US2220333A - Wire stitching machine - Google Patents

Description

Nov. 5, 1940.

R. G. HOFFERT I I 2,220,333 WIRE STITCHING MACHINE Filed May 11, 1940 IHII Patented Nov. 5, 1940 UNITED STATES PArENr OFFICE WIRE STITCHING MACHINE Roy G. Hoffert, Racine, Wis. Application May 11, 1940, Serial No. 334,561

4 Claims.

Wire stitching machines constructed substantially like the one disclosed in Patent No. 52,- 011, to Arthur H. Maynard, issued January 1, 1918, are now being manufactured and sold by a corporation with which I am associated. Many of such wire stitching machines are now being used for closing small Cellophane bags containing candies, nuts, etc. It is the present practice to provide each of such bags with an opening above the staple so that a series of bags may be hung on a hook inserted through said openings for displaying the bags and their contents.

The object of my invention is to combine with a wire stitching machine, a punch device for punching an opening in a bag or other article, in position properly spaced above each staple and being automatically operated by the wire stitching machine.

More specifically, it is my object to provide a combined wire clincher and punch in the form of a self-contained unit, of simple, durable and inexpensive construction mounted upon the machine base and separated from the stitching mechanism and readily and easily accessible for adjustment or replacement of parts without interfering with or removing any of the stitching mechanism, and further to provide means for operating the combined wire clincher and punch unit by power from the motor transmitted through means separate from and independent of the means for operating the stitcher mecha nism, and whereby the relatively delicate and sensitive mechanism of the stitcher will not be afiected by the operation of the wire clincher and punch unit.

A further object is to provide combined wire clinching and punching operations properly timed relative to each other and to the stitching 0 mechanism so that during the instant that the bag is gripped and the staple inserted, the wire clinching and punching operations are completed to thereby avoid any movement of the bag during these operations, which might result in failure of one or the other of said operations.

In the accompanying drawing Figure 1 shows a side elevation of a complete wire stitching machine embodying my invention, with parts of the base broken away to show the clincher and punch operating mechanism;

Figure 2 shows an enlarged front view of the clincher and punch unit, and a portion of the stitcher head; and

Figure 3 shows a sectional view of same on the line 33 of Figure 2.

The staple-forming and inserting mechanism forms no part of my present invention and is not herein fully disclosed. A stitcher substantially like that disclosed in said Patent No. 1,252,011 may be used. It comprises a frame ID, a power 5 shaft Ilhaving a hand wheel l2 fixed thereto and driven by an electric motor, not shown. That part of the stitching mechanism shown is indicated generally by the numeral l3. A staple like that shown at M, Figs. .2 and 3, is formed 10 in the stitching mechanism and then pressed down with its free ends projected through the article l5 being stitched. The wire for forming the staples is carried upon the large spool l6. After the staple has been forced through the Cel- 16 lophane bag or other article I provide means for clinching the staple and at the same time punching an opening in the bag. I have provided the following mechanism for this purpose:

In the base of the frame below the stitching 20 mechanism is a clincher slide l1 mounted for vertical sliding movement within the frame member [8; the heads of the screws I9 overlap the clincher slide ll, as shown in Fig. 2, and hold it against forward movement. Fixed to the 25 upper end of the frame member [8 are two pivot pins 20, and a clincher cam is mounted on each pin. This cam comprises a body portion 2| having a notch at its upper end to receive the pin 20. The cam is substantially triangular in shape, 30 and on both side edges there is a wire-receiving and guiding groove 22. At the wide end of the cam there is a circular recess 23. The cams are within the frame members, and, as shown in Fig.

2, their inner ends are engaged by the clincher 35 slide. As shown in Fig. 3, the clincher slide is formed on its rear face with a recess at 24, into which recess the lower outer corner or arm of the cam will enter when the cam is swung to its upper limit. By forming these cams as shown 40 and described, they may be reversed when one of the-grooved edges is worn by the wire.

After the staple is inserted in the bag and there held stationary by the stitcher mechanism, the clincher slide is elevated and this moves both cams upwardly and toward each other, thereby effecting a clinching movement of the staple.

