IMPROVEMENTS IN MACHINERY OR APPARATUS FOR MAKING SATCHEL BOTTOM PAPER BAGS
Year: 1881

page_text: LETTERS PATENT to John Henry Johnson, of 47, Lincoln's Inn Fields, in the
County of Middlesex, Gentleman, for an Invention of "IMPROVEMENTS IN
MACHINERY OR APPARATUS FOR MAKING SATCHEL BOTTOM PAPER BAGS."
A communication from abroad by William Clark Cross, of Boston, Massa-
chusetts, United States of America.
PROVISIONAL SPECIFICATION left by the said John Henry Johnson at the
Office of the Commissioners of Patents on the 20th July 1881.
JOHN HENRY JOHNSON, of 47, Lincoln's Inn Fields, in the County of Middlesex,
Gentleman. "IMPROVEMENTS IN MACHINERY OR APPARATUS FOR MAKING SATCHEL
BOTTOM PAPER BAGS." A communication from abroad by William Clark Cross,
of Boston, Massachusetts, United States of America.
This Invention relates to improvements in machinery or apparatus for making
the folds requisite to form satchell bottom paper bags while the bag blank is in
notion, and in such manner as not to interfere with the continuous forward
movement of said blank through the machine.
This result is obtained by the employment of folding cylinders or devices which
rotate continuously in one direction, as will hereinafter be described.
For this purpose a trunk or former is provided, around which paper from the
roll is conducted and folded to form a tube with pasted overlapping edges in the
usual way. These instrumentalities for making and pasting the tube are well
known and in general use in paper bag machines and require no further explanation.
Attached to the front end of the said trunk or former is a metallic guide rod or
bar, consisting of a narrow metallic strip or wire extending between the feed
and the nipper rolls and up to the delivery and feed rolls, which are centrally
grooved for the passage of the guide bar. All of these rolls are driven by suitable
power and revolve at the same peripheral speed. Feed rolls are provided for
driving forward the flattened paper tube formed on the trunk. In advance of the
said feed rolls are another set of rolls, which also act to feed along the paper tube
or blank. The upper one of the pair of rolls carries a jaw or nipper attached to a
077

page_text: rock shaft which is mounted in a recess in said roll, and at one end is provided a
crank arm.
The latter travels over the periphery of a cam fixed to the frame of
the machine, and is held against said cam by a spring. The nipper is held open
by the cam, and when released therefrom is moved in the opposite direction by
the spring. The nipper moves out of its recess and closes down upon the surface
of its roll at a time when it is passing by the guide rod, and to permit this move-
ment the said roll is suitably recessed, which leaves between the guide rod and
the upper ply of the bag blank or tube an opening through which the nipper can
enter the mouth of the blank.
Delivery rolls are also designed to take the blank by the front point of the
partly formed diamond fold, which by its passage between said rolls is pressed and
completed.
Any suitable known instrumentalities for cutting the paper tube into bag
lengths may be employed. The cutter is to be so placed and timed in its move-
ments that the mouth of each blank will come between the rolls just as the nipper
comes around into position to take hold of the upper ply.
The mode of operation of the parts thus far described is as follows:―The rolls
being in rotation the flattened tube or blank is fed forward at the time its mouth
or front end enters between the rolls; the nipper then closes, and in so doing
enters the mouth end of the blank and clamps the nipper ply upon the advanced
rolls. The body of the paper tube still moves forward, held in position by the
guide rod, while the upper ply is carried back and around with the nipper roll
until the front end of the under ply enters between the delivery rolls. The nipper
now releases its hold, and the blank is carried through between the delivery rolls
which press the diamond fold into place The cutter severs at the proper time the
bag length from the tube, and the nipper roll again comes around into position to
take hold of the upper ply of the next succeeding blank. Thus at each revolution
of the nipper roll a blank is severed from the tube and delivered with the diamond
fold formed.
In order to complete the satchel bottom, the end flaps of the diamond fold after
the lines of paste are deposited must be folded over in order to complete the satchel
bottom.
The instrumentalities for making these two folds, which are known as the
second fold and the final fold, will now be described.
