Improvements in Paper Bag Machines.
Year: 1898

page_text: Date of Application, 8th Feb., 1898-Accepted, 19th Mar., 1898
Improvements in Paper Bag Machines.
I, AUSTIN BRAINARD, of No. 218, Main Street, in the City of Hartford, County of
Hartford, State of Connecticut, United States of America, Lawyer, 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:
This machine automatically manufactures continuous tucked paper tubing into
square-bottom paper bags.
The mechanisms herein shown and described have the folding-bed or table repre-
sented as a supplemental carrier, which is pivoted to a conveyer and adapted to be
oscillated when the blank is held to that folding-bed and during the period the
conveyer propels the carrier onward. The conveyer may be a continuous rotating
cylinder, or a reciprocating or oscillating carriage, and I have therefore shown
and described this invention in its adaptation to both of those types of machines.
In my present invention a continuous tucked tube is formed on a former, drawn
through a set of drawing rolls and severed into bag blank lengths and delivered into
the bottom-forming mechanisms for forming the characteristic primary transverse
folding line and unfolding the tucks and forming the inside triangular folds, and the
diamond formed blanks thus produced are transferred to mechanisms for pasting,
cross-folding, and closing the flaps to complete the bag.
The bottom-forming mechanisms consist of a vibrating tucker plate provided with
bevel edged side nippers trunnioned in stationary frames and arranged to vibrate
above the tubular blank in such a nanner, that as the bottom-forming end of the
tube passes along beneath the same, the bevel edged side nippers swing into the
tucks of the tube, and clasp and hold them to the tucker plate. Co-acting with
the tucker plate is a supplemental carrier arranged and operating below the tubular
blank, and which is pivoted to the conveyer, (as I have arbitrarily called the same)
which may be a cylinder, or on a rocking carriage as is shown in the drawings. The
supplemental carrier is also provided with a pair of bevel edged side clips and a front
clip, the former adapted to swing into the tucks of the bellows-sided tube and hold
the plies of the lower tucks, and the latter arranged to swing down on the lower ply
of the tube and hold the same to the supplemental carrier. The tube being held by
these instrumentalities, the tucker plate is caused to vibrate on its trunnions,
mounted in the stationary frames, and simultaneously the supplemental carrier is
caused to oscillate, and thus the tube is unfolded, the primary transverse folding line
across the tubular blank is defined, the inside triangular folds formed and the well
known diamond form produced. The machine as herein shown and described in its
preferred construction, employs two supplemental carriers oscillating upon a cylinder,
but it is obvious that one supplemental carrier will answer, or more than two can be
arranged for, depending upon the length and size of the bag to be produced.
Figure 1 represents a right hand side elevation of the machine of preferred
construction, the conveyer being represented as a continuous revolving cylinder.
Figure 2 is a left hand side elevation of that which is represented in
Figure 1

page_text: Figure 3 is a front view of the machine, drawn on an enlarged scale, showing the
tucked paper tube gripped between the drawing rolls and in a position ready for he
bottom-forming mechanisms to operate thereon, and also showing the striker in a
position ready to sever the blank from the continuous tube, also showing a part of
the broken away former.
.
Figure 4 is a side view taken on the broken line 4-4 of Figure 3 in the direction
of the arrows.
Figures 5 to 21 inclusive, show plan and edge views of the blank at different
stages, when the bottom-forming mechanisms are in operation thereon or the flaps
being folded. The views are drawn on an enlarged scale in relation to the previous
views.
Figure 22 and Figure 23 represent a plan and an end view of the bevel edged side
clips as arranged on the supplemental carrier, taken on the broken line 23ª of
Figure 22 in the direction of the arrows, also showing the mode of operation and
detail construction of the rear flap folding mechanisms.
Figures 24, 25 and 26 are a plan, end and a side view of the tucker plate with its
side nippers operating thereon.
Figure 27 and Figure 28 are a side and end view respectively, of a modified form of
the conveyer adapting the supplemental carrier to a rocking or reciprocating carriage,
and showing the blank clasped by the front clip and bevel edged side clips to that
carrier.
