US1936460A - Bag corner stitching machine - Google Patents

Description

NOV. 21, 1933. F cKs 1,936,460

BAG CORNER STITCHING MACHINE Filed May 5, 1932 Wiiness E2120? Patented Nov. 21, 1933 UNITED STATES PATENT OFFICE 1,936,460 BAG CORNER STITCHING MACHINE Application May 6, 1932, Serial No. 609,673, and

in Great Britain June 4, 1931 4 Claims.

This invention relates to bag cornersewing and like operations and is concerned particularly with machines, for example of the type described p in applicants pending application Serial No. a 550,255, filed July 11, 1931, which have external work supporting means adapted to provide support to faces of parts being sewn together at a right angle to one another and an internal worksupporting plate adapted to pass between the edges of the parts and engage the internal faces of the parts to support them against the thrust of the awl and needle.

In the sewing together of parts of certain forms F of bags, by a continuous scam, the beginning and end of which overlap to lock the stitches, it is necessary to withdraw the internal work-supporting plate from between the edges of the parts of the bag being sewn together so that the seam may be completed and overlapped.

' It is one of the several objects of the present invention to provide for the withdrawal along the line of feed, of an internal work-supporting plate such as above referred to when desired by the operator.

2 The nature of the present invention will become fully apparent to those skilled in the art from a consideration of the following description given by way of example and with reference to the accompanying drawing, of a preferred arrangement for withdrawing such an internal work supporting plate as has been referred to and of a preferred form of plate.

In the drawing:- Figure l is a front elevation of part of a bag corner sewing machine of the general kind referred to in the application hereinbefore referred to, when viewed across the lower face of the work support and embodying the said preferred arrangement and preferred form of plate;

Figure 2 is a plan view of some of the parts shown in Figure 1;

Figure 3 is a detail view partly in section showing a latching device in said arrangement; and Figure 4 is a sectional view on the line 4-4 of Figure l. V

The external work support, indicated at 1, is provided with surfaces which engage the external faces of the parts of the bag to be sewn together and which are arranged at an angle to each other so as to support the work with both faces adjacent a corner at an inclination to and intersecting the needle path. The external work support 1 has formed in it a recess 2 and a slot 3 in which a block 4 is slidably mounted for movement back and forth in the direction of feed of the work.

To the block 4 is secured a plate 5 which projects in the direction of feed between the edges of the parts to be sewn together and which forms an internal worksupport for the parts. Oneface of this internal work support cooperates with one surface of the external work support 1 to hold one of the work parts 6 in position, as indicated in Figure 4, and the lower edge of this internal work support cooperates with the other surface of the external work support to hold the other work part '7 in position. As so far described, the parts referred to are constructed and arranged to operate as in the machine of the pending application above referred to.

In the illustrated embodiment of the present invention the block 4 to which the plate 5 is secured is extended to the right when looked at from the front, and at this right hand end has a depending arm 8 which engages between projections 9 on a member 10 slidably mounted on a horizontal bar 11 extending across the machine parallel to the line of feed, and fixed at its left hand end to the awl feed slide, part of which is shown at 12. The arm 8 and projections 9 allow of the angular adjustment of the external Work support 1. A spring 13 in the member 10 bears against the end of the bar 11 and tends to move the member 10 and plate 5 to the right in Figure 1. The member 10 has pivoted on it at 14 a latch 15 adapted, when the plate 5 is in operative position, to be held in engagement with a recess 16 in the bar 11 by a spring 17 to lock the member 10 and bar 11 together so that the plate 5 moves with the awl 18 in its feeding movements. When the latch is released from the recess 16 in the bar 11 the member 10 and plate 5 are moved by the spring 13 to the right (Figure 1) so that the plate 5 is withdrawn from the work along the line of feed and moved about three-quarters of an inch to the right from its operative position into an inoperative position where it does not interfere with the continued operation of the machine.

The said preferred form of plate 5 is of a stiff springy nature and its left hand end presses one part of the bag against the face 19 of the ex- 0 ternal work support and holds it sufficiently to support the workpiece against the thrust of the needle without the workpiece being backed by a horn so that in this arrangement it is not necessary that a horn be used. When the plate 5 is 9 moved into its inoperative position its left-hand end springs back behind the face 19 so as to allow the bag then being sewn without the aid of the plate to pass in front of it. When the plate 5 is moved into operative position its left-hand end slides over an inclined face 20 which guides it on to the face 19. The left-hand end of the plate is extended as shown at 21 about nve-sixteenths of an inch to the left so as to give added support to the workpiece above the points of penetration of the awl and needle and the lower edge of the plate where part of the bag passes beneath it is bent forwardly as shown at 22. When the plate has been moved into its inoperative position the operator holds the bag against the external supporting means while the sewing is completed.

The invention having been thus described, what is claimed is:

1. In a machine for sewing bags or similar articles, an external work support provided with surfaces arranged to support the work with both faces adjacent a corner at an inclination to and intersecting the needle path, an internal work support passing between the edges of the parts being sewn together, and means for retaining the internal work support in operative position while permitting its withdrawal from work supporting position and from between the edges of the work parts during the sewing operation.

2. In a machine for sewing bags or similar articles, an external work support provided with surfaces arranged to support the work with both faces adjacent a corner at an inclination to and g, intersecting the needle path, an internal work being sewn together, a feed slide and a connection between the feed slide and the internal work support for actuating the internal work support from the slide while permitting an actuation, under the control of the operator, of the internal work support during the sewing operation to withdraw the internal work support from work supporting position and from between the edges of the work parts.

3. In a machine for sewing bags or similar articles, an external work support provided with surfaces arranged to support the work with both faces adjacent a corner at an inclination to and intersecting the'needle path, a feed slide, an internal work supporting plate passing between the edges of the parts being sewn together, a slide mounted in the external work support to which said plate is secured, and means including a manually operable latch detachably connecting said last mentioned slide and the feed slide.

4. In a machine for sewing bags or similar articles, an external work support provided with surfaces arranged to support the work with both faces adjacent a corner at an inclination to and intersecting the needle path, and an internal Work support comprising a plate extending in the direction of feed between the parts being sewn together, said plate having a portion extending across the plane of the awl and needle paths.

' FRED RICKS.

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