ferably L-shaped in cross section, and near its left-hand end is provided with
an opening 24, and just above this opening an adjusting screw 25 is located in
the upper surface of the bar for a purpose to be hereinafter mentioned, and at
each end of the connecting bar an offset or a lug 23, shown best in Figure 9,
is usually formed.
A knife supporting bar 26 is located above the connecting bar 23. This knife-
supporting bar 26 is provided at each end with a lug 27, and the lugs 27 of the
knife-supporting bar are generally made to engage with the inner faces of the
lugs 23 of the connecting bar 23, as shown also in Figure 9, the lugs on the
knife-supporting bar being pivoted to the lugs on the connecting bar by means of
pivot pins or spindles 28. A knife blade, which is the lower knife blade of the
attachment, is secured in any suitable or approved manner upon the upper surface
of the supporting bar 26. The cutting edge of the knife 29 extends forwardly
beyond its supporting bar 26, as shown in Figures 3 and 4, and is given an
upward bevel. The cutting edge of the knife 29 at its right-hand end is longi-
tudinally inclined or cut away, as is shown particularly in Figures 10 and 11.
A shaft 31 is journalled in the rearwardly extending arms 22 of the side pieces
of the frame D, the shaft being carried beyond the sides of the frame to a
greater extend at the right-hand than at the left-hand side. One outer end of
.

page_text: the shaft 31 is loosely passed through a long sleeve 22" which is bolted or other-
wise secured upon the adjacent rearwardly projecting arm 22 of the frame as
shown in Figure 6. Two arms 32 are secured to the shaft 31 within the frame D
near its sides. A longitudinal slot 33 is made in the forward end of each of the
said arms 32, as shown best in Figures 3 and 4, and these arms are adapted to
carry the supporting bar 34 for the upper knife 34". The supporting bar 34
is preferably L-shaped in cross section, and the upper knife 34" is secured to
its under face, the knife blade being given a downward and rearward inclination,
and its rear longitudinal edge is the cutting edge. The said cutting edge is
beveled downwardly or in a reverse direction to the cutting edge of the lower
knife 29.
A hanger 35 is attached to or made integral with the upper edge of the sup-
porting bar of the upper knife at each of its ends. Each of these hangers is
provided with two members, especially at the top; but the hanger at the left-
hand end of the upper knife is shorter than the hanger at the right-hand end
of the same knife, so that the upper cutting blade is longitudinally inclined,
being in its normal position nearer the right-hand end of the lower blade or
knife than the left-hand end. Each hanger receives between its members the
slotted end of one of the said arms 32 attached to the shaft 31, and the pivot
pin 36 is passed through the top of each hanger and through the slot in the arm
pertaining to the hanger; and preferably at each end of the upper knife-support-
ing bar and at the outer face of each hanger, lugs 37 are formed, which enter and
are adapted to slide in the slots 21 made in the sides of the frame D.
In order that friction shall be reduced to a minimum, where the arms 32
connect with the upper knife-supporting bar, a friction roller 38 is preferably
placed upon each pivot pin 36, the friction rollers being held to travel in the
slots 33 of the said arms 32, as shown in Figures 3 and 4.
A plunger head 40 is located at the outer face of the left-hand side bar of the
frame D, the plunger head being provided with a longitudinal or vertical slot 41
through which the shaft 31 is loosely passed. The plunger head 40 is provided
with a rearwardly extending block 39, in which block a latch 42 is held to slide
parallel with the shaft 31, the head of the latch, which is beveled, extending out
beyond the outer side face of the block, as shown in Figures 7 and 8, the latch
being attached to a spring arm 43, which is secured to the inner side face of the
said block 39, as is most clearly shown in Figure 8. This spring serves to
normally hold the head of the latch beyond the outer side face of the block.
