USRE9202E - Paper-bag machine - Google Patents

Description

8 Sheets-Sheet 1. M. E K N I G H T, Assignor, by mesne assignments, to THE EASTERN PAPER-BAG G0.

Paper-Bag-Machine. No. 9,202.

Reissued May 18, I880.

s Sheet s -Sheet a.

M. E. KNIGHT," Assignor, by mesne assignments, to THE EASTERN PAPER-BAG Go.

Paper-Bag Machine.

ued May 18, 1880.

W1 I'f FLE 5 E 5. 4/%W 0222M UNITED STATEs PATENT OFFICE.

MARGARET E. KNIGHT, F. SPRINGFIELD, M ssAonUsETTs, ASSIUGNOR, BY MESNE'ASSIGNMENTS, To THE EASTERN EATER BAG COMPANY, 0E-

HARTFORD, CONNECTICUT.

PAPER-B G MACHINE.

SPECIFIC ATION forming part of Rein-nod Letters Patent No. 9,202, Kay 18,

Original No. 6.842. dated July ll, 1871. Applicatlon for reissue died March 5, 1830.

To all whom it may concern:

Be it known that I. MARGARET E. KNIGHT, formerly of Boston, in the county of Sulfolk and State of Massachusetts, but now of Springfield, in the county of Hampden and State of Massachusetts, have invented a new and Improved Machine for Making Paper Bags; and I hereby declare the following to be a full and correct description of the same, reference being had to the accompanying drawings.

, Figure 1 represents, in side elevation, a paper-bag-making machine containing my improvements; Fig. 2, a plan or top view thereof. Fig. (l-represents, in elevation, the opposite side of the machine; Fig. 4, an end view thereof, taken from the feeding end of the machine; Fig. 5, a view of the bag-delivery end of the machine; Fig. 6, a detail of the tube-severing knife or cutter and its frame; Fig. 7, a detail side view of the finger, showing-it in two of its positions; Fig. 8, a detail of one of the sidefolders and its operating parts; Fig. 9,'a perspective view of the bottom of a bag, such as the machine herein describedwill make from i z 5 a web of paper; and Figs. 10, 11, and 12 show,

respectively, the successive folds made in the tube to form the flat or satchel bottom, viz: the diamondand first and second cross-folds.

Prior to this my invention it hasbeen cus- 0 tomary to automatically form a web of paper into a tube and sever it transversely with one ply longer and so as to lap over and be automatically pasted to the other ply .to'Torm the bag-bottom, and so, also, it was customary to 3 5 hold a paper tube clamped near its end and by hand fold it to form a diamond fold, and then to make cross-folds andcomplete the flat bot- .tom for the bag but, prior to my invention, I am not aware that amachine was ever devised 40 to first fold a web of paper into a tube and then, by the continuous operation of the map chine, so operate upon the leading end of the tube carried automatically-forward as to form the diamond fold, which is the basis of the flat- 5 bottomed bag.

. In this my improved machine a continuous web of paper is folded about a former to make a tube. The tube is fed forward over and beyond the end of the former. Its end is opened mac.

and laid back to form the diamond fold, after which a length of the tube is cut sufficient for a bag, and the diamond-folded end of the piece of tube so cut off is then folded transversely and pasted in the form required to producea satchel-bottom bag.

My invention in satchel-bottom-bag machinery consists, essentially, in a novel device, denominated by me as the finger, the'purpose and aim of which are to enter the open end of or act upon one ply of the paper tube, lay it back upon itself, and form the diamond fold,

which is the foundation fold in the manufacture of a flat or satchel bottom bag.

My invention also consists in the combination. with feeding mechanism to move the tube forward, of a finger to enter the open end of the tube as it is being fed forward, and, by its action within the tube upon one ply thereof,

lay it back in opposition to the direction of movement of the tube by the feeding mechanism, thus forming the-diamond fold.

- My invention also consists in the combination, with the paper-tube-feeding mechanism and the finger to act upon one ply of the paper within its open or leading end, of a transverse blade or folder, one purpose of which is to insure a straight transverse fold in but one ply of the said tube and determine the line or direction of said fold as that ply is turned outward and back by the said finger within the tube during the operation of forming the diamond fold.

