Metal working – Method of mechanical manufacture – Of a slide fastener
Patent
1988-04-22
1989-06-20
Echols, P. W.
Metal working
Method of mechanical manufacture
Of a slide fastener
29767, B21D 5350
Patent
active
048399566
ABSTRACT:
In attaching a pair of horizontal U-shaped top stops of synthetic resin to a continuous slide fastener chain, opposed tape edges near a leading one of successive element-free spaces are spread apart, and the top stops are clamped each on its upper and lower surfaces and are placed between the opposed tape edges so as to be horizontally aligned with the opposed inner tape edges. Then the spread inner tape edges are released to restore their original form so as to be inserted through the respective top stops, whereupon only the upper surface of each of the clamped top stops is released from the clamping. Finally the top stops are fused to the opposed tape edges by applying ultrasonic heat energy to the top stops from the released upper surface thereof by an ultrasonic horn.
REFERENCES:
patent: 2523388 (1950-09-01), Natzke et al.
patent: 2619148 (1952-11-01), Camp
patent: 2701877 (1955-02-01), Morin
patent: 3504418 (1970-04-01), Perlman
patent: 3588991 (1971-06-01), Maisenbacher
patent: 3689980 (1972-09-01), Oyama
patent: 4223425 (1980-09-01), Akashi
patent: 4368570 (1983-01-01), Morita
patent: 4624809 (1986-11-01), Iimura
Echols P. W.
Yoshida Kogyo K. K.
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