US1792678A - Bag-bottoming machine - Google Patents

Description

Feb. 17, 1931. A. c. COTY ET AL 1,792,678

BAG BOTTOMING MACHINE Filed Aug. 30, 1929 4 Sheets-Sheet 1 I V NT RNA 4W ATiRNEiS.

Feb. 17, 1931. A. c. coTY ET AL BAG BOTTOMING MACHINE Filed Aug. 50, 1929 4 Sheets-Sheet 2 III.

4, v a INE/AE TOR. By 6M0 W m afiomvm s Feb. 17, A Q COTY ET AL BAG BOTTOMING MACHINE 4 Sheets-Sheet 3 Filed Aug. 30, 1929 INVENTOR E M .fl l mg 1 ATTORNEYS.

Feb. 17, 1931. Q CO'TY ET AL 1,792,678

BAG BOTTOMING MACHINE Filed Aug. 30, 1929 4 Sheets-Sheet 4 INVENT R 4a BYQQMQM M W q,

WJEYS.

Patented Feb. 17, 1931 UNITED STATES PATENT OFFICE. Y

ALFRED CLEMENT GOTY AND THOMAS EARL COTY, OF WATER'I'OW'N, NEW YORK BAe-Bo'r'roirmG MACHINE Application filed August 30, 1929. Serial 1T0. 389,401.

Our present invention relates to bag bottoming machines, by which we mean devices for folding and pasting the ends of b-lanks cut off from a continuous paper tube. The pres 5 cut embodiment of the invention deals with lengths cut off a previously-prepared tube, which are stored in a magazine adjacent to the machine prior to the action of the apparatus illustrated in this case.

The machine which we have devised is especially adapted to forming in a single operation so-called valve bags, in which one end of the bag is sealed and the other only partially so, and is particularly adapted for mak: ing these of the heavy paper required for-cement or other materials of considerable Weight and bulk, though not restricted in that respect. In these v bags one end is closely sealed after being formed and folded, and the other end is sealed in part only, leavin an opening by which the bag may be filled. This opening is afterwards closed in filling the bag. Generally speaking, these bags have been heretofore formed in separate machines,

one for each end; one end being closed, and

the bag then transferred to another machine Our present invention, therefore, embodies preferably the tandem location .of mechanism for forming each end of the bag in the way indicateihand an intervening mechanism between the apparatus closing one end of the bag an d that for forming the other end, which receives the bags from the first machine and reverses them so that the open end is presented to the action of the second machine. This involves as we believe a new method of operation, greatly accelerating the speed and increasing the output to an extent which has not heretofore been attained. point out in the claims defining our invention, it embraces mechanical combinations necessary for forming both the sealed bottom and the valve end of the bag in a single unitary structure, all the parts of which are so timed and related asto co-o )erate in forming the completed product. 0 far. as we are advised, this combination of mechanisms is new.

The accompanying drawings show an embodiment of our invention. Figure 1 is a 59 side elevation, partly broken away as to the Also, as we second one of the bag-forming mechanisms,

and showing the gearing of the apparatus of the whole organization. Figure 2 is a side elevation upon a larger scale of the apparatus shown in the east end of Figure 1, with the gears removed so as to show the bag-bottom ing mechanism, and the magazine with its feeder. F i ure 2a is a view of one end of the bag tube, s owing-the application of paste thereon. Figure 3 is a representation similar 0 to Figure 2 of the west end of the arts shown in Figure 1, showing also partlcularly the reversing device or cylinder by the movement of which the bag is turned over to present its unfinished end to the second mechanism. 65 Fl%l lle 4 gives a plan view of the parts shown in igure 3. Figure 5 is a detailed section upon theline 5-5 of Figure 2 of the creaser cylinder. Figure 6 is a section on the line 66 of Figure 3 of the reversing cylinder. 79

Figures 3a, 3b, 3c, are sketches of the be in yarious stages of completion; and Figure is asketch ofthe bag complete. Figure 1 shows at A the frame of the machine, which, as illustrated is cast in various units of different sizes and shapes, which are fitted together to make the complete machine,

and secured in any desired way, as by dowelpins to secure precise positioning, and bolts 'or other fastening devices, which are not 80 shown but are well known-to machinists. We have not deemed it necessary to describe all the different parts of the frame as they are sufiiciently indicated in the drawing, and may be indefinitely varied. B is the magazine containing the cut-off blanks B B is the feeding device for the blanks, which is illustrated in other Figures, but the construction of which is fully detailed in our Patent No. 1,668,761, bag feeding machine, datedMay 8, 1928, and which it is therefore unnecessary to describe in detail. The parts indicated generically by the reference letter C are for forming the bottom of the bag, as shown, for example, in Figure 3a, and hereafter more fully described. D indicates a cylinder for the creaser knives; E is a paste mechanism; F

is the bottoming cylinder, which in some of its broader aspects is claimed in our Letters- Patent No. 1,7 42,17 4, dated December 31, 1929, A

