Title:
MANUFACTURING PROCESS AND APPARATUS FOR MAKING A HELICAL RIB TUBE
Document Type and Number:
WIPO Patent Application WO2003013826
Kind Code:
B1
Abstract:
A method of making a composite tubular article made up of at least two concentric members, the outer of said members being tubular and the inner of said members being at least cylindrical and preferably tubular, and struts disposed in supporting and positioning orientation between the inner and outer members, by extruding a moldable material into the desired profile; stretching the inner tubular member over a cooling mandrel and disposing a cooling sleeve over the outer tubular member under conditions sufficient to solidify the article; twisting and longitudinally pulling the solidified article, so that it rotates over the cooling mandrel and inside the cooling sleeve while it is moving down stream across the cooling mandrel, whereby causing the extrudate to be twisted into a helical shape.
Inventors:
HERRINGTON F JOHN (US)
Application Number:
PCT/US2002/024437
Publication Date:
July 03, 2003
Filing Date:
August 01, 2002
Export Citation:
Assignee:
PROTEUS INC (US)
HERRINGTON F JOHN (US)
HERRINGTON F JOHN (US)
International Classes:
B23D21/04; B26D1/60; B26D3/06; B26D3/16; B26D9/00; B29C48/32; B29C48/355; F16L9/19; B29C53/14; (IPC1-7): B29C47/20; F16L9/19
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