Electric heating – Heating devices – With heating unit structure
Patent
1981-09-28
1984-01-24
Dixon, Jr., William R.
Electric heating
Heating devices
With heating unit structure
219504, 219505, 219549, 338 22R, 338 22SD, 428141, 428149, 428421, 428409, 524494, 524545, 524546, H05B 310, H01C 710, B32B 2700
Patent
active
044278772
ABSTRACT:
Polymers having low surface energy, e.g. fluorocarbon polymers, are rendered printable by conventional methods, e.g. offset printing, by incorporating a suitable particulate filler in the polymer, and shaping the filled polymer under conditions which result in the surface of the shaped polymer having irregularities which correspond to the particles of the filler. Suitable fillers comprise particles having at least two dimensions in the range of 1 to 40 microns; glass fibers are particularly satisfactory. Extruded insulating polymeric jackets for electrical components, e.g. strip heaters and wire and cable, can readily be marked by use of the invention.
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Dixon Jr. William R.
Raychem Corporation
Richardson Timothy H. P.
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