Method of making a stringer for a slide fastener

Abstract

Abstract A method of making a stringer blank for a slide fastener having an extruded elongated body provided with transversely spaces slider guide members projecting outwardly from one side thereof adjacent to the longitudinal edge portions of the body, and abutment members projecting outwardly from the opposite side thereof. Forming a plurality of longitudinally spaced slots in the stringer blank to provide a series of transverse, substantially parallel ladder-like portions, wherein each of these portions includes a centrally enlarged elements to define an interlocking head number. Preferably, the slots are alternately cut through the opposing longitudinal edges of the blank. folding the stringer bland in half with one guide member overlying the other guide member, and with the abutment members contacting each other to define a stringer provided with a series of projection elements having the interlocking head member at the free end thereof and an open receiving slot at the opposite end thereof. The receiving slot is adapted to house the tape or fabric to which the stringer is attached by conventional stitching. The abutment members position the fabric relative to the interlocking head member to provide a uniform spacing therebetween. The receiving slot may be provided with an enlarged recess to receive an elongated bead formed on the edge of the fabric.

Inventors

• 👤 F Rojahn

Bibliographic Details