In advance of the delivery rolls are another pair of rolls, the upper one of which
has paste ridges or ribs formed on it (supplied. with paste by known means) which
deliver paste upon the diamond fold.
In advance of these rolls are two more pairs of rolls which make the second and
final folds.
The first of these series carries a clamping jaw, and the second roll a blade.
The said jaw is located in a peripheral recess formed in its roll, and like the nipper
herein before described is controlled by a cam fixed to the frame of the machine
which opens it, and a spring which closes it when released from the said cam.
The clamping jaw moves to and from one side of the recess in which it is placed,
and acts to clamp against that face or side of the recess the portion of the diamond
folded blank tucked down into the recess by the blade. This blade is supported
in a radial recess in its roll, and is preferably moveable back and forth therein; it
is pressed outward by a spring, and is retracted against the stress of the spring by
a cam on the frame of the machine. The clamping jaw and blade come together
along the line on the front flap of the diamond fold. The last two rolls are pro-
vided, the one with a spring and cam controlled clamping jaw, and the other with
a tucker blade which are arranged and operate together in the same way as already
described with reference to the first mentioned blades and jaw, to make the fold
on the rear flat, making also in the body of the bag a "blindfold," which can be
readily straightened out afterwards.
The operation of the parts is as follows, it being understood that the rolls are
driven by any convenient power, and revolve at the same peripheral speed:-

page_text: The blank diamond folded and pasted passes point first from one set of rolls to
the others progressively. The blade tucks down into the bite of the open jaw the
front flap and then is lifted by a cam, while simultaneously the jaw is also released
from its can by spring action caused to close upon and clamp the portion of the
flap tucked down by the blade. The front part or point of the flap naturally
stands up a little so as to be above a stationary crossbar or wiper which may be
used to turn back and wipe down the partly folded flap as the blank is fed forward.
The jaw releases its hold in time to allow the blank to pass over the table to the
next pair of rolls, and between these rolls the front flap is pressed down so as to
make the fold. During the passage of the blank between these rolls the blade
tucks the rear flap of the diamond along with the body of the bag blank beneath
that flap down into the bite of the jaw, and the jaw maintains its hold on the
blank until the folded part of the latter has been carried past the wiper or presser
bar which acts to wipe back and down upon the portion of the blank, thus pressing
down the folds and virtually completing the satchell bottom. After the folded
part of the bag passes the last and smaller presser roll the jaw releases its hold,
and the bag drops upon any suitable conveyer which carries it to the usual drier,
where the blind fold formed on the body of the bag is straightened out, and
where the whole bag is dried and also pressed if desired.
In lieu of employing two pairs of rolls to make the second and final folds, three
rolls only may be used.
According to this modification the rolls are suitably driven, and like the rolls
herein before described, are in yielding contact with one another and move at the
same peripheral speed. The first roll carries two spring and cam controlled
clainping jaws, and a cam attached to the frame of the machine opposite one end
of the roll controls the jaw, and another cam is provided on the frame opposite the
other end of the roll to control another similar jaw. The other two rolls carry
each a blade similar in arrangement and operation to the tucker blades already
described, the blade cooperating with the jaw to make the second fold, and the
blade operating with the second jaw to make the final fold. A wiper roll or bar
is provided for pressing down the final fold. The jaw and blade come opposite one
another just as the front flap of the diamond fold has passed the proper distance
between the first and second rolls. The blade tucks this part of the blank along the
proper line of fold down into the bite of the jaw when it is about to clear its cam ;
continued rotary movement of the rolls releases the jaw from control of its cam,
allowing it to close (by spring action) upon the tucked down part of the blank.
The jaw presses and creases the blank along the line of fold, and carries it along
from the first rolls to the third one in advance, and in passing between which the
front flap is wiped back and pressed down, thus completing the second fold. The
jaw after the blank is taken by the last named rolls releases its hold; the bag
between these rolls is acted on by the before mentioned blade and jaw to make the
final fold, the portion of the blank in front of the tucked in portion being wiped
back and down as the blank is drawn along under the wiper and presser roll or
bar, after which the said jaw releases its hold and the bags are discharged from
the rolls, the blind fold formed in the bag body at the time of making the final
fold being readily straightened out afterwards.
