Apparatus for gapping zipper chain

Details Apparatus for gapping zipper chain Apparatus for gapping zipper chain

1978-11-15

1980-06-10

Schran, Donald R.

Cutting

Tool engages work during dwell of intermittent workfeed

Plural tools at same station, one positioned for continuous...

83302, 83921, 83431, 83436, 29770, 29408, B29D 500

Patent

active

042066697

ABSTRACT:
Apparatus for producing gaps in zipper chain is especially adapted for chain having plastic elements of U-shape joined by imbedded connector threads and stitched to tape. Apparatus includes slitting means which slice into and demolish fastener elements in the gap as the zipper is drawn along, and lancer elements which are periodically activated to cut the connecting threads at the beginning and end of the gap. Stitches and tape in gap are left intact.

REFERENCES:
patent: 1762330 (1930-06-01), Fiedler et al.
patent: 2752997 (1956-07-01), Soave
patent: 3611545 (1971-10-01), Takamatsu
patent: 3831474 (1974-08-01), Perlman
patent: 3844017 (1974-10-01), Fisher et al.
patent: 3848500 (1974-11-01), Takahashi
patent: 3913432 (1975-10-01), Thaler et al.

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