Figure 29 and Figure 30 represent the blank in a more advanced stage than that
shown in Figure 27.
In the following specification, similar letters or numerals of reference designate like
or equivalent parts, wherever found throughout the several views and the numeral 20
designates the frame of the machine, to which is attached the former 21 in the well
known manner and which also supports at the lower end in brackets the roll of
paper, 22, from which the paper is drawn and folded into the continuous tucked
tubing from which the bag blanks are severed. At the upper end, the frame carries
on each side the uprights 23 and 24, in which the various shafts and mechanisms are
journalled as hereinafter more fully described.
Motion is communicated to the machine by means of the pulley 25, driven in the
direction of the arrow 26 (see Figure 2), fastened to the shaft 27, which is journalled
in the uprights 23 and 24, and carries on the inner side of the upright 23, a gear 28
and on the outer side of the upright, the gear 29, from which the different
mechanisms are driven.
The gear 28 meshes into the gear 30 which is fastened to the shaft 31, which is
journalled in the uprights 23 and 24 and has fixed upon it the upper rear drawing
roll 32. The gear 30 meshes into the gear 34, which is fastened to the shaft 35
which is journalled in the uprights 23 and 24, and has fastened thereto the upper
front drawing roll 36. The gear 30 also meshes into the intermediate gear 37, which
is rotatably mounted on the stud 38 fastened to the upright 23, and which meshes
into the gear 40, fastened to the shaft 41 which is journalled in the upright 23 and
24 and has fixed upon it the lower rear drawing roll 42. The gear 40 meshes again
into the gear 44 fastened upon the shaft 45 which carries the lower front drawing
roll 46. Fastened to the shaft 45, on the left hand side of the drawing roll 46, is the
miter 47, meshing into the miter 48 on the striker shaft 49, which is journalled in
projecting lugs 24 and 24 of the upright 24 and carries clamped thereto the striker
arm 50, which revolves across the path of the tube, carrying it against the serrated
knife 51 and severing a blank at each rotation. The gears 30, 34, 40 and 44, with
their corresponding rolls 32, 36, 42 and 46, are so geared in relation to the striker
arm 50, that for each revolution of the striker arm a suitable length of tubing
is drawn forward to make the body and the bottom-forming end of the bag blank.
By the means above described, a continuous motion is transferred from the driving
mechanisms to the' drawing rolls, and the tucked paper tube severed into bag blank
lengths and delivered to the bottom-forming mechanisms to perform their respective
functions as will now be explained.

page_text: On the right hand side of the upright 23, and fastened to the shaft 27, 'as previously
stated, is the gear 29 which meshes into the cylinder gear 53 fastened to the shaft 54,
which is journalled in the uprights 23 and 24, and has fastened thereto the mutilated
cylinder or conveyer 55, having the mutilations or sector-like sections 55 and 55',
into which the supplemental carriers are permitted to oscillate, and the tops or
supporting surfaces of the supplemental carriers form the supplement of a mutilation
of the cylinder. The normal position of the supplemental carriers is that position
where the tops or folding surfaces of the carriers form the continuation of the cylinder.
In the drawings, two of these supplemental carriers are shown, indicated by the
numeral 56, pivoted to the cylinder by the shaft 57, the free end of which has
attached thereto the cam arm 58 adapted to engage the stationary cam 59 mounted
on the inwardly projecting hub of the upright 23. 60 is a spring that keeps the cam
arm 58 in engagement with its cam which is of such shape, that as the supplemental
carrier is carried around by the rotation of the cylinder, the carrier is caused to be
oscillated toward the centre of the cylinder and immediately returned to its normal
position as clearly shown in the drawings from Figures 3 to 21 inclusive.
The supplemental carriers are provided with front clips 61 fastened to shafts 62,
their free ends being provided with cam arms 63, engaging the stationary
cam 64 fastened to a projecting hub of the upright 24. The timing of
the cam 64, in relation to the rotation of the cylinder and the severing of the blank
by the rotation of the striker arm, is such, that the front clip 61 is caused to close
against the pressure of the spring 65, as the leading end of the tube advances and
holds the lower ply of the tube thereto as shown in Figures 3 to 21 inclusive, to carry
the same onward and to release the same again, when the diamond form is completed.
