US1453294A - Paper-bag-bottoming machine - Google Patents

Description

J. W. TAGGART PAPER BAG BOTTOMING MACHINE may 11,1923. 1,45%,Wfi

Filed Nov. 23 1921 2 Sheets-Sheet l y 11, W23. M3794 J. W. TAGGAWT PAPER BAG BOTTOMING MACHINE Filed Nov. 23 1921 2 Sheets-Sheet 2 from the machine.

application tiled vemher at, 192i. aerial tto. fit'tQatil.

To all whom it may concern:

Be it known that ll, Josnrn W. Taceanr,

. a citizen of the United States], residing at Watertown, in the county of efl'erson and 5 State of New York, have invented certain new and useful Tniprovement-s in Paper-Bag bottoming Machines, of which the following is a specification.

This invention relates to a machine for W slitting, pasting and folding the bottom ends of paper bags, and has for its object to provide novel and simple means for carryin out this work.

Tleretofore bottoming machines of the w class were equipped with pasting mecha- 22 upon by the machine-are generally in the form of flat paper tubes and these are usually fed into the machine by an operator with such regularity that'as each tube progresses to a certain point, a rotary or other 25 pad applies the paste to the bottom end fiaps after which the tubes are carried forward to a point where the said fiaps are folded and the finished bagsare discharged As long as the operator maintains a steady and regular feeding" of .the tubes, the automatic pasting and'other parts perform their work perfectly with out soiling or otherwise injuring anyof the tubes and without loss of production of the finished bags. tor misses feeding one or more of the tubes without stopping the machine, thepasting pad operating in synchrony with the drum which carries the tubes, upon arriving at the pasting position daubs the paste upon the exposed face of the drum. lUnlessthis paste is quickly removed from the drum be fore the feeding of the tubes is resumed, a dozen or moreof the suceeding tubes become smeared and fouled by contact with the paste on the dr and are rendered unfit for commercial use. Tn most cases when the tubes are sent through the machine while the drum is fouled with the paste, the tubes adhere to the dr and become torn and eftea the deans at t en ce. t e at it en, however, the opera-- .only results in the destruction of the tubes but also necessitates the shutting down of the machine and the consequent loss of time and production. The object of the present inventionis to obviate the aforesaid troubles and losses and to provide novel,- simple, efi'ective and automatic means for preventing the paste pad from making contact with the drum whenever the regular feeding of the tubes is interrupted. To this end my invention consists of the features and parts shown in the accompanying drawings and set forth and claimed in the aexed specification.

Tn the accompanying. drawings, Figure 1 is a side elevation of a bottoming machine to which my improvement is applied. Figs.

2, 3 and 4t are detailed views of the rocking lever and related parts which control the paste pad. Fig. 5 is a front end elevation of the machine with certain arts omitted. Fig. 6 is a top plan view of the roc'kihg lever and related parts. Fig. 7 is a view of one of the paper tubes after the same has been slitted. And Fig. 8 is a, fragmentary view of the partially folded bottom as it appears just before and immediately after the pasting operation.

