B - Operations – Transporting – 29 – D
Patent
B - Operations, Transporting
29
D
26/26
B29D 5/00 (2006.01) A44B 19/14 (2006.01) B21D 53/50 (2006.01) B21F 45/18 (2006.01) B29C 65/06 (2006.01) B29C 65/08 (2006.01) B29D 5/02 (2006.01)
Patent
CA 1111233
ABSTRACT OF THE DISCLOSURE A method of welding a row of interconnected thermo- plastic coupling elements for slide fasteners at opposed leg portions of each coupling element with the use of an ultra- sonic horn. The method comprises: pressing the opposed leg portions of the coupling elements against the ultrasonic horn on its opposite sides while the coupling elements are being fed at constant speed; concurrently with this pressing step, softening the opposed leg portions of the coupling elements at their confronting inner surfaces by ultrasonically vibrating the ultrasonic horn in a direction parallel to the confronting inner surfaces; and pressing the opposed leg portions of the coupling elements, after the latter is disengaged from the ultrasonic horn, against each other so as to be united at the confronting inner surfaces that have been softened. An apparatus for carrying the above method into practice efficiently and accurately is also disclosed.
330082
Akashi Shunji
Yoshida Hiroshi
Gowling Lafleur Henderson Llp
Yoshida Kogyo K.k.
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