The supplemental carriers are also provided with two pairs of bevel edged side clips,
that is, with each front clip is co-acting one pair of oppositely disposed bevel edged
side clips 67, pivotally mounted on shafts 68, in bosses 69 beneath the folding surfaces
of the supplemental carriers. The side clips are held in an open or closed position by
the spring-pressed plungers 70, and operated by the projections 71, as best shown
in Figures 22 and 23. These projections 71 are caused to operate as the cylinder
revolves, by the cam strips 72 and 72ª respectively fastened on the right hand side of
the machine to the stationary cam 59, and
on the left hand side to the
stationary cain 64. The cam 59 which operates the supplemental carrier 56, the
cam 64 which operates the front clips 61 and the cam strips 72 and 72*
which operate the bevel edged side clips as the cylinder revolves, are so shaped in
relation to the rotation of the cylinder, and the advancing bottom-forming end of the
tucked paper tube, that the folding surface of the supplemental carrier is slightly
brought out of its normal position, that is, out of the circular path of the cylinder
(see Figures 4, 5 and 6) to enable the tucks of the tube to distend and open, to allow
the side clips as well as the front clips to enter more readily and hold the lower ply of the
tube, and the lower plies of the tucks to that supplemental carrier, and to carry the
blank onward, while the remainder of the bottom-forming mechanisms that are
mounted above the paper bag blank are in engagement therewith, as will now be fully
explained.
Above the paper bag blank is mounted the tucker plate 75, in trunnions 75ª
and 75b, in the stationary uprights 23 and 24, and capable of being vibrated by means
of the pinion sector 76 rigidly connected to the trunnions 75b and meshing into the
sector 77 pivotally mounted on the stud 78, which is attached to the inner side of
the upright 23. The lower projecting arm of the sector 77 is provided with the
projection 79 engaging a cam groove 80 in the gear 28.
The vibrating tucker plate is provided with two oppositely disposed bevel edged
side nippers 83, pivotally mounted by the pivots 84, in the slides 85 which are
adapted to receive a lateral oscillatory motion by means of the collars 86, the
laterally projecting trunnions of which engage the bifurcated arms 87 pivoted in the
projecting hubs of the uprights 23 and 24 on the studs 88. The lower ends of
the arms 87 are provided with the extensions 89 engaging cam grooves 90 of cams 91.
Springs 92 tend to press the nippers away from the tucker plate and thus open the

page_text: same to the extent permitted by the lugs 83 which come in contact with the
collar 86. The nippers 83 are closed and pressed on the tucker plate by means of
the extension 83b, projecting into the spline 75 of the trunnions and abutting the
end of the spline in the trunnions as at 75d; the inward motion of the arms 87 thus
cause the nippers to close and press on the tucker plate as is clearly illustrated in
Figures 24, 25 and 26. The center line of the trunnions 75 and 75b coincides with
a line that passes through the two intersecting points formed by the edges of the
tube and the forty-five degree edges of the nippers and is not substantially in line
with the defining or folding edge of the tucker plate.
The distance from the center line of the trunnions to the folding edge of the
tucker plate is substantially equal to the depth of the tucks and that folding edge
serves to define the primary transverse folding line across the tubular blank as the
same is propelled onward by the cylinder. The timing of the cam grooves 90, that
operate the side nippers, and the timing of the cam groove 80, in the gear 28, that
vibrates the tucker plate 75 are, in relation to the rotation of the cylinder and the
supplemental carrier carried thereby with its clips, such that, as the bottom-forming
end of the tube enters the folding mechanisms, the tube is gripped by grippers on
the supplemental carrier, and simultaneously the nippers enter the tucks and hold
the upper plies of the tucks to the tucker plate. The supplemental carrier as it is
carried along by the cylinder is then caused to swing away from the tucker plate and
simultaneously the tucker plate is caused to vibrate at the rate of speed of the com-
bined movement of the carrier and the rotation of the cylinder and in this manner,
the tucks of the tube are distended and unfolded into the well known inside
triangular folds, and the tucker plate defines the primary transverse folding line
across the tube, as is clearly shown in the drawings in Figures 5 to 16 inclusive, and
converts the tubular blank of Figures 5 and 6 into the diamond form of Figures 15
and 16.