It is also feasible to use but two rolls for the purpose of making both second and
final folds. According to this modification clamping jaw roll is provided carrying
two spring-and-cam-controlled jaws, similar in arrangement and operation to those
previously described. In lieu of providing one roll for each tucker blade, as in the
last arrangement just referred to, both blades are mounted in one roll. They are
pressed outwardly by springs, and are retracted by a cam on the machine frame
(as in the other arrangements hereinbefore described) opposite each end of the roll.
During the rotary movement of the rolls the jaw and blade meet at a time when
the blank has entered far enough between the rolls to bring the front flap opposite
them on the proper line of fold, and at this point the front flap is tucked down into
the bite of the jaw and is clamped by the latter.

page_text: The jaw carries the bag around far enough under a wiper bar or roll to cause
the latter to wipe back and down the front flap (thus completing the second fold),
and then releases its hold on the blank in time to allow the latter to rise away
from the periphery of the roll far enough to pass above a second wiper roll or bar.
By this time the rear flap of the diamond has come between the said rotating rolls
and the jaw and blade, which now co-operate to make the final fold in this flap.
The blank continuing in motion and now held by the jaw is carried around that
portion of the blank in front of the point where the jaw has its hold, being deflected
or shunted off away from the roll between the wipers until the jaw travels under
and past the lower wiper bar, which has the effect of folding back and down upon
the body of the bag in rear of the point where it is held by the jaw, that part of
the blank in front of that point in effect doubling the bag upon itself, and making
a "blind fold" in the bag body, but at the same time folding down the final fold
and pressing all the folds. The said jaw retains its hold upon the blank for a
definite period, when it releases the blank which drops upon the upper end of a
carrier, which serves also to straighten out the blind fold in the bag; that fold of
the bag which is doubled back upon the body opens when released, thus catching
over the upper end of the carrier, and the fold, as the bag is carried along, naturally
straightens out. This modification renders it feasible to employ but 3 rolls for the
purpose of making both the diamond fold and the last two folds of the satchel
bottom.
The mechanism adapted to obtain this result is as follows:-
The clamping jaw and blade carrying rolls in so far as concerns the making of
the second and final folds are the same as those described in the last arrangement;
but the lower roll possesses in this case the additional characteristic of being one of
a pair of diamond fold forming rolls. A roll is provided above the first named roll
with a vibratory nipper and the first said roll. In advance of the clamping jaw is
provided a like nipper, the two being controlled by suitable springs and by cams.
The blank passes to these rolls from the former or trunk (described in the first
arrangement) over elastic or spring opening fingers (in lieu of a guide rod or bar),
which open the mouth of the blank enough to permit the nippers to enter therein
and take hold of the plies. The rolls rotate in the direction indicated by the
arrows, and move at the same surface speed. The nippers are shown as about
taking hold of the plies of the blank. Continued rotary movement of the rolls
causes the nippers to close upon these plies, the blank thus held being drawn
along between the rolls, and its mouth end being gradually spread apart by the
two moorng diverging surfaces on which its plies are held. The said cams are so
adjusted that the nipper on the upper roll releases its hold before the nipper on the
lower or middle roll does. The latter carries the point which it holds of the
diamond fold thus partially formed along between the latter roll and a pressure and
paste roll, which presses the diamond fold into shape, and deposits thereon the two
lines of paste as usual. After carrying the blank along still further until the
point of the diamond fold has entered between the middle and lowest, or third, the
nipper releases its hold.
Between the two rolls last mentioned the blank is operated on, and the second
and final folds of the satchel bottom are made in the manner already described with
reference to the previous modification.
In connection with the clamping jaws mentioned in last two arrangements light
spring lifters are provided, which are seated in recesses in the jaw carrying rolls,
being fastened at one end therein, and extending crosswise of the jaws in which
are notches to permit these strips or lifters to be depressed by the tucker blades.
The strips act to throw out from the recesses the tucked in portions of the blank as
soon as the jaws open, and may in some cases be found useful.
The tucker blades should be notched at the point where they come opposite to
the paste lines in order to prevent them from having contact therewith.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed
by the said John Henry Johnson in the Great Seal Patent Office on the
17th January 1882.