Tn the drawings, 2-2 represent the spaced preferably annular frame portions of the machine which are mounted vertically parallel to each other upon legs 2. Each of the sections of the frame are braced by a horizontal girder 2", which supports themain drum 3, the latter being rigid on a shaft 3', whose opposite ends are journalled in hearings 3, which are secured to the girders 2". The drum 3 is employed for carrying the paper bags it (see full and dotted lines in Figs. 1, 2 and 7) through the machine while the bottoms of the bags are "fill being operated upon. 5 represents the o erators table, which is suppod by t e frame sections 2 2. The bags when brought to the machine are in the form of fiat paper tubes 4t having open ends (see Fig.7); These tubes are staclred upon the horizontal top of the table 5, and are fed one at a time in close order into the machine. tween apair of eed rells at, from hich The tubes at are first inserted be-' positioned to time they pass between slitter rolls 7-7, for slitting the bottom ends, as shown at 4 in Fig. 7, for providing the usual foldable end flaps 4 and 4 The roll 7 is provided with its hold upon the flaps until they emerge clear of the said roll and drum, at which point the flap 4 springs away from the spur and gravitates toward the drum. This action is quickly followed by the release of the fiap 4 from the spur. The partial folding of'the bottom end of the tube immediately follows the release of the flaps from the spur -7*. 8 represents a small roller (see Figs. 1 and 5) whose opposite ends are provided with similar projecting annular flanges 8, the said roller being mounted on a shaft 8 which is journalled in the forked end 9 of a rod 9. The opposite end of the rod 9' is rigidly connected to a rock-shaft 9 which may be journalled in the frame sections 22'. The roller 8 performs two functions: the first being to successively engage and press and hold the flaps 4 and 4 against the drum 3, while the opposite lateral bottom end portions of the tubes are being folded diamond-shape, by a pair of conical rollers 10, the latter being mounted on a shaft which is sup-ported by similar brackets 10 carried by the framesections 2-2. In order to carry out this work, the roller 8 is swung outwardly as each tube emerges from the roll 7 from the full line .position to the right-hand dotted position, shown. in Fig. 1. This movement of the roller 8 is accomplished by the rocking of the shaft 9 by means of a lever 9, which is rigid to the said shaft and extends forwardly and downwardly across a constantly driven horizontal shaft 11', upon which is mounted a single-throw cam 9, which lifts the rod 9 and efi'ects the aforesaid out ward movement of the roll 8. The cam 9 is the outward swinging of the roll 8 slightly in advance of the release of the flap Pfrom the spur 7. as described. As the cam 9 moves away from the rod 9", the roller 8 gravitates toward the left and forces the flap 4: against the drum. The shaft 11 carries an arc-shaped paste pad 11', which receives fresh paste from a roller 12 once each revolution, the said roller being supported by a shaft 12, and being rotated in a pan 12 which contains the paste. The pad 11' is mounted on a radial arm 11, which is provided with a relatively broad transverse slot 11", through which the shaft 11 passes. The rotation of the shaft 11 rotates the pad 11 as from the positions shown by full lines to that shown by the dotted lines in Fig. 1, for applying the paste received from the roll 12 to the flaps 4 and 4 of the bag immediately following the partial foldin of the bottom end by the conical rolls 10. 1 ll the rotating parts hereinbefore referred to are driven simultaneously by gears which are connected in a vertical train, indicated by dotted lines at the right in Fig. 5, the said gears being given prime numbers which identify the parts which'they operate. The paste pad 11 is driven by a pair of wedges 13 and 13, which are disposed in the slot 11", at the opposite sides of the shaft 11. The said wedges being connected by pins 13, to one end of a sleeve 14, which is movable lengthwise on the shaft 11, for simultaneously effecting the engagement and disengagement of the said wedges with the opposite ends of the slot 11". The reciprocation of the sleeve 14 and the wedges 1313' correspondingly moves the pad 11 towards and away from the drum 3 and the roll 12, as shown by the full and dotted lines in Figs. 1, 4 and 5. The opposite end of the sleeve 14 is provided with an annular head or flange 14', and the said end is provided with an enlargement which is counter-bored at 14, to receive a spring 14, which normally exerts its tension for holding the sleeve and the wedges-13-13 in the normal operating position shown by the full lines in Figs. 1 and 5 and by the extended dotted lines in Fig. 2, in which position the paste pad 11' is fully extended and alternately receives the paste from the roll 12 and applies the same to the flaps 4 P. 11 represents a collar which is rigid to the shaft 11 and against whose inner end a spring 14" bears. The flange 14 is bored out to receive and is slidable longitudinally upon the collar 11, and the sleeve is driven by the shaft 11 and collar 11 through a key .r, as best seen in Fig. 1. 14 represents a short sleeve which is rigidly mounted on the flange 14. and is provided with an extended cam portion 11, which faces the pad 11. 15 represents a vertically disposed lever, which is pivoted at 15 in a yoke 15, the latter having a reduced threaded nortion 15*, which passes through an upright supporting bracket 15, thence through the horizontal girder 2", and is held in place by nuts 15. The lower end of the lever 15 is normally disposed in the oath of the cam 14, and is rocked on its pivot by the said cam, as shown bythe full and dotted lines in Figs. 3 and 5. when the tubes 4 are being regularly fed into the machine, and while the roller 8 and the paste pad 11' are performing their normal functions. The lower end of the bracket 15 overlaps and guides the lever 15 and the upper end of said bracket engages and guides the upper end of said lever. 16 represents a horizontally disposed latch-bar, which is pivoted at 16 to the top end of a bracket 16, the latter being mounted on the girder 2 parallel to the bracket 15.- The free end of the latch Ttl ' bracket 16*.

