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

1978-10-02

1979-10-09

Hoag, W. E.

Plastic and nonmetallic article shaping or treating: processes

Carbonizing to form article

Agglomeration or accretion

156 732, 264248, 264320, 4251742, 425814, 425DIG34, B29D 500, B29C 2708

Patent

active

041706170

ABSTRACT:
In a slide fastener having continuous coupling elements of the helicoidal-coil type, a bottom stop is formed by imparting ultrasonic vibrations to the several interengaged 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 lowermost 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.

REFERENCES:
patent: 3190779 (1965-06-01), Porepp
patent: 3263291 (1966-08-01), Taylor
patent: 3813459 (1974-05-01), Potin
patent: 3839128 (1974-10-01), Arai
patent: 3874963 (1975-04-01), Barger
patent: 4054973 (1977-10-01), Moertel et al.
patent: 4115489 (1978-09-01), MacFee

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