"
JOHN HENRY JOHNSON; of 47, Lincoln's Inn Fields, in the County of Middlesex,
Gentleman. IMPROVEMENTS IN MACHINERY OR APPARATUS FOR MAKING SATCHEL
BOTTOM PAPER BAGS." A communication from abroad by William Clark Cross,
of Boston, Massachusetts, United States of America.
The said Invention relates to improvements in machinery or apparatus for
making the folds requisite to form the satchel bottom paper bags while the bag
blank is in motion, and in such manner as not to interfere with the continuous
forward movement of said blank through the machine.
The result is obtained by the employment, substantially in the manner herein-
after described, of folding cylinders or devices which rotate continuously in one
direction, as will hereinafter be described with reference to the accompanying
Drawing.
Figure 1 is a longitudinal vertical central section of so much of a satchel bottom
paper bag making machine as is needed to illustrate the improvements.
Figure 2 is a perspective view of tho nipper cylinder or roller used in making
the first or diamond fold.
Figures 3 and 4 are diagrams representing the diamond fold forming devices in
two of the positions which they assume during the formation of the diamond fold.
Figures 5 and 6 are diagrams representing the devices for making the final folds.
in two of the positions which they occupy in making the said folds.
Figures 7 to 12 are diagrams representing various modifications of the apparatus,
as hereinafter described.
Figures 13 and 14 are views of a satchel bottom bag shewing the direction of
the folds.
A is a trunk or former around which paper from the roll is conducted and
folded to form a tube with pasted over lapping edges in the usual manner. The
devices for making and pasting the tube are well known, and being in general use
in paper bag machines require no further explanation. Attached to the front end
of the former A is a metallic guide rod or bar A', a narrow metallic strip or wire
extending between the feed and the nipper rollers B, C, and up to the delivery
rollers D. The rollers B and C being centrally grooved for the passage of the
guide bar, all of these rollers are driven by suitable power, and revolve at the same
peripheral speed in the direction indicated by the arrows. The rollers B are the
feed rollers proper, and draw forward the flattened paper tube formed on the
trunk A. In advance of the rollers B are the rollers C which also act to feed along
the paper tube or blank. The upper one of the pair of rollers C-carries a jaw or
nipper a attached to a rocking shaft a¹ which is mounted in a recess a² in the said
rollers C, and at one end is provided with a crank arm a³. The latter travels over
the periphery of a cam b fixed to the frame of the machine, and is held against the
said cam by a spring b. The nipper is held open by the cam, and when released
therefrom is moved in the opposite direction by the spring. The nipper moves out
of its recess and closes down upon the surface of its roller C at a time when it is
passing by the guide rod A', and to permit this movement the said rod is recessed,
as shown at c, so as to leave between the guide rod and the upper ply or fold of
the bag blank or tube an opening through which the nipper can enter the mouth
of the blank.
The delivery rollers D are designed to take the blank by the front point of the
partly formed diamond fold, which by its passage between said rollers is pressed
and completed.

page_text: Any suitable known arrangements for cutting the paper tube into bag lengths
may be employed. The cutter in the machine shewn in the Drawing is indicated
at d, being located between the two pairs of rollers B, C. The cutter is to be so
placed and timed in its movements, that the mouth end of each blank will come
between the rollers C just as the nipper a comes around into position to take hold
of the upper ply.
The mode of operation of the parts thus far described is as follows:-The rollers
being caused to rotate, the flattened tube or blank is fed forward, and at the time
its mouth or front end enters between the rollers C the nipper a closes, and in so
doing enters the mouth end of the blank and clamps the upper ply upon the
upper roller C, as indicated in Figure 3. The body of the paper tube still moves
forward, held in position by the guide rod A', while the upper ply x is carried back
and around with the nipper roller, as indicated in Figure 4, until the front end of
the under ply y enters between the delivery rollers D. The nipper now releases its
hold, as shewn in Figure 1, and the blank is carried through between the delivery
rollers which press the diamond fold into place, the blank having the appearance
illustrated in Figure 13, excepting as to the lines of paste 1, 1, which are
subsequently applied to it. The cutter severs at the proper time the bag length
from the tube, and the nipper roller again comes round into position to take hold
of the upper ply of the next succeeding blank. Thus at each revolution of the
nipper roller a blank is severed from the tube, and delivered with the diamond fold
formed.