A rod 44 is secured to the lower face of the plunger head 40, and this rod is
made to pass freely through an arm 45 (Figure 9) located at the rear of the left-
hand side of the frame D, which arm 45 at its inner end is attached to an arm 46,
which is carried through the opening 24 in the connecting bar 23 of the frame,
as shown in Figures 3 and 4, to a connection with the supporting bar of the lower
knife, the arm 46 being likewise passed immediately below the adjusting
screw 25, which limits the upward movement of the arm 46 and the forward rock-
ing movement of the lower knife 29, since when the connected arms 45 and 46
are elevated the lower knife is rocked forward, and as the said arms are depressed
the lower knife will be carried rearwardly. A nut 47 is secured on the plunger
rod 44 just above the arm 45, through which the rod passes, and in the normal
position of the plunger rod and its guide arm the nut 47, which may be a collar,
will be in engagement with the said guide arm. The spring 49 is coiled around
that portion of the plunger rod 44 which is below the guide arm 45, the spring
having bearing at its upper end against a head 48 formed at the lower end of said
plunger rod.
The plunger head and its rod are raised through the medium of a collar 50,
which is secured upon the left-hand end of the shaft 31 through the medium of a
set screw 51 or its equivalent; and the collar 50 is provided with a rearwardly
projecting lug 52, which as the shaft revolves will be in the path of the pro-
jecting end of the rod 42 carried by the plunger head.

page_text: A spring 53 is coiled around the shaft 31 near its right-hand end, and the said
spring is a torsion spring, being contracted when the shaft is turned in one
direction, and serving to return the shaft to its normal position when the latch
is disconnected from the projection of the collar 50. This spring 53 has one.
of its ends attached to a collar 54, which is fast on the sleeve 22" through. which
the shaft 31 extends as shown in Figure 6, the other end of the spring being..
secured to the rear extension 55 from one of the right-hand supporting arms_32..
The attachment of the ends of the spring is best shown in Figure 2, where the
ends are designated as a and a¹.
In the operation of the knives, the knives being in their normal position,
shown in Figure 9, the shaft 31 is turned by suitable mechanism in a manner to
place the spring 53 under tension, the arms of the upper knife will be carried
downward, and as the shaft turns to effect this movement of the upper or recipro-
cating knife, the projection 52 on the collar 50 attached to the shaft at its left-
hand end (see Figs. 7 and 8) by engagement with the head of the latch 42, will
carry the plunger head and plunger rod 40 and 44 upward, placing the spring 49
of the plunger under tension and causing the guide arms 45 and 46 for the
plunger rod to be raised, thus rocking the lower knife forward; and at about
the time the cutting edge of the upper knife at the right-hand end reaches the
corresponding end of the cutting surface of the lower knife, the latter will have
been advanced sufficiently to bring its cutting edge in engagement with the
cutting edge of the upper or reciprocating knife; but as the upper knife will
first strike at its lower or right-hand end the beveled surface 30 of the lower
knife, the lower knife will be gradually pushed, rearward against the tension
of the spring 49 and the upper knife will cut the paper with a perfect shear
cut. As soon as the cutting action is effected between the two knives, the pro-
jection on the collar 50 will be free from the latch 42 it having been withdrawn,
and the spring 49 of the plunger rod will then immediately act to rock the
lower knife rearward, so that the upper knife, when it ascends, will not be in
frictional engagement with the lower knife, since a space will intervene the two
knives, as shown in Figure 10. The upper knife will ascend as soon as the
shaft 31 is relieved from driving action, the upper knife being returned by tho
torsion spring 53 in assuming its normal position.
The upper knife may be operated by hand at any time, if a handle be secured
on the shaft 31 preferably near its centre, since the mechanism employed for
driving the shaft 31, to be hereinafter described, will not act upon the shaft 31
after the cut has been made until it is intended that such mechanism shall be
brought into action, and through the medium of such mechanism the machine is
rendered automatic in action.
The driving mechanism for the knife above referred to, is shown best in
Figures 1, 2, 3, 5 and 9, and is as follows:-
-
At the right-hand end of the shaft 31 a sleeve 56 is securely fastened by means
of a set screw, or otherwise, and the said sleeve is provided with a projection 56ª,
as shown in Figure 9, which extends downward, and with a horizontal arm 57
from the said projection, which is carried beneath the shaft, parallel therewith.
