Method of forming end stops molded on a slide fastener chain...

Details Method of forming end stops molded on a slide fastener chain... Method of forming end stops molded on a slide fastener chain...

A - Human Necessities

44

B

A44B 19/60 (2006.01)

Patent

CA 2133524

A method of forming end stops to a continuous slide fastener chain including element-free space portions at long- itudinally spaced intervals, wherein as the chain is fed in the backward direction, a pair of rows of interengaged coupling elements extending on the downstream side of an element-free space portion is spread open by a chain splitting apparatus for subsequent molding of a separable end stop whereas a pair of rows of coupling elements on the upstream side of the ele- ment-free space portion is kept in engaged condition. After the separable end stop is molded, the chain is fed in the for- ward direction during which time a sprue portion and gate portions formed integrally with the separable end stop are caught by a chain splitting member of the chain splitting apparatus. The chain splitting member is then lowered to automatically remove the sprue portion and gate portions from the separable end stop.

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