Method and apparatus for positioning and holding a thread chain

Details Method and apparatus for positioning and holding a thread chain Method and apparatus for positioning and holding a thread chain

1988-02-22

1989-05-16

Reynolds, Wm. Carter

Sewing

Elements

Thread cutting, severing or breaking

112301, 112DIG1, 1122691, D05B 6500

Patent

active

048299200

ABSTRACT:
Apparatus and method of positioning and holding a thread chain for sewing onto successively fed workpieces, a thread chain which had been sewn beyond the rear edge of a workpiece and had been cut off flush with the rear edge of the workpiece, is sucked into the suction aperture of a suction tube. The suction tube is movable in a path parallel to the stitch plate of the sewing machine first in a catch position behind the needle and then the tube is moved into a delivery position before the needle aligned with a seam line (N). The chain is clamped there under a tensile stress in such a way that complete inclusion of the thread chain into the next following seam is possible. The suction tube extends parallel to the stitch plate and has a suction aperture into which the severed thread chain is sucked. The tube is moved to a delivery position in which the thread chain is pressed against an elastic abutment. The suction aperture of the suction tube and the abutment form a clamp for the thread chain and the thread chain is pulled out of the clamp with a continued feed of the workpiece.

REFERENCES:
patent: 3159124 (1964-12-01), Rubin
patent: 3356054 (1967-12-01), Southwell et al.
patent: 3698336 (1972-10-01), Launer
patent: 4644884 (1987-02-01), Tatsumi

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