Serial Number 723,031, paper bag machine, filed June 28, 1924, and is described in detail and claimed in our pending application, 278,- 459, bag machine, filed May 17, 1928, and which will be briefly described in connection with Figure 2. G indicates the reversing cylinder, more particularly described in connection with Figure 3. At this point the position of the bag is reversed, and it is started through a second organization of instrumentalities, being turned over from the position shown in Figure 3a to that shown in Figure 3b.

The whole group of instrumentalities effecting this bears the reference letter Gr with various exponents. H is the co-operating cylinder for the creaser blades of the second apparatus. I is the bottom-forming mechanism of the second apparatus; K is the pasting mechanism, similar in its general character to the one marked E, differing slightly in the form of the shoe or pad which prints the paste at E upon the bag, as shown in Figure 30. After the application of the paste. and the folding over of the flaps, the bag is in the shape shown in'Figure 7, and passes out of the machine, beingremoved by any convenient conveying device, not illustrated.

Figure 2 shows an organization for forming the bottom of the bag, which is substantially like that shown in our application, Serial Number 278,459, already referred to. Here B represents the bag-feeding device, shown in our Letters-Patent referred to, which selects out the bottom bag from the pile shown at B1, and passes it into the machine.

This device consists of the feeding blades 6, 5 which oscillate and pick off the bottom one of the bag blanks, which is then turned into the machine by means of a revolving segment 6 and a hook-shaped member B3, the feeding roll B co-operating with these to pass the end of the bag, having the thumb tag, as is usual, to the feed-rollers, C, C The bag then passes on to roll C where the upper flap is engaged by the pin 0 and the lower flap by the hook 0 upon the roll C This hook is operated by the stationary cam C and holds the lower flap of the bag until it is brought around to be engaged by the roll C.

In the meantime the link C operates a finger C by means of a crank-arm C so that the finger holds open the flap which has been pulled open by means of the pin 0 the crankarm C is operated by the link C by means of the cam-roller 0 operated by the rotary cam C so that the motion of the finger C is regulated to hold open the upper side of the bag, while the finger 0 moves down at such a rate as not to tear the bag, while still holding it open; when the roll C engages the bag, the finger is practically in alinement with the opening between the rolls C, C, and the bag easily slides off it, after which the finger C is returned to its illustrated position. All this is fully described in our application, S. No. 278,459, referred to and need not be detailed further. The bag continues its course between the feed-rolls 0 C, until it is engaged by the cylinder D and the belts or tapes L, L These tapes are-in pairs on opposite ends of the cylinder as indicated in Figure 4. The construction of this cylinder D, as indicated also in Figure 5, is identical with that of the cylinder H in the apparatus for forming the second closure of the bag. In general, it consists of the cylinder D and the cross-arm D these being secured together by adjusting devices (1, which permit the adj ustment of the pads or slot-carrying parts D upon the ends of the arm D with reference to the creaser-blades and the other slot bars D D The purpose of this adjustment is to enable these pads to re ister with the knives K K consisting 0 arms carrying creaser-blades for forming and turning up the flaps, which are to be folded by the cylinder F.

A second one of these knives or creaserblades K registers with the slot-carrying bar D carried by the cylinder D; after the flaps are creased in this way, the bag passes on and is engaged by the belts L, L The belt L is kept taut by a belt-tightener L of common form, and belt L is similarly tightened by such a device marked L at the top of Figure 2. Of course these belts or tapes are run upon suitable guide-rollers, as is well understood.

While passing the cylinder D, paste is printed on the closure of the bag, as shown at e Figure 2a, by means of the pad 6 carried upon the roll E of the paste-printing mechanism E. The pad (2 takes paste from a feeding roller E which is carried upon a springoperated arm E and revolves in the pastetank E As will be observed the shape of this paste-pad is such as to make a complete closure of the bag 13 when the flaps are folded over.

Passing on from the cylinder D and the creaser-blades K K between the belts L, L the bag engages with the folding cylinder F, which carries two sets of folding blades F F and F F so that two bags may be operated upon at the same time by the single cylinder. A bag is, shown'with the flaps b b projecting between the disks, which constitute this cylinder, so called for convenience. the construction being particularly described in our application 278,459, already referred to.

