US1495424A - Feeding and cutting attachment for sewing machines - Google Patents

Description

may 27 192%.

W. J. MORGAN FEEDING AND CUTTING ATTACHMENT FOR SEWING MACHINES Filed April 5, 1922 Patented May 27, 1924.

WILLIAM J'. MORGAN, OF ST. LOUIS, MISSOURI, ASSIGNOR OF ONE-HALF TO EVR KLEAN SEAT PAD COMPANY, OF ST. LOUIS, MISSOURI, A CORPORATION OF MISSOURI.

FEEDING A D CUTTING ATTACHMENT Fo'R SEW NG MACHINES.

Application filed April 5,

To all whom it may concern.

Be it known that I, WILLIAM J. MORGAN, a citizen of the United States, and residing at St. Louis, Missouri, have invented the new and useful Improvement in Feeding and Cutting Attachments for Sewing Machines, of which the following isa specification.

This invention relates to a machine for making strips, and more particularly to an attachment for a sewing machine whereby a strip is folded, stitched and out into pieces.

Where material is formed by folding, and then stitched and out 011', it is necessary to employ in addition to the folding, stitchforming and strip feeding mechanisms, a cutter which moves across the strip and severs it into suitable lengths. As, however, in practice the operation of the stitch-forming as well as the work feeding mechanism should be very rapid in order to increase the capacity of the machine to a maximum, and since thereis an appreciable time period required for a cutter to sever a strip and move back out of the way, it invariably happens that the strip portion between the stitchforming and feeding mechanism and the cutter will buckle; and where the strip is of a heavy material, such as canvas, cretonne or tailors fabric, this buckling is liable to stop the movement of the strip after the cutter is again moved out of the ath of the strip.

One of the objects of t is invention, therefore, is to provide a machine of the character described whereby buckling of the strip is prevented so as to insure movement of the strip in the direction of the cutter.

Further objects willappear from the detail description taken in connection with the accompanying drawing, in which:

Figure 1 is an elevation, partly in section, of the mechanism embodying this in vention;

Figure 2 is a plan of the attachment;

Figure, 3 is an end view, showing the cutter;

Figure 4 is a detail showing the mounting of the gearsfor' adjusting the length of the cut strips;

Figure 5 is a ing the fpresser omitted and the resultant action in the buckling of the strip; and

Figure 6 is a detail section of the strip as completed.

Referring to the accompanying drawing detail of Figure 1, but show- I 1922. Serial No. 549,920.

and more particularly to Figure 6, the strip S is shown as formed of a tripled piece of material which is folded in suitable form and is secured by a seam E. These strips are used for various purposes, such as belt loops, coat loops, etc., and are usually made of canvas, cretonne or tailors fabric which is folded, stitched and then cut into suitable lengths.

As heretofore noted, the device may be an attachment to a sewing machine which is, in this case, shown as being of the chain stitch: type comprising a base 1, a standard 2 upon which is mounted a table 3, a head 4; carrying the usual resser-foot 5 with its lifter 6 and the needle 7 receiving. the thread 8. The standard carries a rotating hook 9 where, as in this case, the machine'is i of the chain stitch type, and a feeder 10 is provided for feeding the work along the table and underneath the presser-foot. A folding attachment 11 is also fastened to the table and this attachment receives the material and forms it into the shape of a triple strip underneath the resser-foot and above the feeder. The parts so far described may be of any suitable and usual construction, and a further detail description thereof is, therefore, unnecessary.

Mounted on a standard or bracket 12 is a cutter 13 having a blade 14 coacting with an opposed cutting edge on the bracket. cutter is in this case pivoted at 15 and is acted upon by a spring 16 which'normally holds the cutter raised while the end of the cutter is provided with a roll 17 in the path This of a cam 18 on a gear wheel 19 mounted for rotation on a bracket 20. With this gear meshes a' pinion 21 fastened to a gear 22 loosely mounted on a shaft 23 adjustable in a slot 24 on the bracket 20 and clamped in any adjusted position. The gear 22 meshes with a'pinion 25 on the main shaft 26 of the sewing machine.

