Cutting – Tool engages work during dwell of intermittent workfeed – Plural tools at same station – one positioned for continuous...
Patent
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.
Fisher Harry
Fisher Stuart
Hoopes Dallett
Schran Donald R.
Scovill Manufacturing Company
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