A second sleeve 58 is loosely mounted on the shaft 31, and this second sleeve 58
is provided with a forked spur 59, which straddles the forward surface of the
arm 57 of the fixed sleeve 56, and a rear projection 60 (Figure 2) from the loose
sleeve 58 is made to slide in a slot 61 produced in a bar 62 (Figure 9) the said
bar being vertically adjusted on the loose sleeve 58 by means of a set screw 63
(Figure 2) or the equivalent thereof. The lower end of the bar 62 is bifurcated
and provided with eyes 64 (Figure 9) in which eyes a cylindrical block 65 is
mounted to turn; and at one end of this cylindrical block a set screw 66 is
located, which extends through into a slot made in the central portion of the
cylindrical block, through which slot the upper end of a stick or bar 67 is passed,
the stick or bar being adapted to actuate the shaft 31. The throw of the shaft 31
is regulated by the adjustment of the stick or actuating bar 67 in the cylindrical
block 65, which is accomplished by the manipulation of the set screw 66.

page_text: The actuating stick or bar 67 is provided near its lower end with a notch 68
(Figure 1) in its lower face. The hub 70 of a support 71 is mounted to turn
upon the sleeve projection 12 of the bearing 11 for the main shaft B, as shown
in Figure 12. This support 71 is in the nature of a plate or a casting, and as
shown is oblong and provided at its top near its rear end with an upright 72
(Figure 1) provided with a bearing 73 and at its forward end with an upright 74,
having a bearing 75 formed thereon; and the forward and lower end of the
actuating stick or bar 67, is mounted to slide loosely in the said bearings 73
and 75. An adjusting screw 76 is located in the forward upright 74 of the
supporting plate 71, the working end of the said set screw extending to the
rearward, as shown particularly in Figure 1; and at the lower portion of the for-
ward end of the supporting plate 71 an eye 77 is located. The downward and
forward movement of the agitating bar 67 is limited by a pin 78, which when
the stick has been carried as far forward as is needed, engages with the rear
upright 72 of the supporting plate 71.
The supporting plate is provided at its rear end usually with a neck 79, shown
in Figure 2, and from the said neck a guide lug 80 is carried outward. A pro-
pelling device is provided for the actuating stick or rod 67. This propelling
device is preferably in the nature of a plate or a casting, and is held to slide
upon the supporting plate 71 in engagement with the outer face of the said sup-
porting plate, being guided in its movement on said supporting plate to some
extent by the hub 70 (Figure 12) of the supporting plate passing through a
longitudinal opening 82 (Figure 1) in the propelling plate 81, the hub fitting
loosely in said opening. The propelling plate is provided at its forward end
portion with an offset 82, in which offset a friction roller 83 is preferably
journalled, and a guide rod 84 is carried forward from the offset 82ª and through
the eye 77 of the supporting plate 71. When the propelling plate 81 has been
carried as far to the front as is necessary, the offset 82" will engage with the
eye 77, as shown in positive lines in Figure 1, the dotted lines showing the rear-
ward or normal position of the said propelling plate.
The propelling plate 81 is provided with a rearwardly extending neck 85
having an outwardly projecting lug 86, and in this lug one end of a rod 87 is
secured, a washer 88 being placed upon the said rod adjacent to the said lug, as
is also shown in Figure 1. The rod 87 is passed loosely through a projection 80
from the rear portion of the propelling plate. A spring 89 is coiled around the
said rod at its rear end, having bearing against the projection 80 from the sup-
porting plate and against a head 90 formed at the rear end of the rod. When the
propelling plate is carried to its forward position, the spring 89 is placed under
tension.
An upwardly extending standard 91 is formed at the forward upper portion
of the propelling plate, and upon the inner face of this standard, above the upper
edge of the supporting plate 71 a dog 92 is pivoted to the standard 91, as shown
best in Figures 1 and 5. The dog 92 is provided with a head 93 which extends
beyond the plane of its outer face. The said head is pointed and is adapted to
enter the slot 68 in the agitating rod or stick 67. The head 93 of the dog at
its offset portion is provided with two small cavities 94 and 95, into either of
which an end of a spring-controlled latch 96 may enter, the latch being seated
in the standard to which the dog is pivoted. A cam 97 is secured upon the
outer end of the main shaft B, and the said cam is preferably of oblong shape,
and is adapted to turn in direction of the arrow shown in Figure 1.