As the supplemental carrier rocks from its lowest position back to the normal
position, the formation and the flattening of the diamond is aided by rocking against
a stationary folder plate as at 93 (see Figures 14 to 16) held on a rod supported by
the uprights 23 and 24. After the diamond is completed the paste is applied by
sector 95, fastened to shaft 96 carrying connected thereto the gear 97 and meshing
into the cylinder gear 53. The gear 97 also drives the gears 98 and 99 on shafts 100
and 101, which have fastened thereto the paste quadrant 102 and paste roll 103, the
latter turning in the paste box 104.
The gears 97, 98 and 99 are geared, with relation to the cylinder gear 53, in such a
manner, that the face of the sector is presented to the cylinder twice to each revolu-
tion of the cylinder and in this manner the paste is deposited upon each diamond
formed blank as it passes under the paste sector.
The folding of the rear and front flaps is accomplished as follows: The paste
sector 95 has fastened thereto the two creaser blades, 106 and 107, at a distance
apart, measured upon the circumference of the paste sector, equal to twice the depth
of the tucks, which distance corresponds with the distance between the transverse
creaser grooves 108 and 109 in the supplemental carriers. To the supplemental
carriers are pivotally mounted, on studs 111 carried by lugs projecting on each side
thereof, the plicators 110, held in their normally open position, as .shown in
Figure 22 in the dotted line position, by springs 112 against stop pins 113, the outer
ends of the plicators having the projections 110 which, as the carriers are carried
around, come in engagement with stationary cams 114 mounted on hubs, turning
the plicators into the positions of Figure 22 and beyond as shown therein. The
folding ends of the plicators that come in contact with the rear flap are preferably
beveled about forty-five degrees with the tangential line passing through a point in
the circumference of the cylinder where the plicators approach the nearest. The
folder 115, for turning and folding the front flap, is mounted on shaft 116 journalled
in the uprights 23 and 24. On the left hand side the shaft has fastened thereto an
arm 117 to which is connected the connecting rod 118, to the lower end of which is
hinged the cam arm 119 mounted on the stationary stud 120. At the upper end

page_text: the arm 119 is provided with the projection 121 adapted to enter the can groove 122
of the cam 123. The folder bar 124 reaches across from the upright 23 to the
upright 24 and over that folder bar the front flap is folded as shown in Figures 4, 19,
20 and 21, and then the completely folded blank is delivered to bands 125 and 126
passing over delivery rolls 127 and 128.
The timing of the cams 114 that operate the plicators 110, and the timing of the
cam 123, that operates the folder 115, and the timing of the cam 64, that operates
the front clip 61, are such relatively to each other and to the rotation of the
cylinder, that the front clip 61 releases the forward end of the diamond blank, before
the cylinder has revolved far enough to carry that forward end down opposite the
bar 124; and so that the plicators turn the rear end of the diamond
form, over upon the middle of the diamond form, before the cylinder has
revolved far enough to put the groove 109 opposite the bar 124; and
that the folder 115 thereupon engages with the blank along the transverse crease,
opposite the groove 109, and carries that place forward under the bar 124 into the bite
of the rolls 127 and 128, and thus causes the bar 124 to fold the forward end of the
diamond form backward over the middle part of the diamond form, and over the rear
flap, so as to complete the folding of the bag.
So
Figures 27, 28, 29 and 30 represent this machine in the form where the
supplemental carrier is attached to an oscillating conveyer, instead of to a rotating
cylinder.
