H - Electricity – 05 – B
Patent
H - Electricity
05
B
26/123, 309/97,
H05B 3/56 (2006.01) B29C 65/34 (2006.01) F16L 47/00 (2006.01) F16L 47/22 (2006.01) H05B 3/18 (2006.01) H05B 3/58 (2006.01)
Patent
CA 1193641
BIFILAR RESISTANCE ELEMENT, HEATING ELEMENT MADE THEREFROM, AND PROCESS FOR PREPARING HEATING ELEMENT MADE THEREFROM ABSTRACT OF THE DISCLOSURE A bifilar resistance element for use in preparing heating elements used in thermal bonding and the like, wherein two electrically conducting wires are embedded in a thermoplastic sheath which is fusible when sufficient current is passed through the bifilar resist- ance element. A heating element is prepared by joining the pair of wires in a length of the bifilar resistance element together at one end to form an electrically conductive path and then winding the length into a spiral shape. Two articles of thermoplastic material may be bonded together by placing the heating element in a recess simultaneously adjacent both articles with a pair of leads to the heating element extending external- ly from the two articles to be bonded, and applying an electrical current so that the thermoplastic sheath and a portion of the adjacent articles themselves are fused, to bond the articles together upon cooling.
422524
Gowling Lafleur Henderson Llp
Sloane (r & G) Manufacturing Company Inc.
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