In order to complete the satchel bottom the end flaps of the diamond fold, after
the lines of paste 1, 1, are deposited, must be folded over on dotted lines 2, 2, and
3, 3, Figure 13, in order to complete the satchel bottom, as indicated at v, w, in
Figure 14.
The arrangements for making these two folds, which are known as the second
fold and the final fold, will now be described.
In advance of the delivery rollers. D are a pair of rollers E; the upper one of
which has paste ridges or ribs formed on it (supplied with paste by known
means) which deliver paste upon the diamond fold along the shaded lines 1, 1,
Figure 13.
In advance of the rollers E are two pairs of rollers F, F, G, G', which make the
second and final folds e, w. The roller F carries a clamping jaw e, and the roller F¹
carries a blade. f. The jaw e is located in a recess formed in the periphery of the
roller F, and like the nipper a, hereinbefore described, is controlled by a cam fixed
to the frame of the machine which opens it and a spring which closes it when
released from the said cam. The cam is indicated by dotted lines at e¹, but the
spring is not shewn in the Drawing. The clamping jaw moves to and from one
side of the recess in which it is placed, and acts to clamp against that face or side
of the recess the portion of the diamond folded blank tucked down into the recess
by the blade f.
This blade is supported in a radial recess in the roller F¹, and is preferably
movable back and forth therein; it is pressed outward by a spring f¹, and is
retracted against the stress of the spring by a cam f2 on the frame of the machine.
The clamping jaw and blade come together along the line 2, 2, on the front flap of
the diamond fold (Figure 13). The rollers G, G', are provided, the one with a
clamping jaw 9 controlled by a cam and spring, and the other with a tucker
blade h, which are arranged and operate together in the manner hereinbefore
described with reference to the blades f and the jaw e to make the fold on the
rear flap along the line 3, 3, (Figure 13), making also in the body of the bag a
"blind fold" which can be readily straightened out afterwards.
The operation of the parts is as follows, it being understood that the rollers are
driven by any convenient power and revolve at the same peripheral speed :-The
blank which is diamond folded and pasted, as shewn in Figure 13, passes point
first from the rollers E to and between the rollers F, F'. The blade then tucks
down into the bite of the open jaw e, the front flap along line 2, 2, and is then

page_text: lifted by the cam, while simultaneously the jaw is also released from its cam and
by the action of a spring is caused to close upon and clamp the portion of the flap
tucked down by the blade, as seen in Figure 1. The front part or point of the
flap naturally stands up a little, as indicated, so as to be above a stationary cross
bar or wiper J, which may be used to turn back and wipe down the partly folded
flap as the blank is fed forward. The jaw relaxes its hold in time to allow the
blank to pass over the table I to the next pair of rollers G, G²; as shown in the
diagram, Figure 6, and between these rollers the front flap is pressed down so as
to make the fold (Figure 14). During the passage of the blank between the
rollers the blade h tucks the rear flap of the diamond on line 3, 3, along with the
body of the bag blank beneath that flap down into the bite of the jaw y, as
indicated in the diagram, Figure 5, and the jaw maintains its hold on the blank
until the folded part of the latter has been carried past the wiper or presser bar H,
which acts to wipe or fold back and down upon the portion of the blank in rear of
line 3, 3, that portion in front of the said line, thus pressing down the folds w, v,
and virtually completing the satchel bottom. After the folded part of the bag
passes the presser roller H, the jaw relaxes its hold and the bag drops upon any
suitable conveyer or carrier which carries it to the usual drying apparatus, where
the blind fold formed on the body of the bag is straightened out, and where the
whole bag is dried and also pressed if desired.