The blade F presses down upon the flap b by a movement which first folds over the flap, and then presses it down and holds it in place until the flap b is similarly folded over and held down by the blade F the timing being such that the blade F is Withdrawn just as the second flap is folded over. These blades are controlled in their action by the meagre stationary cams F, F, and are operated by cam-rollers running upon the edges of these cams, and also by others in grooves 7' 7' in their cam-faces. The positions of the cams are maintained by bars F, only one of which is shown,-and there is the usual adjusting device F After leaving the cylinder F the bag passes on between the tapes 14L, and the rollers with that for forming the valve end. Figure 3 should be read in connection with Figure 4.

The cyhnder G is 1n reality composed of.

v two disks spaced apart on a central shaft the illustrated position.

and which are tied together by crossbar-s 9 against which the crank-levers G G clamp the bag and it is also provided witha stationary cam G having an adjusting device G so that the timing of the arms G G", may be regulated. Crossbars G G support over the cylinder cylindrically-formed strips of metal which act to guide the bag. G is a feed roller or disk, working in conjunction with the mutilated'roll G". This roll has two diameters in its diiferent parts, one, 9 being cut away, and the other, 9*, registering with the roll G. I

A roll G is also provided having a fixed cam g the bell-crank lever g, and the outer end of the bell-crank is formed with a hook, the action of which is presently to be described. A feed-roller g co-operates the roll G; and a roll G havingtwo difierent diameters at diflerent parts of the circumference, as illustrated, acts as a feed for the bag.

The operation of the parts is as follows When the bag leaves the belts L, L in the upper right-hand side of Figure 3, and passes down between the rollers Gr and G, it is engaged by one of the hooks or bell-crank levers G, and carried with the revolution of the roll between the rolls or disks G, G, the cut-away portion G of the roll G being then adjacent to the roll G. The bag continues in this clock-wise direction until just as the end of it is about to pass between the rolls G, G, at which time the bell-crank lever, which holds it at the front end, is released by the cam projection 9 By this time the larger diameter of the roll G at g has reached the roll G, and engages the surface of the bag, the osition of which is thus reversed as it is reed from the bell-crank, in It should also be stated that the bell-crank levers are operated b the projection g on the cam G, so that tii ey are lifted just at the time when the bags engage with them in succession, and immediately runnin oil the projection g? clam the ends of the ags tightly against the r01 G.

By this time the hook g has rotated until it is directly opposite the end of the bag as the rolls G G project the bag into the hook. This hook does not engage with any other parts of the machine, but is adjusted relative to 1ts engagement between the roll G and the roll. C.

As soon as the bag has been pressed against the hook g so as to locate the end of it definitely with reference to the succeeding operations, the cam-roller g is operated by the high part of the cam g, and the hook is re moved from the end of the bag, permitting it to pass freely to the roll G, the larger di-v ameter of which then engages with the roll C at the definite point indicated by the designer. The entry of the bag to the rolls G and g is thus timed correctly, after which cam-roller g rides off the high spot of the cam, retiring the hook g.

The roll C and its co-operating parts are precisely like the rolls C C. shown in the east end of the machine in Figure 2. The finger C is similarly operated, as is also the hook, and the bag passes on afterhaving its end opened, between the rolls C C C C, and engages with the belt L and the creaser pad-roll H, which is also like the roll D of Figure 2. A paste-pad is shown at k on the roll K for applying paste; but this pad, as indicated at 6? Figure 3, is so designed as to print pasteupon only two sides of the opening, the efiect being to leave the part of the bag marked 6 unsecured so that the bag maybe filled, after which its flap is blown shut as the bag is filled.

In Figures 3 and 4 appears a'guide rod G one being on each side of the path of the bag; these act to straighten the bag at the time the grippers G, G let go and rolls G. G take hold.

of the roll H, which is like the roll I) of Figure 2, and of the cross-bar with its pad- H while the rim of the roll is marked H and the adjusting boltsare marked H".

In Figure 6 I have shown a cross-section of the reversing roll G; the reference characters being the same as shown in Figure 3, further description of this figure seems to be unnecessary. Similarly a detailed description of Figure 4, the reference characters of which are the same as those of Figure 3, seems unnecessary; a

1 The operation of the various gears co-ordinates the movements of the parts of the machines, a belt 1 driving a pulley from which all the gears take their motion and a longitudinal shaft 2 transmitting motion derived from a bevel-wheel on the main pulley-shaft to a similar Wheel on one of the gear-shafts of the second part of the apparatus, wh ch! forms the valveend of the bag. These bevel; are cut away in Figure 1 to show the spurtin gears on the same shafts, but one set of them is shown at the left in Figure 4.

