Electric heating – Heating devices – With heating unit structure
Patent
1996-06-28
1999-12-21
Walberg, Teresa
Electric heating
Heating devices
With heating unit structure
219528, 219549, B65D 124
Patent
active
060052325
ABSTRACT:
An electrical heating cable in which at least two elongate conductors are separated by an insulating spacer and are contacted by at least one elongate resistive heating strip. The heating strip, which contacts alternately the first conductor and the second conductor at contact points which are longitudinally spaced apart along the length of the strip and along the length of each of the conductors, is made from a conductive polymer composition which exhibits PTC behavior. The conductors are concentric stranded wires having a lay length L of at most 20 mm or a lay angle .beta. of at least 11.degree., or a lay length L of at most 20 mm and a lay angle .beta. of at least 10.degree..
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Janvrin Aron K.
Osterhout Glen W.
Burkard Herbert G.
Gerstner Marguerite E.
Raychem Corporation
Van Quang
Walberg Teresa
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