In lieu of employing two pairs of rollers to make the second and final folds v, w,
three rollers only may be used. This modification is represented by diagrams in
Figures 7 and 8. In these Figures the rollers K, L, L', are driven by suitable
power, and, like the rollers herein before described, are in yielding contact with one
another and move at the same peripheral speed. The roller K carries two spring-and-
cam controlled clamping jaws i, i. A cam j attached to the frame of the machine
opposite one end of the roll controls the jaw i, whilst another cam j¹ is provided on
the frame opposite the other end of the roller to control the jaw i; the springs are
not shown. The other two rollers L, L¹, carry each a blade similar in arrangement
and operation to the tucker blades already described, the blade k co-operating with
the jaw i to make the second fold v and the blade k¹ co-operating with jaw ito
make the final fold w; L² is a wiper or pressing roller or bar for pressing down the
final fold.
The jaw i and blade come opposite one another just as the front flap of the
diamond fold has passed the proper distance between rollers K, L.
The blade tucks this part of the blank along the proper line of fold down into
the bite of the jaw, which, as seen in Figure 7, is about to clear its cam. The
continued rotary movement of the rollers releases the jaw from the control of its
cam, allowing it to close (by spring action) upon the tucked down part of the
blank. The jaw presses and creases the blank along the line of fold and carries it
along to the rollers K and L', in passing between which the front flap is wiped or
folded back and pressed down, thus completing the second fold. The jaw i, after
the blank is taken by the rollers K, L', relaxes its hold; the bag between these
rollers is acted on by the blade and jaw i to make the final fold, as indicated in
Figure 8, the portion of the blank in front of the tucked in portion being wiped
or folded back and down as the blank is drawn along under the wiper and presser
roller or bar L, after which the jaw i relaxes its hold and the bag is discharged from
the rollers. The blind fold formed in the bag body at the time of making the final
fold being readily straightened out afterwards.
It is also feasible to use two rollers only for the purpose of making both the
second and the final folds. This modification is illustrated by diagrams in
Figures 9 to 11 inclusive. In these Figures, N is a clamping jaw roller carrying
two jaws i, ¹, controlled by a spring and cam, and similar in arrangement and
operation to those illustrated in Figures 7 and 8. In lieu of providing one roller
for each tucker blade, as in the Figures just referred to, both blades k, kl, are
mounted in one roller O. They are pressed outwardly by springs, and are

page_text: retracted by a cam 2 on the machine frame (as in the other arrangements
herein before described) opposite each end of the roller.
During the rotary movement of the rollers the jaw and blade k meet at a
time when the blank has entered far enough between the rollers to bring the front
flap opposite them on the proper line of fold, and at this point the front flap is
tucked down into the bite of the jaw and is clamped by the latter, as indicated in
Figure 9. The jaw carries the bag around far enough under a wiper bar or roller P
to cause the latter to wipe or fold back and down the front flap (thus completing
the second fold) and then releases its hold on the blank in time to allow the latter
to rise away from the periphery of the roller N far enough to pass above a second
wiper roller or bar P¹, as indicated in Figure 10. By this time the rear flap of the
diamond has come between the rotating rollers N, O, and the jaw and blade ¹
now co-operate, as indicated in Figure 10, to make the final fold in this flap. The
blank continuing in motion, and being now held by the jaw ¹, is carried round
(that portion of the blank in front of the point where the jaw has its hold, being
deflected or shunted off away from the roll N) between the wipers P, P', until the
jaw travels under and past the lower wiper bar P¹, as indicated in Figure 11,
which has the effect of folding back and down upon the body of the bag in rear
of the point where it is held by the jaw, that part of the blank in front of the
said point in effect doubling the bag upon itself and making a "blind fold" in the
bag body, but at the same time folding down the final fold and pressing all the folds.
The jaw retains its hold upon the blank until nearly reaching the position shewn
in Figure 9, at which time it releases the blank, which drops upon the upper end
of a carrier R, which, as shown in Figures 9 and 10, serves also to straighten out
the blind fold in the bag; that fold of the bag which is doubled back upon the
body opens when released, thus catching over the upper end of the carrier, as
shewn in Figure 9, and the fold, as the bag is carried along, naturally straightens
out, as seen in Figure 10. This modification renders its feasible to employ three
rollers only for the purpose of making both the diamond fold and the last two
folds of the satchel bottom.