The connecting rod 131 is worked by a crank (not shown in the drawings) and is
pivoted by a stud 132 to the rocking carriage 133 and that carriage rocks upon the
shaft 134 in the uprights 23 and 24. The operation of the vibratory tucker plate 75,
with its co-acting side nippers is identical with the foregoing description, and
therefore needs no further explanation. The supplemental carrier A, receives an
oscillatory motion by means of the connecting rod A¹, attached to arm A², on
the shaft A3 mounted in the carriage 133, the outer free end having attached the
arm A provided with projection A5 engaging the cam groove Aº.
At the front end of the carriage is pivotally mounted the front clip, B, on the
stud, B¹. The clip is operatively connected to the connecting rod B², which is
attached to the arın B³. The latter is fastened to the shaft B4, the free end of
which has connected thereto the cam arm B5, provided with the extension Bo
engaging the cam groove B7. The bevel edged side clips, C, which are pivoted in
hubs adjacent to and below the folding surface and on oppositely disposed sides of the
These
supplemental carrier, have the extensions C₁ which engage the arms C².
arms are fastened to the shaft B¹ which is operatively connected to the connecting
rod C¹³. The lower end of the rod is pivoted to the arm C, fastened to the
shaft C, on the outside of which is carried the arm C having the extension C7,
which engages the cam groove C³. The cam groove A° that operates the
supplemental carrier A, the cam groove B7 that operates the front clip B, the cam
groove C3 that operates the side clips C, are timed in relation to the oscillation of the
reciprocating carriage 133, so that, when the carriage is in the position nearest to
the drawing rolls, the supplemental carrier is lowered to the extent to safely allow for
the entering of the bottom-forming end of the tucked paper tube between the carrier
and the tucker plate. The front clip B and the side clips C are then caused to close,
the former holding the lower ply of the tube and the latter entering in to and between
the tucks and holding the lower plies of the tucks. Simultaneously the side nippers 83
enter the tucks and hold the upper plies of the upper tucks to the vibrating tucker
plate. The blank being held by the instrumentalities just described the carriage 133
is rocked forward, the supplemental carrier A is caused to be lowered and the tucker
plate caused to be vibrated by its respective cams through the positions as shown in
Figures 29 and 30, thus unfolding the tucks and producing the inside triangular
folds, and defining the primary transverse folding line across the tubular blank, and
converting the tucked paper tube into the well known diamond form, which may
be drawn from the carriage and the end flaps folded by any of the well-known
mechanisms.
then

page_text: The operation of the machine is as follows:
The paper is taken from the roll 22, at the base of the frame, folded around the
former 21 and converted into a continuous tucked paper tube, which is guided into the
bite of the drawing rolls 42 and 46, under the serrated knife 51 and between
the rolls 32 and 36, and as the striker revolves across the path of the tube, it forces
the tube against the serrated edge of the knife 51 and severs the blank therefrom at
each revolution. The drawing rolls are so geared with relation to the revolution
of the striker as to feed through a suitable length for each rotation thereof. The
bottom-forming end of the tube is then guided into the bottom-forming mechanisms,
in such a manner that the same enters between the tucker plate 75, provided with
the bevel edged side nippers 83, and the supplemental carrier 56 which is pivotally
mounted to the cylinder 55, and which is provided with the front clip 61 and the
two oppositely disposed bevel edged side clips 67. The tube, as it arrives at about the
position as shown in Figures 5 and 6, is clasped by the front clip 61, the same being
carried by the cylinder and by virtue of the cam 64; the side clips 67 are then
caused to close by means of the cam 72, thus holding the lower part of the tube to
the supplemental carrier. Simultaneously the side nippers 83 are caused to close
by means of the cam groove 90, and, as the cylinder continues to rotate, the
supplemental carrier is swung away from the tucker plate, and the tucker plate
vibrated at the same time, the folding edge forming the characteristic primary
transverse folding line across the tubular blank, and unfolding and forming the well
known inside triangular folds, passing from the positions as shown in Figures 5 to
16 inclusive and converting the tubular blank into the diamond form. The paste
is then applied thereto from the paste box 104, the roll 103, quadrant 102, and the
paste sector 95 to which are attached the creaser blades 106 and 107 which engage
the transverse creaser grooves 108 and 109 respectively, the creaser blade 107 and
the creaser groove 108, co-operating to make a crease across the diamond blank, and
thereby to somewhat raise the rear end of the diamond, which is immediately backed
up by the plicators 110 carried by the supplemental carrier and engaging the
cam 114, as shown in Figures 17 and 18. The motion of the plicators continues
until the flap is completely turned forward, and meanwhile the front clip 61 has been
opened, the spring of the paper causing the front flap to be thrown over the
flap bar 124 and against the folder blade 115. Each plicator is then returned to its
normal position and the folder blade then caused to move downward at a rate to
remain with its folding edge in the creased line formed by the creaser blade 106
and the groove 108, until the bag is delivered into the bite of the delivery rolls and
carried away by the bands 125 and 126 into a drier to be dried, and afterward bound
and packed for sale and use.