In the operation of this form of actuating mechanism for the knives, supposing
the propelling plate 81 to be in the dotted position shown in Figure 1, the other
portions of the device being in the position shown in positive lines, with the
exception of the cam. As the cam revolves, the nose of the said cam will engage
with the roller in the offset 82 of the propelling plate, and will gradually force
the propelling plate forward; and when the propelling plate has reached its
forward position, shown in positive lines in Figure 1, the dog will have been

page_text: engaged by the set screw 76 and will have been drawn upward, the latch 96
entering the rearmost cavity 95 in the head of the latch, thus carrying the head
of the latch into the notch or recess 68 in the actuating stick or rod 67. The
spring 89 connected with the propelling plate will now have been placed under
tension, and as soon as the nose of the cam disengages from the roller of the
offset 82ª of the propelling plate, the spring 89 will expand and will quickly
draw the propelling plate rearward, causing the dog 92 to force the rod 67 in
the same direction, as shown in dotted lines in Figure 1, carrying the plate 62
also rearward, and causing the loosely mounted sleeve 58 (Figure 6) to be rocked
rearward; and the said sleeve engaging with the projecting arm 57 of the
sleeve 56 secured to the shaft 31, will turn the said shaft in a direction to place
its spring 53 under tension and carry the reciprocating knife downward, at the
same time operating the lower or rocking knife. The momentum of the stick in
its rearward passage will cause the notch 68 to pass the dog when the propelling
plate becomes stationary, and the said dog will then gravitate downward to the
dotted position shown in Figure 1, and the latch 96 will enter the forward
cavity 94, holding the dog out of the path of the stick, and permitting the
spring 53 on the shaft 31 to return the knives and the stick to their initial or
normal position.
In the construction shown in Figures 13, 14 and 15 the bed A¹ may be made
in any desired manner, and is provided with a rib 100 upon its upper face, re-
ceiving the foot piece 101 of a standard 102. The frame for the knives G and G₁
comprises a right-hand upright 103, a left-hand upright 104 and a bottom con-
sisting of a front bar 105, L-shaped in cross section, and a rear bar 105. The
standard 102 passes through a sleeve 106 formed upon the right-hand upright 103
enabling the frame to be adjusted vertically, and the adjustment of the frame is
controlled by a set screw or the equivalent thereof. Bearings are located at the
rear of the uprights of the frame, in which bearings a tension-controlled shaft 107
is journaled, capable of being driven by hand or otherwise. When the shaft is
driven by hand a forwardly extending handle (not shown) is secured to the
shaft about centrally between its bearings.
A block 109 is located at the right-hand end of the front angled bar 105 of
the frame, being horizontally adjusted through the means of a screw 110. The
lower knife G is pivoted at one end upon the block 109 while the other end of the
knife is secured to a tension-controlled block 111, having horizontal movement
at the opposite end of the front frame bar, as shown in Figures 14 and 15. The
forward edge of the knife is the cutting edge, and said edge is downwardly and
rearwardly beveled.
The knife G occupies a diagonal position above the lower knife, and in the
normal position of the upper knife one end is nearer the lower knife than the
other. The upper knife is rigidly secured to hangers 112 and 113, having guide
lugs arranged to slide in vertical slots 114 made in the uprights 103 and 104;
and the forward or cutting edge of the upper knife is upwardly inclined to a
greater or less extent. Each hanger 112 and 113 is provided with an upper
inwardly extending pin 115, and the pins are made to enter elongated slots 116
in arms 117, forwardly projected from the shaft 107. Under this construction it
will be observed that the lower knife has spring-controlled horizontal movement,
and the upper knife positive vertical movement, and that as the result of these
movements, and the position of the knives relative to each other, a clean sheer
cut is obtained that can be made in any thickness of material that the machine
need carry.
Having thus particularly described and ascertained the nature of my said
invention, and in what manner the same is to be performed, I declare that what
I claim is:.