My invention also-consists in the combination, with the former about which the web of paper travels, ot' a follower which projects beyond the front end of the former and keeps the two plies of the tube separated, so that the leading end of the tube may be readily entered to permit one ply of it to be raised in the formation of the diamond fold; also, in the combination, with a finger to enter the open end of, and act upon one ply of, a paper tube, and lay it back during the formation of the diamond fold, of a blade and a pair of rolls, theblade being made to descend upon one end of the diamond fold, crease it transversely, and force it'into the bight of the said rolls, which carry the-bag away between them; also, in other features enumerated and claimed at the end ble shape to sustain the operative parts. The

web of paper (of indefinite length) from which the bags are to be made, is drawn from a roll so suspended as to be unwound and supplied to the, machine as fast as required. This web is folded about a former, B, with the lap upon the upper side. The pasting, which makes it a. continuous tube, is effected by suitable devices for that purpose; but such devices being well known are not herein shown.

The larger feed-wheel G on the shaft 1) cooperates with the small roller E, located in arecess in the former B, draws the web of paper from the roll, and, as the latter is made into a tube about the former, feeds the tube forward to the devices which, as the tube is so moved, act to form the diamond fold.

The former, made as an oblong trunk, attached by bracket G to the gallows H, at the rear end of the frame, is grooved to receive the follower I, shown as an oblong metal frame extended at front beyond the former B, and of sufficient thickness at its forward end, 2, to keep separated at its leading end the plies of paper forming the tube, to thereby permit the entrance therein of the finger N, to be hereinafter described. This follower has a projection, a, which is engaged by the arm I) of a rock shaft, 0, supported in bearings d. This rock-shaft is joined by link 0 with the lever L, pivoted at 3, and the lever, acted upon at the proper time by the cam F on the shaft D, moves the follower forward, while the spring M moves it backward to enable the tube to be cut off.

Mounted loosely on the shaft D, and deriv-' ing its motion from gear 16, is the cam 1, suitably shaped to operate the plate-knife folder or blade R. This blade, which extends across the machine above the paper tube, is carried at the end of arms g, jointed to pivoted arms It, connected by a brace, i. The said blade is operated at the proper times by the cam P acting upon the pin j, projecting from the arm It. (See Fig. 2.)

The outer ends of the blade R rest and move in a curved guideway, it, (see Figs. 1 and 3,) which so directs the said blade as to cause'it when operated to move downward and forward and then backward and upward, it, during its forward movement, traveling at substantially the velocity of the tube-feeding mechanism.

As the finger turns one ply of the tube back this blade acts upon the opposite face of the said ply and determines the line of the transverse fold in it and the line of cross-fold at the center of the diamond fold.

Power to drive the machine is applied to the shaft f, provided with a gear, 10, which sets in motion the train of gear 11 12 13 14 and the train 15 16 for operating the different parts. The train 15 16 moves the cam P. The gears 11 12 set in motion the cam-shaft 26.

The shaftf has a cam, I, (see Figs. 3, 5, and 6,) whlch acts upon and depresses the frame m, which carries the tube cutting or severing knife or blade a. The said frame is lifted at the proper time by the spring 0.

The shaft 26 has fixed to it two bevel-gears, 17 18, which engage and drive the bevel-gears 19 20, the studs or journals of which are suitably held in brackets atthe inside of the framing of the machine. These gears 19 20 have pins 21, which enter angular slots 22 in the arms 23, connected with the clamping and folding plates 1 s. 7

Spiral springs 24, connectedwith the arms 23, act to depress the said clamping-plates as the pins 21 travel through the lower half of their movement.

Gear 12 engages and drives the reversinggear 25, fixed on stud 26", which also carries the fixed gear 13, that drives the pinion 14 on the shaft of the lowermost delivering-roller, t,

of the set-of rollers t a 10, all moved by the roller t. Rollers u w are held in their places by spring guards c d.

The cross-folding blade at, to form the second cross-fold in the paper bag on the dotted lines a", Fig. 10, by descending upon and forcing the same between the rollers t w, is attached to the guided rod 27, which is lifted at the proper times by the lever 28, pivoted at 29, the said lever having a link, 30, bent at its lower end under, and so as to be operated by a suitable'cam at the inner face of the gear 31.

Thelink 30, at its lower end, is jointed to the pivoted lever 32, and a spring, 33, below the said lever 32, when the link 30 is released from its operating-cam, acts to lift it and quickly throw down the folding-blade a.

