Slide fastener stringer

Details Slide fastener stringer Slide fastener stringer

1976-02-09

1977-07-26

Gelak, Bernard A.

Buckles, buttons, clasps, etc.

Buckles

One-piece

2420516R, A44B 1914

Patent

active

040372952

ABSTRACT:
A stringer method for making a plastic, relatively flexible stringer for a slide fastener is disclosed. The stringer blank is extruded in a relatively rigid U-shaped form and, subsequently, a plurality of longitudinally spaced, transverse slots are die cut in the stringer blank in order to provide a series of transverse, substantially parallel ladder-like portions wherein each of the ladder-like portions includes an interlocking head member. A plurality of longitudinally spaced apart seats are also formed by a die cutting step in order to define neck portions of reduced thickness about which the stitches are placed in order to secure the fabric to the stringer.

REFERENCES:
patent: 2252305 (1941-08-01), Puschner
patent: 3086246 (1963-04-01), Stone
patent: 3732601 (1973-05-01), Rojahn
patent: 3772743 (1973-11-01), Hansen
patent: 3885273 (1975-05-01), Heimberger

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