This machine is distinguished from all prior machines for making square-bottom
paper bags, in many respects, one of which consists in the new mode of operation by
which it folds the diamond form of the paper. That new mode of operation includes
carrying both plies of the paper tube, at the primary transverse folding line, which is
defined by the lower edge of the tucker plate, forward under the secondary transverse
folding line, across the upper ply of the paper tube, which is afterwards defined by
the creaser blade 107, and the creaser groove 108; instead of carrying the secondary
transverse folding line backward over the primary transverse folding line. In this
new mode of operation, the carrier oscillates inward from its normal position, while it
is co-operating with the tucker plate to make the primary transverse fold and the
inwardly inclined triangular folds, during the first half of that making, and oscillates
outward to its normal position, while it is thus co-operating, during the last half of
that making; whereas in every prior machine, the folding-bed which most nearly
corresponds with the carrier of this machine, does not thus oscillate, while those folds
are being made, but simply holds the lower ply of the paper tube against all oscilla-
tion, while the lower ply is being turned over backward upon itself. It results from
this new mode of operation, that all the devices, which act upon the paper to make
the primary transverse fold and the inwardly inclined triangular folds, are moving for-
ward while they are making them; whereas in the prior machines, some devices

page_text: which help to make those folds are moving backward at that time.
And this new
result is promotive of speed, and also of some of the other superiorities which
characterize this machine.
Having now 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. The combination of a conveyer, an oscillating carrier having its forward end
pivoted to the conveyer, mechanism to oscillate the carrier upon its pivot, and devices
to co-operate with the carrier during both parts of its oscillation and during its for-
ward movement with the conveyer, to unfold a paper tube and to refold it into a paper
bag blank, substantially as described.
2. The combination of a conveyer, an oscillating carrier pivoted to the conveyer,
mechanism to oscillate the carrier upon its pivot, and a tucker plate vibrating upon
trunnions not substantially on a line with its defining edge, all co-operating during
the forward movement of the conveyer and during both parts of the oscillation of the
carrier and during the vibration of the tucker plate, to unfold a paper tube and to
refold it into a paper bag blank, substantially as described.
3. The combination of a conveyer, an oscillating carrier pivoted to the conveyer,
mechanism to oscillate the carrier upon its pivot, devices to hold the lower ply of a
tucked paper tube upon the face of the carrier, a tucker plate vibrating upon
trunnions not substantially on a line with its defining edge, and devices to hold the
upper ply of a tucked paper tube against the face of the tucker plate, between the
line of its trunnions and the line of its defining edge, all co-operating, during
the forward movement of the conveyer and during both parts of the oscillation of the
carrier and during the forward vibration of the tucker plate, to unfold a tucked paper
tube and to refold it into a paper bag blank having inwardly inclined triangular folds,
substantially as described.
4. The combination of a rotating conveyer, two or more oscillating carriers pivoted
to the conveyer, mechanism to oscillate each carrier upon its pivot, and one set of
mechanism placed and adjusted to co-operate with each of the carriers successively,
during the forward movement of the conveyer and during both parts of the oscilla-
tion of that carrier, to unfold a paper tube and to refold it into a paper bag blank,
substantially as described.
