Plastic and nonmetallic article shaping or treating: processes – Direct application of fluid pressure differential to... – Production of continuous or running length
Patent
1982-08-23
1984-05-01
Czaja, Donald E.
Plastic and nonmetallic article shaping or treating: processes
Direct application of fluid pressure differential to...
Production of continuous or running length
264 26, 264230, 264565, 264567, B29C 1300
Patent
active
044460953
ABSTRACT:
Long lengths of a heat-shrinkable sleeve for use in splicing electrical cables and the like are made in a continuous process. The sleeve is formed around a permeable core, and the core and sleeve are advanced together in an axial direction, the leading end of the advancing sleeve being hermetically sealed. The core and sleeve pass through a heating station, thereby heating a portion of at least the sleeve, and a fluid is introduced under pressure into the core, thereby internally pressurizing the sleeve to effect a radial expansion of the heated portion thereof. The core and sleeve then pass through a cooling station, thereby cooling the expanded sleeve to stabilize it. A stress graded compound also for use in splicing electrical cables and the like is made by heating a dimethyl silicone liquid to remove entrapped gas and mixing the liquid with a silicone carbide powder having a particle size capable of passing through a 400 mesh screen. The volumetric proportion of powder to 1 part liquid is within the range of 0.5 part to 2.0 parts.
REFERENCES:
patent: 3554999 (1971-01-01), Shaw et al.
patent: 4056596 (1977-11-01), Pahl
patent: 4071597 (1978-01-01), Karabedian
patent: 4092382 (1978-05-01), Heckman et al.
patent: 4172873 (1979-10-01), Spicer
patent: 4227293 (1980-10-01), Taylor
patent: 4304616 (1981-12-01), Richardson
Katz Carlos
Zidon Amicam C.
Cable Technology Laboratories, Inc.
Czaja Donald E.
Thompson W.
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