raaaaaa depressible, as best shown by the dotted;

lines in Fig. 1, for positioning its free end between the top end of the lever and the adjacent end of the bracket 15?, for preventing the rocking of the lever 15 by the cam 141 as best shown in Fi 4. The lever 16 is depressed by a finger 1?, which is rigid on the top end ofa-rod 17', the latter being supported and guided bya Tug of the The lower end of the rod 17' is pivoted to one end of a horizontal rod 9,

, whose opposite end is rigid to the rock-shaft til 9. By this construction and arrangement the movement of the wheel 8, from the full line to the left-hand dotted line positions (see Fig. 1), throu h the connecting parts 9, 9 9, 17' and 1 depresses the latch 16, as described. Tn order to permit this leftward movement of the roller 8, the drum '3 is provided with parallel circumferential grooves 3* (see Figs. 1 and 5), into which the flanges 8 of the roller 8 drop a sutlicient distance to efl'ect the rocking of shaft 9* and the depression of the latch 16 as described. During the operation of the machine, as long as the tubes or ha i are being fed with the proper regularity, the roller 8 is limited in its movements to the full lineposition shown in Fig. 1. Tu other words, as long as one of the tubes d is passing between the drum andthe roller 8, the said roller travels over the outer face of the tube and cannot enter the grooves 3. en, however, the operator misses feeding one or more of the tubes, the portion of the drum which is rotating past the roller 8 becomes bare, and the roller instantly gravitates toward the left and engages the said grooves. This effects the depression of the latch 16, as described, and prevents the cam 14 from rocking the lever 15 as shown in Fig. at.

The lever 15 being thus held rigid by the latch 16 the next engagement of-the cam 141 with the lower end of said lever edects the leftward movement of the sleeve 14L on the shaft11 and collar 11 against theten-.

sion of the spring 14L". This movement of the sleeve 141 withdraws the wedge 13 from the corresponding portion of the slot 11 in the arm 11" of the paste pad, and at the same time moves the wedge 13' towards the left at the opposite side of the shaft 11,

which action forces the paste pad towards the shaft 11 suficiently to miss contact with the paste roll12. The parts are then held in the last described position while the paste pad is being rotated by the shaft 11 towards and past the pastin position indicated at F in Fig. 1. This s ortening of the stroke of the pad 11" by the wedge 13 is sutficient ing of the bag-tubes is resumed, the tubes passing between the drum 3 and the roller 8 restore the latter to the full line position, shown in Fig. 1. This efl'ects the upward tilting of the latch 16, and again allows the lever 15 to be rocked back and forth idly by the cam 141, as shown by the full and dotted lines in Fi s. 2, 3 and 5. Tn practice the contraction of the pad 11' becomes effective while the pad isapproaching the I roller 12 (see full lines Fig. 1) to receive a fresh supply of aste. Tn Fig. 4t the full line position of t e pad 11 corresponds to the dotted position of the said part in Figs. 1 and 5, and shows that the pad has been rotated one half turn and that the wedges 13 and 13 have exchanged positions. The arrows show the direction of travel of certain of the :parts, and the dotted lines in Fig. 1 show the progress of the paper tubes 4, from the time they pass the pasting position 3, until they leave the drum and pass between feed rolls 18-18, and on to a air of press rolls 19-19", from which the ished bags are discharged. Between the pasting position 3 and the roll 18, the bottoms of the bags are operated upon by the usual creasin and flap-folding mechanisms, the detafied descriptions of which are omitted, because they form no part of the present invention.

Having thus described my invention, what 1 T claim, is-- 1. Tn a paper bag bottoming machine, the combination of the drum having circumferential grooves, and the slitt ng rolls which carry the paper bags to the drum, one of said rolls having a spur which pierces and edects the spreading of the bottom end flaps after the slitting operation, of a rotary paste pad geared toand driven by said drum adapted to apply paste to saidend flaps while the bags are being carried by the drum past a certain point, a roller adapted to engage the grooves" in the drum whenever the feedingof the unpasted bags is interrupted, and means actuated by said roller for preventing the said pad from smearing the drum with paste.

2. Tu a paper bag bottoming machine, the combination of the drum having circumferential grooves, and a pair of slitting rolls, one of said rolls being in operative engagement with the drum and having a spur which pierces and eects the spreading of the bottom end flaps of the bags, of a rotary paste pad geared to and driven in unison with the drum adapted to apply paste to the said flaps while the bags are passing a certain point, a roller disposed near the drum and adapted to engage said grooves when the feeding of the bags is interrupted, said roller being withheld from said grooves as long as the feeding of the bags is regular, and means for preventing the said pad from daubing the bare drum with paste.