.-,Arranged between the table 3 and the cutter is a channel-shaped guide 27 which extends from the presser-foot and stitch-forming and feeding mechanism to the cutter and has at its entrance a guard 28 taking over the guide and at its other end an inclined positioned guard 29 also over the guide and terminating close to the knife 14.

Assuming that the machine is operated so as to rotate the gear 19in the direction of ever, as the cam 18 again engages the roll,

the cutter will be moved down so as to sever the strip. The length of the strip thus fed before it is severed can be varied by the substitution of gears 22 of different sizes, the

slot 24: which is concentric with the gear 19, allowing for such different-sized gears.

Upon reference to Figure 5, it will be seen that since the cutter is moved into the path of the strip while the stitch-forming and feeding mechanism is operating and accordingly While the strip is being fed, the strip will be arrested at the cutter while the portion between the cutter and the stitch-forming and feeding mechanism will continue to be fed. This pushing action on the end of the strip nearest the stitch-forming and feeding mechanism will cause the strip to buckle as shown in Figure 5, with the result that when the cutter again rises, the strip will continue to hang at the edge of the guard 29 and kink and pile up without being fed past the cutter. This is especially true if the machine operates at a very high speed as is desirable and even necessary during practical operation.

Tn accordance with this invention a weighted presser 30 is pivoted at 21 on the guide so as to bear on the strip, in a direction towards the guide, with a yielding pressure. This presser extends along the guide and is suitably rounded along its lower surface so as to not interfere with the movement of the strip; however, by its weight on the strip it serves 'to prevent buckling of the strip, so that even if theend of the strip is arrested during the cutting operation while the stitch-forming and feeding mechanism continues to move the strip along the guide, the strip will not kinkor buckle as previously described, but will be given a gradual bow which is uniform from the cutting end to the feeding end of this strip. Accordingly, as the presser is gradually raised by this bowing, it will bear with the yielding pressure due to its weight on the strip, so as to not only cause a uniform bow and prevent buckling or kinking, but as the cutter again rises, the pressure on the strip by the presser will have the action of straighteningthe bow and causing the end of the strip to move past the cutter until thestrip 1s again fiat on'the guide as shown on Figure 5. In this way, movement of the'strip along the guide is insured at all times, thereby enabling the machine to be run at a very high speed.

lit is obvious that various changes may be made in details of construction without departing from the spirit of this invention; it is, therefore, to be understood that this invention is not to be limited to the specific details shown and described.

Having thus described the invention, what is claimed is: N

1. In a machine for making strips, the combination with stitch-forming mechanism, strip feeding mechanism and a presser foot,

of a cutter spaced from said presser foot along the line of feed and operating transversely thereof in order to out off the strip while the feed continues, a guide from said mechanism to said cutter, and means spaced from said cutter and bearing on the strip between said cutter and said presser foot adapted to prevent buckling of the strip.

2. Tn a machine for making strips, the combination with stitch-forming mechanism, strip feeding mechanism and-a presser foot, of a cutter spaced from said presser-foot along the line of feed and operating transversely thereof in order to out off the strip While the feed continues, a guide from said mechanism to said cutter, and a strip presser spaced from said cutter and movable towards said guide. 7

3.. In a machine for making strips, the combination with stitch-forming mechanism and strip feeding mechanism, of a cutter spaced from said mechanism, a guide from said mechanism to said cutter, and a strip presiser pivoted on and extending along said m e. g 4. In a machine for making strips, the combination with stitch-forming mechanism, strip feeding mechanism and apresser foot, of a cutter spaced from said presser foot along the line of feed and operating transversely thereof in order to out OK the stri while the feed continues, a guide from sai mechanism to said cutter, means for moving said cutter to sever the strip while said mechanism is operating, and means spaced from said cutter for preventing buckling of the strip.

5. In a machine for making strips, the combination with stitch-forming mechanism, strip feeding mechanism and a presser foot, of a cutter spaced from said presser llfl foot along the line of feed and operating

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