Method of forming space portions in slide fastener chain

Details Method of forming space portions in slide fastener chain Method of forming space portions in slide fastener chain

A - Human Necessities

44

B

A44B 19/42 (2006.01) A44B 19/58 (2006.01)

Patent

CA 2103945

A method of forming successive space portion in a slide fastener chain, comprising: positioning the chain in such a manner that an element contiguous to the backward end of a prospective space portion is brought into engagement with a positioning pin up- stream of a cutting unit; positioning the chain in such a manner that an element contiguous to the for- ward end of the prospective space portion is out of engagement with another positioning pin downstream of the cutting unit, and then positioning the chain, as the feed roller is rotated forwardly to extend the chain so that the positioning pin is inserted between the ele- ments, whereupon the downstream positioning pin is brought into engagement with the element adjacent to the prospec- tive space portion as the feed roller is rotated backwardly to restore the slide fastener chain; and cutting off ele- ments of the prospective space portion and removing the cut elements from the prospective space portion.

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