5. The combination of a rotating conveyer, two or more oscillating carriers pivoted
to the conveyer, mechanism to uscillate each carrier upon its pivot, devices to hold
the lower ply of a tucked paper tube upon the face of each carrier, a tucker plate
vibrating upon trunnions not substantially on a line with its defining edge, and
devices to hold the upper ply of a tucker paper tube against the face of the tucker
plate, between the line of its trunnions and the line of its defining edge, all
co-operating, during the forward movement of the conveyer and during both parts of
the oscillation of each carrier and during the forward vibration of the tucker plate, to
unfold a tucked paper tube and to refold it into a paper bag blank having inwardly
inclined triangular folds, substantially as described.
6. In a paper bag machine, the combination of the cylinder provided with a
mutilation, the carrier pivotally mounted on that cylinder and means for imparting
thereto an oscillatory motion by a cam and adapted to swing the same into a mutila-
tion of the cylinder, the folding surface of that carrier forming the continuation of
the folding surface of the cylinder when the carrier is in its normal position, and
devices co-operating with that carrier to effect the unfolding of the tucked paper
tube, substantially as described.
7. In a paper bag machine, the combination of the cylinder provided with a
mutilation, the carrier pivotally mounted on that cylinder and means for imparting
thereto an oscillatory motion by a cam and adapted to swing the same into the
mutilation of the cylinder, the folding surface of that carrier forming the continua-
tion of the folding surface of the cylinder, when the carrier is in its normal position,
and being provided with the front clip and the two oppositely disposed side clips, and

page_text: devices co-operating with the carrier to effect the unfolding of the tucked paper tube,
substantially as described.
8. In a paper bag machine, the combination of a conveyer, an oscillating carrier
pivoted thereto and provided with means to hold the lower part of the tubular blank
thereto, the tucker plate provided with means to hold the upper part of the tubular
blank, the parts combined and operating to distend and unfold the tucked paper tube
while the carrier is oscillated, and operating means to cause the tucker plate to
vibrate and define the primary transverse folding line across the blank, the whole
operating to convert the blank into the diamond form, substantially as described,
while the blank is carried onward by the conveyer.
9. In a paper bag machine, the combination of a conveyer, an oscillating carrier
pivoted thereto, operating means to cause the same to oscillate and means to hold
the lower part of the tubular blank thereto, the tucker plate trunnioned in the
uprights and provided with the side nippers, operating means to cause the tucker
plate to vibrate, and means to close the nippers on the tucker plate, all parts com-
bined and operating to distend and unfold the tucked paper tube and form the inside
triangular folds while the carrier oscillates and the tucker plate defines the primary
transverse folding line across the blank, and operating to convert the blank into the
diamond forin while the blank is carried onward by the conveyer, substantially as
described.
10. In a paper bag machine, the combination of the conveyer, the carrier pivotally
mounted thereon, operating means to cause the same to be oscillated, and the front
clip and the two oppositely disposed side clips arranged to swing down upon the lower
part of the tubular blank and hold the same to the carrier, the tucker plate trunnioned
in the uprights and provided with the side nippers, operating means to vibrate the
tucker plate and operating means to cause the side nippers to swing down onto the
tucker plate and hold the upper part of the tubular blank, all parts combined and
operating to distend and unfold the tubular blank to form the inside triangular folds
while the tucker plate defines the primary transverse folding line across the blank
and operating to convert the tucked paper tube into the diamond form while the
same is carried onward by the conveyer, substantially as described.
11. In a paper bag machine, the combination of the cylinder provided with a
mutilation, the carrier pivotally mounted on the cylinder, means for imparting
thereto an oscillatory motion, and a front clip and the two oppositely disposed side
clips, the tucker plate trunnioned in the uprights and provided with the side nippers,
and operating means to vibrate the tucker plate so that the folding edge travels with
the combined movement of the cylinder and the carrier in order to define the primary
transverse folding line, substantially as described.