Many obvious changes may be made in the arrangements without departing from our invention.

While we have spoken herein of reversing the movement of the bag, and in a sense this is true, what happens is the reversal of the position of the bag relative to its movement through the machine; since obviously it proceeds from one end to the other of the apparatus in substantiallyuninterrupted progress.

We believe ourselves to be the first to provide a fully automatic apparatus which closes one end of a bag and then by a substantially continuous mechanical process forms the other end alsd, closing it to the desired extent and discharging the completed bag from the machine. 'VVe also believe ourselves to be the first to do this by bottoming the bag and then turning the bag end for end so that its open end is presented to the second bottom er, such reversal being effected by means maintaining positive mechanical engagement between the reversing mechanism and the blank during the passage, so that the blank is never free from control, and does not interfere with the others of the series; it is to be understood that we do not, by describing in this case a magazine of previously prepared blanks, limit our invention to that construction.

What is claimed as new herein is 1. In machines for making bags, a magazine for tubular blanks, bottoming mechanism for closing one end of each blank in succession, feeding mechanism for passing the blanks successively from the magazme to the bottoming mechanism, bottoming mechanism for closing to a desired extent the other end of each blank in succession, and means intermediate of the two bottoming mechanisms for reversing the positions of the blanks successively with reference to the direction of motion through the apparatus; such means automatically maintaining positive engagement with each blank from its release by the first bottoming mechanism until it is engaged by the second.

2. In machines for making bags, means for feeding tubular blanks, means for closing one end of each blank, means for reversing the position of the blanks, such means positively engaging the blank during the entire reversal, means for feeding the blanks in reversed position, and means for closing the other ends of the blanks to a desired extent; the said several means being co-ordinated to act automatically upon a succession of blanks, as described.

3. Reversing mechanism in a bag-making machine comprising a cylinder, grippers carried thereby holding a bag-blank against the cylinder for travel in one direction, means for causing the bag to move in the reverse direction, and means for releasing the grippers when the last-named means acts, as described; whereby the bag-blank is turned end for end while continuing its progress through the machine, and is at all times positively engaged.

4. Reversing mechanism in a bag-making machine, comprisin a cylinder, a gripper for holding a bag-blan against the cylinder, a

cam for releasing the gripper and a spring A for holding it closed, and a pair of gripping rolls for moving the bag in the opposite sense; the whole so timed that the gripper is released by the cam at the time the gripping rolls engage the bag blanks whereby the blank is turned end for end relativ'e to its progress through the machine.

5. In amachine for making bags, and in combination, means for feeding tubular blanks, bottoming mechanism closing one end of, each of the blanks in succession, a reversing device for the blanks by which they are successively turned end for end with reference to their progress through the machine, the device comprising a cylinder revolving around a fixed cam upon a horizontal axis, grippers operated by the cam and holding the bag-blanks successively upon the cylinder, gripping rolls for engaging the open ends of the blanks at desired times, the cam-surface being formed to open the grip pers to receive the blanks and to open them a second time to release the blanks when the latter are engaged by the gripping rolls, and bottoming mechanism for closing the open ends of the blanks to a desired extent.

6. As a unitary mechanism for making bags, a bag-bottoming apparatus for forming and closing one end of a tube forming a bag-blank, a second apparatus for forming and for closing to a desired extent the other end of the tube constituting the blank. and positive automatic mechanism for receiving the blank from the first apparatus and pre senting it to the second in co-ordinated relation for such forming and closing; such mechanism positively engaging the bag-blank during the time of transfer from one bottoming apparatus to the other.

7 In a bag machine, means for closing one end of a bag-blank; means for closing to a desired extent the other end of the bag-blank; and positive automatic means in continuous engagement with the blank for transferring it from the first named means to the second and turning it end for end while so doing.

8. As a reversing mechanism for a bagblank in a paper-bag bottomer, a,- cylinder, gripping fingers for receiving an end of the bag-blank, means for engaging the bag separate from the fingers and operative to reverse the movement of the bag, and means for releasing the fingers at the time the reversing means acts; the whole so timed and acting that the bag-blank is under continuous mechanical control during the entire reversing operation.

9. As a reversing mechanism for a baglblank in a paper-bag bottomer, a cylinder, gripping fingers for receiving an end of the bag-blank, means for engaging the bag separate from the fingers and Operative to reverse the movement of the bag, and cams and cam-rollers operating to release the fingers when the reversing means acts.

Signed at Watertown, in the county of J efferson and State of New York this 22nd day of August, A. D. 1929.

ALFRED CLEMENT COTY. THOMAS EARL COTY.

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