For the purpose of punching a hole in the bag during the instant while the bag is being held 50 and the staple clinched, I have provided a punch-supporting block 25 detachably secured to the back of the clincher slide plate I! by the set screw 26 and capable of vertical movement in the recess 21 in the frame. The punch 28 is 55 extended through this block 25 and adjustably fixed thereto by the set screw 29.

On the top of the base at its front end is a combined punch plate and bag guide having a slot 3| in its front edge toreceive bags to be stitched and punched and to control the distance to which the bags may be inserted. A punchreceiving opening 32 is formed in the plate 30 in line with the punch.

It is desirable thatthe staple and the punched hole be properly spaced from the folded edge of the bag, and for this purpose I have provided, at each side of the base adjacent the slot 3|, 2. regulating plate comprising a body 33 pivoted by the screw 34 to the side of the base and having a laterally extended arm 35 with an upright portion in line horizontally with the slot 3!. This plate has an arcuate slot 36 through which an adjusting screw 31 is extended and by which the bag-engaging arm 35 may be fixed in various positions to engage; and hold bags in the desired position for receiving the staple and.

pun Ch For actuating the clincher: cams and'the punch in properly timed relationshipwitheach other and with. the stitching mechanism I. have providedalever 35 fulcrumed-in the base at.31 and:

having its front end: at 3.81 extended through an opening 39 in the clincher plate I'L. At the rear' end of the lever 36;-is pivoted a.rod 40extende'd;

upwardly through the frame and-guided'thereby, and at the upper endof the rodis aroller 41. in

engagement with acam 42. on. the main shaft.

H, which is' preferably driven by a motor not shown. A spring 44 is applied to the forward end of the lever 36 tonormally. moveit down-- wardly..

With the construction described, and assuming that the main shaft II is being rotated and the stitching mechanism, not shown; is being'operated thereby to force'a'staple through a bag in the slot 4|, then on the instant after thes'taple is passed through the bag-the cam 42 operates the lever 36. and moves'th'e clincher cams. and.

punch upwardly at the same time,.thereby completing the operation of clinching the staple and punching the hole in the bag. These clinching and punching operations. are performed by me-' chanisms entirely. independent from thestitchingmechanism,exceptlthat-both are powered by the main shaft andv in that manner are properly synchronized; also the clincher and. punch are 'spacedapart fromthestitching mechanism for easy accessibility for repair or replacement of parts.

I claim as my invention:

1. In a wire stitching machine, the combination of a base to receive a bag or other article to be stitched, means above the base for forcing a wire staple through a bag, a plate mounted for up and down movement below said base, two clincher cams operatively connected with said plate and moved to and. from clinching position with the plate, a punch connected to said plate and movable With it, said base having a punch opening formed therein to cooperate with the punch, and means for operating the plate.

2. Ina wire stitching machine, the combination of a base to receive and support a bag or other article to be stitched, a stationary member above said base havinga punch opening therein, means above the base for forcing a wire staple through the bag, a sliding clincher plate below said base, two" pivoted: clincher cams operatively connected with the: clincher. plate. and pivotally supported below saidbase, and a:punch'fixed to said clincher plate. below. said: base, and movable with the clincher plateto position for co-operating with the punch opening: above; the base.

3; In. a wire stitching. and. punching machine, the. combinationof. a base to. support a bag or other. articleto be stitched, a'member overlapping saidbase'an'dhaving. a punch opening, a clincher slide plate.- mount'ed for vertical movement below the base, clincher.camsvoperatively connected to the slide plate, a punch block fixed to the slide plate, means for. guidingsaid block, and a punch fixed to the block for: cooperatingwith said memher. having a: punch opening.

4. In a Wire -stitching machine, the combination of a base to. receive a bag or other article to be stitched, means above the basefor forcing a wire staple through. the bag, a plate mounted for up and'down movement-below said base, two clincher cams operatively connected withsaid plate and moved to and from clinching-position with the plate, a punch connected to said plateiand movable With it, saidbase having a punch opening; formed therein to;-cooperate with the punch, and

means for operating*the:plate, said means comprising a power' shaft, a cam operated thereby, a lever fulcrumed to." the frame, means. for'tiltingthe lever by said cam, the forward end of the'

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