Plastic and nonmetallic article shaping or treating: processes – Direct application of fluid pressure differential to... – With internal application of fluid pressure
Patent
1994-01-03
1995-08-22
Timm, Catherine
Plastic and nonmetallic article shaping or treating: processes
Direct application of fluid pressure differential to...
With internal application of fluid pressure
294211, 29450, 427 74, 430127, B23P 1102
Patent
active
054437857
ABSTRACT:
A seamless substrate is elastically stretched over a hollow cylindrical porous mandrel having a thermal expansion coefficient not greater than the thermal expansion coefficient of the substrate by applying fluid under pressure through the mandrel and relieving the pressure of the fluid so that the substrate relapses to a shape in close contact with the mandrel. A substrate carrier includes a hollow, substantially cylindrical mandrel formed of a porous material, the mandrel having an outer diameter not greater than the inner diameter of the tubular substrate and means for supplying a pressurized fluid to the interior of the mandrel, wherein the porous material is a material having a thermal expansion coefficient not greater than the thermal expansion coefficient of the substrate.
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H. T. Mastalski, "Continuous Horizontal Coating System", Xerox Disclosure Journal, vol. 17, No. 2, Mar./Apr. 1992.
Griffiths Clifford H.
Mastalski Henry T.
Timm Catherine
Xerox Corporation
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