Method for setting a workpiece correctly on a skirt-zipper sewin

Details Method for setting a workpiece correctly on a skirt-zipper sewin Method for setting a workpiece correctly on a skirt-zipper sewin

1988-12-22

1989-10-03

Hunter, H. Hampton

Sewing

Elements

Frames

11212126, 112104, D05B 9700

Patent

active

048709182

ABSTRACT:
The disclosed method and apparatus for setting a workpiece correctly on a skirt-zipper sewing machine provides a pair of pressing plates which are positioned at the center of a zipper when the plates are lowered and which press the material of the workpiece and the zipper to be sewed to it.
Each pressing plate works as a guide to set the to-be-sewn section of the workpiece at the center line of the zipper. The plates are then raised and again lowered to press the workpiece so that shrink marks that occur in bias curved sections of the workpiece are stretched. In this manner, a zipper is sewed to the workpice without shrink marks.

REFERENCES:
patent: 2410399 (1946-10-01), Wood
patent: 3919942 (1975-11-01), Galya et al.
patent: 4109591 (1978-08-01), Rakacs
patent: 4227471 (1980-10-01), Collbrunn et al.
patent: 4497270 (1985-02-01), Boser
patent: 4686335 (1987-03-01), Hiramatsu et al.
WO86/02672, 10/1984, PCT Intl-Appln.

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