1. A cut-off attachment for box-covering machines substantially as herein
chat and

page_text: 2. In a cut-off attachment for box-covering machines, à rocking knife, a
reciprocating knife having movement to and from the rocking knife, and means,
substantially as described, for actuating the reciprocating knife and carrying the
rccking knife to and from the reciprocating knife respectively on the down
stroke and the up stroke of said reciprocating knife, substantially as described.
3. In a paper cut-off for box-covering machines, a reciprocating knife, a
rocking knife capable of movement to and from the reciprocating knife, the
reciprocating knife being longitudinally at an angle to the rocking knife, the
rocking knife having its cutting surface longitudinally beveled at the point
where the reciprocating knife most nearly approaches the rocking knife, for the
purpose set forth.
4. In a paper cut-off for box-covering machines, a horizontal tension-controlled
rocking knife, and a longitudinally-inclined reciprocating knife, hangers for the
reciprocating knife capable of movement to and from the rocking knife, a pivotal
support for the said hangers, and an actuating connection between the pivotal
support for the hangers of the reciprocating knife and the tension device for
the rocking knife, as and for the purpose specified.
5. In a paper-cut-off for box-covering machines, a frame, a knife mounted to
rock in the said frame, a reciprocating knife mounted to slide in the said frame
to and from the rocking knife, the reciprocating knife being longitudinally
inclined with relation to the rocking knife, a tension controlled device adapted
to impart rocking movement to the rocking knife, means for suspending the
reciprocating knife, a rotary support for the suspension attachment to the
reciprocating knife, and a connection between the said rotary support for
the reciprocating knife and the tension attachment for the rocking knife, the con-
nection being such that at the downward movement of the reciprocating knife
the rocking knife will approach it and will leave the reciprocating knife prior to
its return movement, as specified.
6. In a paper cut-off for box-covering machines the combination, with a frame,
a knife mounted to rock in the said frame, an arm connected with the rocking
knife, a shaft, means for rotating the said shaft, a plunger carried by the said
shaft and having vertical movement thereon, and a spring connection with the
arm connected with the rocking knife, and a lifting connection between the said
shaft and the said plunger, of arms secured to the said shaft, a knife the support
whereof has vertical movement in the said frame, the said vertically moving
knife being longitudinally at an angle to the rocking knife, and arms connected
with the said shaft and with the support for the reciprocating knife, substantially
as shown and described.
7. In a paper cut-off for box-covering machines, the combination, with a frame,
a knife mounted to rock in the said frame, an arm connected with the rocking
knife, a shaft, means for rotating said shaft, a plunger carried by said shaft and
having vertical movement thereon, and a spring connection with the arm con-
nected with the rocking knife, and a lifting connection between said shaft and
said plunger, of arms secured to the said shaft, a knife the support whereof has
vertical movement in the said frame, the said vertically moving knife being
longitudinally at an angle to the rocking knife, hangers connected with
arms attached to
the support for the reciprocating knife,
the said
shaft, pivoted in the said hangers, the said arms at their pivot point being pro-
vided with longitudinal slots, and friction rollers carried by the pivots of the
arms, the said rollers being held to travel in the slots of the said arms, for the
purpose specified.
8. In a paper cut-off for box-covering machines, the combination, with a frame,
a spring-controlled shaft journaled in the said frame, a knife mounted to rock
in the frame below the shaft, actuating arms for the rocking knife, a plunger
having spring-controlled connection with the said arms, the plunger being held
to slide vertically on the said shaft, the plunger being provided with a spring-
controlled latch, and a projection from the said shaft located in the path of the

page_text: said latch, of an upper knife, longitudinally inclined with respect to the lower or
rocking knife, a support for the upper knife, hangers attached to the said sup-
port, guides from the upper knife support, held to travel in vertical slots in the
said portions of the said frame, and arms connected with the said hangers and
with the said shaft, for the purpose specified.
9. In a paper cut-off for box-covering machines, an inclined reciprocating
knife, a horizontal rocking knife to and from which the reciprocating knife is
adapted to have movement, the rocking knife being provided with a longitudinal
bevel at its cutting edge opposite the lower end of the inclined knife, and means,
substantially as described, for carrying the rocking knife toward the reciprocating
knife on its downward stroke and from the reciprocating knife on its upward
stroke, for the purpose specified.