The mechanism adapted to obtain this result is shewn in Figure 12.
In this Figure the parts corresponding to parts in Figures 9 to 11 are
correspondingly lettered therewith. The clamping jaw and blade carrying
rollers N, O, in so far as concerns the making of the second and final folds, are the
same as those described with reference to Figures 9 to 11, but the lower roller N
possesses in this case the additional characteristic of being one of a pair of diamond
fold forming rollers, the other roller of the pair being shewn at S. The roller S is
provided with a vibratory nipper l', and the roller N in advance of the clamping
jaw is provided with a similar nipper 7, the two being controlled by springs and
by cams m, m'. The blank passes to these rollers from the former A (Figure 1)
over elastic or spring opening fingers (in lieu of a guide rod or bar A¹) which
open the mouth of the blank enough to permit the nippers to enter therein and
take hold of the plies. The rollers rotate in the direction indicated by the arrows
and move at the same surface speed. The nippers are shewn as about taking hold
of the plies of the blank. The continued rotary movement of the rollers causes the
nippers to close upon these plies, the blank thus held being then drawn along
between the rollers, and its mouth end being gradually spread apart or opened by
the two moving diverging surfaces on which its plies are held. The cams m, m³,
are so adjusted that the nipper l' on the roller S relaxes its hold before the nipper
on the roller N. The latter carries the point which it holds of the diamond fold
thus partially formed along between roller N and a pressing and pasting roll T
which presses the diamond fold into shape and deposits thereon the two lines 1, 1,
of paste in the usual manner. After carrying the blank along still further until
the point of the diamond fold has entered between the rollers N and O the
nipper relaxes its hold.
Between the two rollers last named the blank is operated on, and the second and

page_text: final folds of the satchel bottom are made in the manner. already described with
reference to Figures 9 to 11.
In connection with the clamping jaws represented in Figures 9 to 12 are shown
light spring lifters n which are seated in recesses in the rollers carrying the jaws
being fastened at one end therein and extending across the jaws in which are
notches to permit these strips or lifters to be depressed by the tucker blades. The
strips act to throw out from the recesses the tucked in portions of the blank as
soon as the jaws open, and may in some cases be found useful.
The tucker blades should be notched at the point where they come opposite to
the paste lines 1, 1, in order to prevent them from coming in contact therewith.
Having now described and particularly ascertained the nature of the said
Invention, and the manner in which the same is or may be used or carried into
effect, I would observe in conclusion that what I consider to be novel and original,
and therefore claim as the Invention secured to me by the hereinbefore in part
recited Letters Patent is,-
First. The combination of the nipper cylinder, the nipper carried by the same,
and the guide rod or bar, substantially as herein before described and illustrated in
Figures to 4 inclusive of the accompanying Drawings.
Second. The combination of the feed mechanism, the nipper cylinder and its
nipper, the guide rod or bar and the delivery rollers, substantially as hereinbefore
described and illustrated in the Drawings.
Third. The combination of the two pairs of spring-and-cam-controlled clamping
jaws and blade carrying rollers arranged and operating together to make the
second and final folds, substantially as herein before described and illustrated in
Figures 1, 5, and 6 of the Drawings.
Fourth. The combination with the jaw carrying roller provided with two spring-
and-cam-controlled clamping jaws of the two blade carrying rollers arranged and
operating substantially as herein before described and illustrated in Figures 7, 8, of
the Drawings.
Fifth. The jaw carrying roller provided with two spring-and-cam-controlled
clanping jaws in combination with the blade carrying roller provided with two
blades adapted to co-operate, the one with one jaw on the leading flap of the
diamond fold, the other with the other jaw on the rear flap of the diamond fold,
and the two wiper bars P, P', or their equivalent, substantially as herein before
described with reference to the accompanying Drawings.
Sixth. The combination of the rollers N, O, and their adjuncts with the nipper
roller S and pasting and pressing roller T, substantially as hereinbefore described
with reference to the accompanying Drawings.
In witness whereof, I, the said John Henry Johnson, have to this my
Specification set my hand and seal, this Seventeenth day of January, One
thousand eight hundred and eighty two.
J. HENRY JOHNSON. (L.S.)