Plastic and nonmetallic article shaping or treating: processes – Forming electrical articles by shaping electroconductive... – Conductive carbon containing
Patent
1982-06-17
1984-04-24
Thurlow, Jeffery R.
Plastic and nonmetallic article shaping or treating: processes
Forming electrical articles by shaping electroconductive...
Conductive carbon containing
29611, 264131, 264134, 264135, 264137, 264171, 264174, 264236, 425114, H05B 334, H05B 354
Patent
active
044447086
ABSTRACT:
A flexible heating element comprises at least two flexible electrical conductors spaced apart by a PTC material, an amorphous highly conductive rubber compatible with the PTC material and adhered to each conductor being interposed between the PTC material and each conductor whereby in use current passes from one conductor to another through the PTC material via the highly conductive rubber. The conductors are spaced sufficiently close to one another to ensure that when energized the PTC material heats substantially uniformly without exhibiting a significant temperature gradient between the conductors and that any abnormal temperature increase increases the temperature of all the PTC material between the conductors in the region of the abnormal temperature increase. The arrangement is such that in use the contact resistance between the conductors and the PTC material is reduced by the amorphous highly conductive rubber interposed therebetween. The flexible heating element is produced by extruding the amorphous highly conductive rubber to cover each flexible electrical conductor and subsequently or simultaneously extruding the PTC material to cover the amorphous highly conductive rubber.
REFERENCES:
patent: 2745944 (1956-05-01), Price
patent: 3383736 (1968-05-01), Brandt
patent: 3410984 (1968-11-01), Sandford et al.
patent: 3823217 (1974-07-01), Kampe
patent: 3858144 (1974-12-01), Bedard et al.
patent: 3861029 (1975-01-01), Smith-Johannsen et al.
patent: 3914363 (1975-10-01), Bedard et al.
patent: 4060710 (1977-11-01), Reuter et al.
patent: 4074222 (1978-02-01), Kiyokawa et al.
patent: 4177376 (1979-12-01), Horsma et al.
patent: 4200973 (1980-05-01), Farkas
patent: 4212612 (1980-07-01), Piper et al.
patent: 4246468 (1981-01-01), Horsma
patent: 4307290 (1981-12-01), Bloore et al.
"Electrical Properties of Carbon Black Filled Polyethylene", Polymer Engineering and Science, Jun. 1978, vol. 18, No. 8, pp. 649-653.
"Polyethylene/Carbon Black Switching Materials", Journal of Applied Polymer Science, vol. 22, 1163-1165, (1978), Wiley & Sons, N.Y., N.Y.
Gale George M.
James David I.
Meyer John V. B.
Dean Clifford A.
Fox Robert J.
Rose Neil M.
Sunbeam Corporation
Thurlow Jeffery R.
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