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US 4,232,438 AGranted
Method and apparatus for providing space sections in a continuous slide fastener chain
AssigneeYoshida Kogyo K.K.
InventorsKihei Takahashi, Toyoo Morita
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AssigneeYoshida Kogyo K.K.
InventorsKihei Takahashi, Toyoo Morita
Estimating the term…
A method and apparatus proposed for removing interlocking elements over a certain longitudinal area from a continuous slide fastener chain of the plastic filament coil type, and providing interlocking element-free space sections in the fastener chain, according to which the fastener chain is put on a die having a square recess in its surface, a punch having a cutter blade on its lower end is moved down to and press the fastener chain into the recess, whereby the filament coils are made to bend in the V-shape in the recess, the punch is further lowered to cut off the leg portions of the coils, allowing the head portions to remain exposed and raised above the surface of the fastener chain. The raised head portions can then easily and efficiently be removed by a picking-up means, such as a scraper.
A method for providing a space section in a slide fastener chain of the coiled plastic filament type in which the chain is stitched to a fastener tape with head portions at the edge of the tape and leg portions remote from the edge of the tape, which method comprises the steps of:
An apparatus for providing a space section in an assembled slide fastener chain of the type having a pair of interlocked continuously coiled plastic filaments stitched to respective fastener tapes along the edges thereof each chain having head portions at the edge of its respective tape for interlocking with the other chain and leg portions remote from the edge of the tape comprising:
Dependencies are inferred from the claim text.