IMPROVEMENTS IN MACHINES FOR THE MANU- FACTURE OF PAPER BAGS
Year: 1884

page_text: I, WILLIAM ROBERT LAKE, of the firm of Haseltine, Lake & Co, Patent Agents,
Southampton Buildings, London, in the County of Middlesex, do hereby declare
the nature of said invention for "IMPROVEMENTS IN MACHINES FOR THE MANU-
FACTURE OF PAPER BAGS," and in what manner the same is to be performed, to
be particularly described and ascertained in and by the following statement:-
This invention relates to machines for making paper bags and comprises suitable
devices for creating air-currents combined with mechanism for guiding and folding
the paper tube, partly in conjunction with, and partly without, the aid of the said
air-currents. It further comprises a feed by which the bags are fed to the machine,
which feed works through the agency of the air-currents to separate the tubes and
deliver them in rapid succession to the machine proper; and various details of
construction as hereinafter set forth.
The object of the said invention is to feed the tubes for bags automatically to the
bottom forming machine, which forms a satchel bottom on the said tubes, the feed
and satchel bottom-forming mechanism employing air-currents to the end that the
machine shall be continuous in its action and the production of bags of this kind
greatly increased, and their cost reduced.
In the accompanying drawings:-
Figure 1 is a side elevation of a machine for making paper bags constructed
according to this invention.
Figure 2, is a plan view of same.
Figure 3 is a transverse section of the drying rolls on the line y, y, Figure 1.
Figure 4 is a diagram showing how the said drying rolls are rotated.
Figure 5. is a transverse section on the line x, x, Figure 1.
Figure 6 is a sectional view of the pasting wheel and vat.
•
Figure 7 is a perspective view of the formers by which the satchel bottom is
formed on the tube.
Figure 8 is a perspective view of one of the formers for bending down the pasted
ends of the diamond fold.
Finues 0 shame in elevation and section the tension rolls for the feeding bands.

page_text: end opened.
Figure 11 shows several views of the tube, during the formation of the satchel
bottom.
Figure 12 shows a modified form of the final fold for packing.
Figure 13 is a sectional elevation on the line of the belts showing the feed.
Figure 14 is a sectional plan view of the same on the line 8, 8, Figure 13.
Figure 15 is a transverse section on the line tt Figure 14 of the current
interrupter for the feed, and
Figure 16 is a plan view of the top feed finger.
AA indicate the two end frames carrying the belt pulleys B over which the
feed belts or bands C travel, the said end frames are connected by frames A¹. The
bands C may be tightened by adjustable pulleys D pivotted to swinging arms D'
adapted to be secured in various positions by a bolt and slot d. The tube 1, after
passing between the belts C, and having one end extending out of the same, is
carried between the formers E having curved faces e through which are small
apertures e¹. Air is being constantly drawn into the said formers through the
holes, and conveyed by the pipes e and the air trunk F to an exhaust blower F¹.
As the tubes are carried between these formers E, the sides are drawn apart and
kept against the faces e until the said tubes assume the form shown at 2
(Figure 11).
.
To ensure the tube folding properly, a concave part E' is given to the outer
edges of the former, whose final faces assume a vertical position as at E. To
ensure the rear edge folding down first, a bood G is placed over the rear end of the
said formers so that all the air currents are drawn from the forward end and
travel in the same direction as the bag but more quickly.
After being folded as shown at 2 the tube passes over the plate E³, curved at E*
to receive the pasting rollor I (see Figure 6), and as it passes between the said
pasting roller and plate the diamond folds are pressed against the said roll and
receive paste as shown at 3. The paste is fed to the roller I from a cylindrical
vat H clamped in supports h, and the paste flow is regulated by a slide H¹ and
screw H². The paste roller is rotated at the proper speed by the mitre gear
wheels I, I, the wheel I³, the belt I' and the band wheel 15 on the shaft of the
belt wheels B After being pasted, the diamond fold passes under the plates J',
made adjustable by slotted arms ¹, and over the former plates J which are curved
and made adjustable by slotted lugs j. In passing through this former, the pasted
ends or points are bent over the plates J' by the curved former-plates J, and upon
emerging from the same the bottom is pasted as shown at 4. It then passes
under the drying rollers K made hollow and heated by gas jets k. These rollers
are made adjustable to vary their pressure, by screws L, and are rotated by mitre
gearing L which is driven by the shaft L¹, the pinion L³, and the large bevel
wheel L on the upper shaft of the belt wheels B. After the bottom is partly
dried the tube is passed along, and the lower flap is turned up by a guide M and
then the upper flap is turned down by a guide M¹, the bag is received by the
drying rollers N N' which completely dry it, and when discharged it is, as shown
at 5, ready to be packed. If desired the upper flap may be turned back as shown
in Figure 12.
The bands C, C are pressed together to clamp the tube in the following manner.
The lower band runs upon rollers Cheld upon spindles C secured to a bar Cª
bolted to the frame A', and kept in place by a bar C which is held by two or
more nuts. The upper rollers C and their supports are identical with those just
described, but the holes are very large so as to allow the said rollers to con-
stantly rest upon the upper belt and press it down (by their own weight) upon the
lower belt, as shown in Figure 9.
The drying rollers N N¹, one or both of which may be hollow, are provided
with gas jets n by which they are heated, and the upper rolls N are geared with
the rollers N¹ by spur gear wheels N, and may be driven by a band N³ passing

