Adhesive bonding and miscellaneous chemical manufacture – Methods – Making electrical conductors of indefinite length
Patent
1982-02-09
1983-09-27
Dawson, Robert A.
Adhesive bonding and miscellaneous chemical manufacture
Methods
Making electrical conductors of indefinite length
100 93P, 100 98R, 100138, 100207, 156 85, 156 86, 156269, 1563084, 156312, 156522, 1565835, 174 98, 174DIG8, 219528, 219549, 428292, 428913, H01B 1306, B32B 3108
Patent
active
044067194
ABSTRACT:
There are provided improved process and apparatus for preparing a laminated heat-shrinkable strip comprising upper and lower heat-shrinkable sheets fused together with an electric conductor wire sandwiched therebetween as means for covering and protecting joints of steel pipes of oil pipelines or cables. The process comprises the steps of: subjecting successive sections of a starting strip with the sheets unfused, while said section are stationary, to a pressing operation, each operation consisting of simultaneously prehot-pressing a first length which is slightly longer than half a predetermined length, hot-pressing a second length which is adjacent to said first length and which is the same or longer than said predetermined length, and cold-pressing a third length which is adjacent to said second length and which is slightly longer than half said predetermined length, and; shifting forward said starting strip by an amount corresponding to half said predetermined length after completion of each said pressing operation and before the start of each next pressing operation. The apparatus comprises a prehot press, a main hot press and a cold press arranged in a series for carrying out the pressing operation and a conveyor system for the intermittent shifting operation wherein a pair of looped tetrafluoroethylene fluorocarbon polymer belts of a webbed pattern between which the starting strip is sandwiched, the strip being subjected to the pressures by the presses through the belts.
REFERENCES:
patent: 3951713 (1976-04-01), Emmel
patent: 4101363 (1978-07-01), Lotto
patent: 4330351 (1982-05-01), LoMaglio
Mitsumoto Takuo
Miyamoto Mamoru
Takahashi Yuzo
Dawson Robert A.
Ube Industries Ltd.
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