Semi-automatic apparatus for attaching flypieces to a slide fast

Details Semi-automatic apparatus for attaching flypieces to a slide fast Semi-automatic apparatus for attaching flypieces to a slide fast

1986-01-24

1987-01-27

Goldberg, Howard N.

Metal working

Means to assemble or disassemble

Slide fastener

29 332, B21D 5350, A41H 3706

Patent

active

046385576

ABSTRACT:
Fabric flypieces are placed randomly on a top plate of a unified flypiece feed apparatus which orients the flypieces and feeds them in succession to a sewing station at which they are united with a zipper chain either in end-to-end abutment or with a slight predetermined gap between the flypieces. A somewhat angled flypiece belt conveyor and a cooperative variable tension drag device above the conveyor orients the flypieces longitudinally and feeds them to the sewing station at a substantially greater speed than the united flypieces and zipper chain leave the sewing station. A photo-optical device senses the presence or absence of flypieces on the top plate and stops the sewing machine if the operator fails to load a flypiece within a predetermined time interval.

REFERENCES:
patent: 2823388 (1958-02-01), Prupis
patent: 3570104 (1971-03-01), Jensen
patent: 4598454 (1986-07-01), Yunoki
patent: 4606100 (1986-08-01), Yunoki
patent: 4608745 (1986-09-01), Miyakawa

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