Method of forming a bottom stop on a slide fastener

Details Method of forming a bottom stop on a slide fastener Method of forming a bottom stop on a slide fastener

B - Operations, Transporting

29

D

26/169

B29D 5/00 (2006.01) A44B 19/36 (2006.01) A44B 19/60 (2006.01) B29C 65/08 (2006.01)

Patent

CA 1100742

ABSTRACT OF THE DISCLOSURE In a slide fastener having continuous coupling ele- ments of the helicoidal-coil type, a bottom stop is formed by imparting ultrasonic vibrations to the several inter- engaged lowermost scoops of the coupling elements, while these scoops are being compressed from opposite lateral sides thereof to move the coupling heads of each element into abutment against a core received in the other element. The ultrasonic vibrations are applied by the horn of an ultrasonic welding assembly holding the interengaged lower- most scoops from both front and rear sides of the fastener. The invention is also applicable to a slide fastener having zigzag-type continuous coupling elements.

313588

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