3. In a paper bag bottoming machine, the combination with the feed and slitter rolls,

and a drum adapted to carry the bags dur-- ing the bottoming operations, of a roller movable towards and from said drum adapted to engage the bottom end flaps and to force and hold said flaps against the drum while the bottoms of the bags are being partially folded, means for applying paste to the bottom ends of the bags after the partial folding thereof, and means actuated by the extreme movement of said roller towards said drum for preventing the smearing of the drum with paste during thevintervals in which the feeding of the unpasted bags to a the drum' is interrupted.

4. 'In a paper bag bottoming machine, the combination with a drum adapted to carry the bags during the bottoming operation, of a rotary pasting device geared to the drum adapted to apply'paste to portions of the bottoms of the bags while the bags are being carried past a certain point, a roller normally riding on the drum in the path of the bags, a rock shaft for supporting said roller, and means actuated by said rock shaft for preventing said device from daubing paste on the circumference of the drum whenever the feeding of the bags is interrupted.

5. In a paper bag bottoming machine the combination of a pair of feed-rolls into which the paper tubes comprising the bags are fed. a pair of slitter rolls adapted to slit the bottom ends of the tubes for providing end flaps, and a mechanism for partially folding the bottom ends of the bags after they leave theslitter rolls, a drum adapted to receive the tubes from the slitter rolls and to carry them towardsa pasting position, an adjustable rotary pad adapted to apply paste to the bottom end flaps at the pasting position, a shaft for supporting and rotatin said pad, a sleeve slidable on said sha adapted to vary the strokes of said pad, a cam carried by said sleeve, a lever disposed in the path of said cam adapted to be rocked by the cam during the regular feeding of the said tubes, means for holding said lever rigid for effecting the endwise movement of said sleeve for preventing said pad from daubing paste on the bare drum whenever the orderly feeding\ of the tubes is interrupted, and a roller riding on the drum said sleeve in the direction for shortening the stroke of said pad, tension means for operating said sleeve in the opposite direction, a latch adapted to prevent the rocking of said lever, and a roller riding on said drum adapted to effect the operation of said latch.

7. In a paper-bag bottoming machine, the combination with the drum adapted to carry the tubes comprising the bags during the bottoming operation, a roller normally riding on said drum, means for spreading portions of the bottom end of each tube before it reaches said roller, means for swinging said roller away from the drum in advance of said spreading operation, means for moving said roller in the opposite direction for pressing the tubes against the drum, means for partially folding the bottom end of the tube, a pasting device adapted to apply paste to the bottom end of the tube after the partial folding is effected, and means actuated by the extreme movement of said roller towards the drum for preventing the paste from fouling the face of the drum whenever the orderly feeding of the tubes is interrupted.

8. In a paper bag bottoming machine, a drum adapted to carry the paper tubes comprising the bags during the bottoming operations, means for slitting the bottom ends of the tubes for providing foldable end flaps, means for partially folding the bottom ends of the tubes, means for spreading said end flaps before said partial folding, a roller adapted to press the tubes against said drum during the folding operations, means for moving said roller away from the drum in advance of the spreading operation to allow the spread flaps to pass between the roller and the drum, means for applying paste to the said flaps after the folding operation, and means controlled by said roller for preventing the daubing of the drum with paste whenever the feeding of the tubes is inter rupted.

9. A paper bag bottoming machine including a drum adapted to carry the flat tubes comprising the bags during the bottoming operations, a shaft geared to and driven by said drum, a paste pad mounted on and rotatiaaaa ed hy said shatt, said pad having a radial arm previded with a slot to receive said shatt, a sleeve siidahte en said shatt, Wedges carried hy said sleeve and dispes in the siet et said arm at the opposite sides at said shaft adapted when said sleeve is reeipreeated te meve said pad tewards and away tram said drama, a lever -apted to he ruched hy said sleeve White the tuhes are being fed regniarty into the machine, and means tor holding said m ilever rigid for operating said sleeve in the direction for preventing said path from danbing the paste 0n the bare drum Whenever the teeding at said tubes is interrupted.

11in testimony Whereet a i my signature. at

J'UEPH W. TAGGART.

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