Patent GB-112995-A (GB)
Title: Improvements in or relating to Tubular Bags made of Fabric or the like and Closed at one end by a Cap or Disc of similar Material which is Secured to the Tube by Sewing.
IPC: D05B13/00
Filed: 1917-02-05
Abstract: 112,995. Ainley, H. F., and Debenhams, Ltd. Feb. 5, 1917. Sewing, work-holders for; sewing-machines; work supports.-Tubular bags of fabric &c. are closed at one end by a flanged disk or cap of similar material inserted with its crown inwards and secured by sewing, the crown of the cap being then brought about flush with the end of the tube. The disk a, Fig. 6, is pressed by a plug d into a tubular former c made elastic by slitting its end, the plug having a flange co-acting with a recees in the former. The fabric tube b is then drawn over the former till its end is flush with the edge of the disk a, which becomes of the cap form shown. The parts are then united by sewing at c. A plunger, introduced from the opposite end at the former c, then pushes out the plug d and brings the crown of the cap flush with the end of the tube b, where the parts may be further secured by overstitching by hand; or, when the plug has been removed, the bag is turned inside out, the margin of the ap then coming inside and being secured by sewing. Two rows of machinestitching are sometimes made, in which case, after the plug d has been forced out, the former c is pushed up to the end of the tube b, and is then forced back a little by pressing into it a plug similar to but thinner than the plug d; the crown of the cap is thus again forced inwards, and part of its margin and the extreme end of the tube b can then be united by the second row of stitching, as at i, Fig. 11, which shows the cap a ultimately pushed out after effecting this stitching. In a further modification, two rows of stitching e, i, Fig. 12, are made, and the crown of the cap is then pushed out. To assemble the parts a, b, the plug employed may be a disk d<2>, Fig. 13, which is placed in a recess P, l<2> in a die-piece l, the disk a being then la,id over it; an upper perforated diepiece k is then lowered and the former c is forced down so that the disks a, d<2> become held tightly within it, and can then be removed with it for completing the bag. For machine-stitching, the former c, Fig. 21, is rotatably mounted between a pin o and a clutch device on a shaft coaxial with it at its lower end The pin o is adjustably mounted upon the bar s carrying the usual presser-foot. or upon the bed or needle plate, and is perforated at t for the passage of the needle or is shaped to surround the needle path partly only. A tapered piece on the former c engages a spring- pressed sleeve on one of the clutch elements, the other element being driven by link work &c. from the oscillating shaft u. An inclined surface. v<1> on a plate v receives tho end of the former c. After making the stitch e. the former &c. may be removed to a machine of the overhead type, in which the overseaming is effected, the tubular former being mounted vertically and being yieldingly pressed against the usual feed-wheel, by which it is rotated. In place of the driving- arrangements described in connexion with Fig. 21, the lower end of the former c may rest against a spring and its upper en on a concaved feed-plate y', Fig. 24, while a curved presser-foot z presses the projecting fabric on to the usual feeding device 1; a guard y<2> may assist in keeping the former in position: With these arrangements, when stitching such as e, Fig. 12, has been effected, the former is pressed back, against the action of the spring referred to, by the presser z, the bar z<1> being, for this purpose, partly rotated by a lever operated by a handle and adapted to be locked in two positions by notches in a fixed rack; the second row i of stitching is then made.