10. In a paper cut-off for box-covering machines, a rocking and a reciprocating
knife, a shaft controlling the movement of the two knives, a drive shaft, a cam
carried by the drive shaft, a pivoted support, an actuating stick held to slide
in the pivoted support and having an attachment to the actuating shaft of the
knives, a plate guided by the said pivoted support, the said plate being actuated
by the said cam, and dog carried by the cam-actuated plate, which dog is
adapted for engagement with the said actuating stick, for the purpose set forth.
11. In a paper cut-off for box-covering machines, the combination, with a
shaft adapted to operate knives, the said shaft being provided with a torsion
spring, of a drive shaft, a plate pivotally mounted on the said drive shaft an
actuating stick having guided movement in the said pivoted plate, a rocking
attachment between the said stick and the actuating shaft for the knives, a
propelling plate having guided movement upon the pivotal plate and provided
with a dog adapted to enter a recess in the said actuating stick, a shifting device
for the dog carried by the pivotal plate, and a cam carried by the main shaft,
being arranged to actuate the propelling plate, which plate is spring-controlled,
for the purpose specified.
12. In a paper cut-off for box-covering machines, the combination, with the
main frame of the machine, an auxiliary frame vertically and laterally adjustable
upon the main frame, knives carried by the auxiliary frame, and a spring-
controlled shaft having operative connection with the said knives, of a main
shaft, a supporting plate pivoted at the main shaft, an actuating stick having
guided movement in the said pivoted support, the actuating stick being pro-
vided with a recess in one of its edges a plate adjustably attached to the said
stick and means for turning the knife-actuating shaft by the movement of the
said plate connected with the stick, a spring-controlled propelling plate having
guided movement upon the pivoted supporting plate, a dog carried by the pro-
pelling plate, a trip for the said dog carried by the supporting plate, and a cam
carried by the main shaft, and arranged for actuating connection with the
propelling plate, for the purpose set forth.
13. In a paper cut-off for box-covering machines, the combination, with the
main frame of the machine, an auxiliary frame vertically and laterally adjustable
upon the main frame knives carried by the auxiliary frame, and a spring-con-
trolled shaft having operative connection with the said knives, of a main shaft, a
supporting plate pivoted at the main shaft, an actuating stick having guided
movement in the said pivoted support, the actuating stick being provided with
a recess in one of its edges, a plate adjustably attached to the said stick, and
means for turning the knife-actuating shaft by the movement of the said plate
connected with the stick, a spring-controlled propelling plate having guided
movement upon the pivoted supporting plate, a dog. carried by the propelling
plate, a trip for the said dog carried by the supporting plate, a cam carried by
the main shaft and arranged for actuating connection with the propelling plate,
the said dog being provided with an offset head having recesses therein, and a
spring-controlled latch located in the support for the dog and arranged to
enter either of the recesses in the said latch head, for the purpose specified.
3

page_text: 14. In a paper cut-off for box-covering machines, a frame, a tension-controlled
pivoted knife, and a second knife having movement to and from the pivoted
knife, the path of the second knife being at an angle to the pivoted knife, the two
knives being so arranged that the second knife when engaging with the pivoted
knife will produce a sheer cut upon the material introduced between the two
knives, as described.
15. In a paper cut-off for box-covering machines, a frame, a pivoted tension-
controlled knife having its edge beveled downwardly, said pivoted knife being
normally straight, means for adjusting the pivoted end of the said knife, and a
mating knife having guided movement in the frame, being movable to and
from the pivoted knife, the knife movable in the frame being diagonally dis-
posed with reference to the pivoted knife, one end of the knife guided in the
frame being also closer to the pivoted knife than at its opposite end, and means
for vertically reciprocating the knife guided in the frame to and from the pivoted
knife, as described.
Dated this 00nd law of December 1000
A. M. & WM. CLARK,
Chartered Patent Agents, 53, Chancery Lane, London.