page_text: over a wheel N on the lower shaft of the band wheels B, and the wheels n¹ on
the rollers N¹. Gearing may be used in place of the band N³, if desired.
The air-feed is constructed as follows, that is to say:-The lower band C passes
over a wheel B, at the forward and lower end of the machine, which has flanges B¹
upon either side. The said flanges are provided with a number of apertures b, and
run over flanged heads B³ which close the ends of the said wheel B and upon
which it runs. The heads B are stationary and secured to a hollow shaft B³
provided with apertures 61 opening into the interior of the said wheel B and
heads B'. These heads B' are also slotted at 6' for a quarter of their circumference,
to allow. of the air being sucked through the apertures b, and by which the whole
suction effect is concentrated upon one portion of the circumference of the wheel B.
The hollow shaft or tube B supports an interrupter Q, which consists of a case Q¹
through which air is sucked by a pipe F to the exhaust blower F¹, and which
suction is interrupted or made intermittent by a rotating disc Q having slots or
apertures Q. This disc is rotated by a spindle Q and a band wheel q, which
latter is rotated by a band g', wheels g³ q³, a band q¹, and a wheel q.
By changing the speed of the disc the suction can be interrupted quickly or
alowly to suit tubes of various widths. The tubes are laid in a box P which is
somewhat inclined, to cause them to press against the plate P' and flanges B¹ of the
wheel B, the fingers P2 and P3 preventing more than one at a time passing out of
the box. As the wheel B rotates the upper part of the tube is sucked against the
flanges B¹ and carried up between the belts. The air is then cut off, and after the
tube is clear of the next, the suction is again put on, and the next tube is drawn
up, and so on.
If desired the flanged heads B2 might be rotated or oscillated with the same
effect as using the interrupter Q, or the wheel B might have been made hollow and
have the holes b made in sections, and the suction could then be made continuous,
but this would not allow of ready adjustment for wide and narrow tubes.
The shape of the formers may be changed or modified without departing from
the nature of this invention, as the main feature of the same lies in the use of air
in feeding tubes of paper bag machinery, and in forming the bottom ready for
pasting when acting upon the moving paper tube previously flattened
set forth.
as
While this machine is especially adapted to make satchel-bottom bags, yet the
same principle may be used in making ordinary flat bottomed bags, and if desired
any of the tube machines now in use may be connected to the bottom-forming
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:-
First. In a machine for making paper bags, a former provided with means for
creating suction, and a longitudinal aperture through which the tubes are fed in
close succe-sion side by side, for the purpose of forming the bottom of the bag,
substantially as specified.
Second. In a machine for making paper bags a stationary former made hollow
and having its operating surfaces provided with a number of small apertures, in
combination with an exhaust blower, and pipes connecting the said blower with
the interior of the former, substantially as, and for the purpose specified.
Third. In a machine for making paper bags, a former having two suction faces
curved in opposite directions and arranged to allow the tube sections to pass
between the said faces and side by side as described, and adapted to suck and draw
the sides of the said tube apart to form the bottom of the bag, substantially as
specified.
Fourth. In a machine for making paper bags a former provided with means for
creating a suction, and a longitudinal aperture through the said former through
which aperture the tubes are fed in close succession for the purpose of forming the
bottoms of the bags, in combination with two endless bands having their line of

page_text: contact in line with the aperture in the former, and means for pressing the
said bands together to feed the tubes through the said former, substantially as
Bet forth.
Fifth. In a machine for making paper bags, the combination of the feeding
bands C, the suction former E, the pasting roller I, the folding former J, and the
drying rolls K, substantially as, and for the purpose, specified.
Sixth. A feeding device for sheets or pieces of paper or similar material, consisting
of suction devices for separating the sheets one at a time and feeding them to the
machine, in combination with means for creating suction, and means for controlling
the pulsations of the said suction, substantially as and for the purpose specified.
Seventh. A feeding device for sheets or pieces of paper or similar material,
consisting of suction devices for separating the sheets one at a time and feeding
them to the machine, in combination with means for creating an interrupted
suction, and mechanism for guiding the said sheets to the said suction devices,
substantially as, and for the purpose, specified.
Eighth. The combination of cylinders B, B having apertures b, means for
creating suction through the said apertures from the outside to the inside, the
bands C, C, and a feed box to allow the sheets to feed down flat against the said
cylinders, substantially as, and for the purpose, specified.
Ninth. The combination of the cylinder B having apertures 6 the stationary
heads B B having apertures 6 6, the hollow axles B having apertures 61, the
case Q', disc Q having slots or apertures Qs, the pipe F, the suction fan F¹ and
*means for guiding the sheets against the said cylinder B, substantially as, and for
the purpose, specified.
་
Tenth. The combination of the suction cylinder B, with the inclined box P
having the plate P', sub-tantially as, and for the purpose specified.
Eleventh. The combination of the suction cylinder B, with the inclined box P
having the plate P¹, and 'the finger P³, substantially as, and for the purpose,
specified.
Twelfth. In a feeding device for feeding sheets of paper or similar material, the
combination of mechanism, substantially as described, for creating air currents and
devices as set forth for controlling the said air currents and causing them to act
upon the sheets in succession to separate them one from another, for the purpose
specified.
Thirteenth. The combination of the belts or bands C with the rollers C₁ C, the
latter of which has a large axle hole, the spindles C, and the bars C and C³,
substantially as, and for the purpose, specified.
"
Fourteenth. The combination of the plate E having the curved part E, with the
pasting wheel I and the removable tubular paste vat H having devices to regulate
the flow of the paste substantially as shown and described.
Fifteenth. The formera E having depressions E¹ for the purpose set forth.
100€