12. In a paper bag machine, the combination of the cylinder provided with a
mutilation, the carrier pivotally mounted on the cylinder, means for imparting
thereto an oscillatory motion and a front clip and the two oppositely disposed side
clips arranged to swing down upon the lower part of the tubular blank and hold the
same to the carrier, the tucker plate trunnioned in the uprights 23 and 24 and pro-
vided with the side nippers, and operating means to vibrate the tucker plate so that
the folding edge travels with the combined movement of the rotating cylinder and
the oscillating carrier to define the primary transverse folding line and unfold the
tucked paper tube into the diamond form while the blank is being carried onward,
substantially as described.
13. A folding-bed adapted to support one side of a paper bag blank, a tucker plate
having a folding edge adapted to define the transverse folding line across the blank
on the other side of the blank and provided with trunnions, slides adapted to recipro-
cate on said trunnions, nippers pivotally mounted on the slides, the annular collar
surrounding the slides, and operating means to carry the slides with the nippers
laterally, substantially as described.
14. A carrier provided with means adapted to support and hold one side of a paper
bag blank, a tucker plate having a folding edge adapted to define the transverse fold-
ing line across the blank on the other side thereof and provided with trunnions

page_text: mounted in the uprights of the machine with means to cause the same to be vibrated,
the slides adapted to slide on the trunnion and carrying the nippers pivotally mounted
thereon, the springs 92 for holding the nippers in the normally open position, the
annular collar surrounding the slides and operating means for carrying the slides with
the nippers laterally, substantially as described.
15. A carrier provided with means to support and hold one side of a paper bag
blank, a tucker plate having a folding edge adapted to define a transverse folding
line across the blank on the other side thereof and provided with trunnions mounted
in the uprights of the machine with means to cause the same to be vibrated, the
slides adapted to slide on the trunnions and carrying the nippers pivotally mounted
thereon, with the projection 83b engaging the spline in the trunnions, means to cause
the slides to oscillate, and means to cause the same to close and press on the tucker
plate all combined and operating, substantially as described.
16. A folding-bed adapted to hold one side of a paper bag blank, a tucker plate
having a folding edge adapted to define the transverse folding line across the blank
on the other side thereof, and provided with trunnions mounted in the uprights of
the machine and means to cause the same to vibrate, the slides adapted to slide on
the trunnions and carrying the nippers pivotally mounted thereon and the springs 92
for holding the nippers in the normally open position, projections 83b engaging
splines of the trunnions and causing the same to vibrate with the trunnions and the
tucker plate, substantially as described.
17. A folding-bed adapted to hold one side of a paper bag blank, a tucker plate
adapted to define the primary transverse folding line across the blank on the other
side thereof and provided with trunnions mounted in the uprights of the machine,
the distance from the center line of the trunnions to the folding edge of the tucker
plate being of substantially the depth of the tucks of the tube, operating means to
cause the same to be vibrated, the slides adapted to oscillate upon the trunnions and
vibrate with the same and carrying pivotally mounted, bevel-edged side nippers,
springs 92, to open the nippers when the projection 83b is disengaged from the end
of the spline, all combined and operating, substantially as described.
18. In a paper bag machine, the combination of the conveyer, the carrier pivotally
connected thereto, operating means consisting of a cam to cause the same to be
oscillated, the plicators pivotally mounted on oppositely disposed sides of the carriers
and operating means consisting of a cam to cause the same to sweep over the
traveling folding-bed of the carrier as the same is carried along by the conveyer,
substantially as described.
19. In a paper bag machine, the combination of a cylinder, provided with a
mutilation, the carrier pivotally mounted on the cylinder and means for imparting
thereto an oscillatory motion, the plicators pivotally mounted in oppositely disposed
sides of the carrier, and operating means consisting of a cam to cause the same to
sweep over the surface of the carrier directly back of the creaser blade, substantially
as described.
20. In a paper bag machine, the combination of a cylinder, provided with a
mutilation, the carrier pivotally mounted on the cylinder and means for imparting
thereto an oscillatory motion, the plicators pivotally mounted in oppositely disposed
sides of that carrier, and operating means consisting of a cam to cause the same to
sweep over the surface of the carriers directly back of the creaser blade co-acting with
the transverse creaser groove 109 as the carrier is propelled onward by the cylinder,
substantially as described.