The gear 31 derives its motion from the train of gear 34 35, the latter being fixed at one end of shaft 26.

A pin, 36, at the inner side ofgear 31, strikes and operates in one direction the lever 37 and rock-shaft 38, that actuate the pasting mechanism 39, a spring, 40, operating the pasting mechanism in the reverse direction.

The pasting device works over and is directed in its movement by a suitable guide, 41, and is supplied with paste by a roller, 42, on

an arm, 43, said roller receiving its paste flOlll' a suitable reservoir of paste. (Not shown.)

The arch a has a finger-holder, 44, upon which is pivoted the finger N, provided at its front end, as shown, with the roller 45.

A spring, 46, which bears against a pin, 47, of the finger, tends to keep it in horizontal position, or so as to enter the open end of the paper tube to be folded for a bag, and remain within it and lay back one ply thereof as the latter is moved forward by the feeding mech- This finger is secured to rod 48, havoperated upon to form the diamond fold for the bag bottom, and also while the first crossfold is made, is sustained upon the tube-supporting plate 51.

,The feeding-shaft D, in practice, willbe driven intermittingly by means of intermediate gears from an eccentric at one end of the driven shaft f, so as to have its motion arrested to stop the forward movement of the paper tube just as the clamping plates or folders r s descend upon it, and as the blade n severs it to form a bag-length. The devices for producing this intermitt-ing movement of the feeding devices being common are not herein shown. 1

As the folders are moved back and up from contact with the tube, the diamond fold (see Fig. having been completed, the tube-feeding devices are again permitted to operate.

The follower I starts and moves with the paper tube until it meets the-finger, keepin g the upper and lower plies of the tube separate for the proper entrance into the leading end of the tube of the finger N, preparatory to holding or-pushing back one ply and making the diamond fold, and the finger having entered the tube the follower is drawn back beyond and to the rear of the blade n, so as not to be in the way when the tube is being cut. While the finger enters the leading end of the tube the folder-blade R rests upon one ply of the tube-the upper ply back from its open endand holds down the said ply while the finger acting within the tube turns back, one ply of it across the said blade,- the letterinsuring a straight or right-angledfold of one ply on the line m n. (See Figs. 10 to 12.)

This blade-R, after it is thrown down upon the paper tube in front of the end of the finger, is moved forward at the speed at which the tube isthen being moved or fed forward by the feeding-devices.

Extending, as described, across the upper ply-of the tube, the furthermovement of the machine causes the blade and finger to so change their relative positions, onewith relation to the other, that the said blade passes below the finger, acting against theinnei' face of the upper ply 'of the tube being moved forward, as described, lays back the upper ply, forming the diamond fold, (as inFig. 10,) the finger, as the diamond fold is being completed, passing from the rearmost cornerthereof, after which the further movement of the tube so folded carries it under and beyond the finger. During the time the finger is acting against the inner face of the upper ply, as described,

the under ply at the leading end of the bag must be held down;- This is done in this maleading point q of the diamond fold at that hold the said fold or corner in place.

time being placed between the rolls t u. .The blade R, or first cross-folder, is then drawn partially back, the clampin g plates or folders r 8' time above the clamping-plates, laying the rearmost end of the diamond fold over upon the clam 'iing-plates, forming the first crossfold and the corner 1', (see Fig. 1l,) the finger during this operation being raised, as in dot ted lines, Fig. 7, to..let the fold of paper pass under it, after which the finger is dropped to The blade R and sidefolders are then drawn away, and the first half ofthe bottom of the bag is made. After this 'the paper is permitted to pass between the rollers tu, when the blade at descends and strikes the paper on the line w, folds 'and passes the same between the rollers t 10,-making the second cross-fold, tnrnin g that corner marked a, and completing the other half of the bag-bottom. Justbefore making this last fold the bottom .was pasted by the pasting devices.- The bag-bottom, as well as its entire length, is pressed by its passage between the rollers t w.

I wish to have it understood that, believing myself to be the first to invent adevice to enter and hold or push back'from its inner side a point or portion of one edge or ply of the paper tube in the formation of the diamond fold represented in Fig. 10, which is the basis of the flat-bottomed bag, Ido not confine myself to any particular form, position, or mode of attaching the device so referred to, and which I have designated as a finger, nor do limit myself to making it fixed or movable,'as

have devised'and used it. t

I have made it in various forms, fixed as well as movable, and having a rearward projection like a heel. The finger hereinbefore described I believe to be of the best form; bht other forms witl answer with the necessary modifications of the accompanying mechanism without .altering the principle of operation by which the fold represented in Fig. 10 is made.

