Method of making a stringer element for a slide fastener

Details Method of making a stringer element for a slide fastener Method of making a stringer element for a slide fastener

1976-05-21

1977-12-13

Hoag, Willard E.

Plastic and nonmetallic article shaping or treating: processes

With severing, removing material from preform mechanically,...

Forming continuous work followed by cutting

264150, 264151, 264156, 264157, 264177R, 264209, 264210R, 264296, 425DIG34, 425814, B29C 1710, B29D 500, B29F 300

Patent

active

040629198

ABSTRACT:
A 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: 3086246 (1963-04-01), Stone

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