The follower extended beyond the end of' the former, and narrower than it, obviates all friction on the interior of the tube.

InFigs. 10to 12, T represents the paper tube, and l. its lapped and pasted edge.

I claim- 1. -In a paper-bag machine, the follower toy keep open the leading end of the tube after passing beyond the former, substantially asdescribed.

2. In an organized paper-bag-making machine the following instrumentalities, viz: the b ade to bear upon one side of the paper tube back of its leading end, and the fingerto act against one ply of the tub and form a diamond fold at the leading end of the tube, for

the purpose setforth.

3. Ina paper-bag machine, the former about which the web of paper is held as a tube, and

finger to act upon and lay back one ply of the leading end of the tube in the formation of the diamond fold, combined with a reciprocating blade to act upon the outer side of that ply of the paper tube which is laid back by the finger, substantially as described.

.4. In a paper-bag-making machine, the following instrumentalities, viz: the blade to bear upon or extend across the tube back of its leading end, the finger to lay back one ply of the tube, and the clamping plates or folders to bear upon and hold the diamond fold central] y, substantially as described.

5. The fingerN, or equivalent device, whether fixed or movable, to operate upon theinner side of the tube and hold or push back a portion of the open end of the tube while the diamond fold is being formed.

6. In a paper-bag machine, the finger to act upon or within a part of the leading end of one ply of the .tube during the formation of the diamond fold, combined with feeding mechanism adapted to feed the tube forward while the diamond fold is being made.

7. In an organized machine for the manufacture of paper bags,'the following instrumentalities, viz: the former about which to form a web of paper into a tube, a finger to operate within the tube at its end to assist in laying one ply of the tube back upon itself, feeding mechanism to move the tube forward during the act of laying the diamond fold,

and the blade to rest upon or extend across the tube, to operate in opposition to the finger,

substantially as described.

8. The pivoted finger to act upon the interior of the paper tube at its end, combined with means, substantially as described, to move the linger in a vertical plane at right angles to the movement of the paper tube along over the former, substantially as described.

9. In an organized machine for the manufacture of paper bags, the following instrumentalities, viz: the former, follower narrower than the former and extended beyond the end of the former, to keep the upper and lower plies of the tube separated, and linger to act upon one ply of thc-t-ube at its leading end and assist in forming the diamond fold therein, substantially as described.

10. The former and finger, combined with the reciprocating follower located within the tube beyond the delivery end of the former, substantially as described.

11. In a paper-bag-making machine, the following instrumentalitics, viz: the finger to hold or lay back one ply of the paper tube at its end, combined with the blade to act upon the outer side of the tube back of its leading end durin g the formation of the diamond fold, and means to reciprocate the said blade to cause the tube to be folded transversely across it to define the usual center fold for the bagbottom, substantially as described.

12. Ihe tube-supporting bed and the movable blade, combined with the clampingplates or side folders. substantially as described.

13. In 'an organized machine for the manufacture of paper bags, the following instrumen'talities, viz: the former about which the tube is held, and finger, blade, and feeding mechanism to form the diamond fold, rollers to act upon the leading end of the diamond fold and deliver the tubular and diamondfolded piece of paper in position to be crossfolded, and blade to make a cross-fold in the diamond fold, substantiz'tlly as described.

14. In a paperbag machine, the combination, with the former about which the tube is 7 diamond fold transversely, substantially as described.

15. In a paper-ljmg-making machine, the following instrnmentalities, viz: the clan'ipingplates rs, and mechanism, substantially as dcscribed, to raise and lower and move the same toward and from the center ofthe tube or bag, and a reciprocating blade to turn one corner of the diamond fold over upon theclampingplates while resting upon the diamond fold, substantially as set forth.

16. In an organized machinecontaining devices to form the diamond fold at the leading end of the tube, the combination, with rollers to engage the leading end of the diamond fold and move the tubular piece of paper forward, of a blade to co-operate with the said rollers and cross-fold the diamond fold as the said tubular piece of paper is being moved continuously 'l'orward'.

amncmnnr n. Kmen'r.

Witnesses HENRY A. UIIAPIN, CHARLES 0. STEARNS.

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