APPARATUS AND METHOD FOR PRODUCING A TUBE OF VARYING CROSS-SECTION

Title:

APPARATUS AND METHOD FOR PRODUCING A TUBE OF VARYING CROSS-SECTION

Document Type and Number:

WIPO Patent Application WO2004062894

Kind Code:

A3

Abstract:

An apparatus for producing a tube having a round cross-section over a major portion of its length and intermediate its ends having a flattened oval cross-section. The apparatus includes an extrusion head (14) with an extrusion die (24) through which the tube is extruded. A pinching device, which includes opposed pinching elements (2), is arranged at the extrusion head (14) so as to be selectively moveable together to press on and pinch the tube to produce the oval cross-section of the tube. The rollers (2) are selectively moveable apart to not pinch the tube to enable the tube to be extruded round, whereby a round tube with an intermediate flattened oval shaped portion is produced.

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Inventors:

WALKER J RAE (US)
PAUL DAVID S (US)

Application Number:

PCT/US2004/000405

Publication Date:

January 06, 2005

Filing Date:

January 08, 2004

Export Citation:

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Assignee:

AXIOM MEDICAL INC (US)
WALKER J RAE (US)
PAUL DAVID S (US)

International Classes:

A61M25/00; B29C48/09; B29C48/32; B29C48/90; B29C69/02; B29D1/00; B29D23/00; B29C35/02; B29D; (IPC1-7): B29C47/52

Foreign References:

US6565343B1	2003-05-20
US3905749A	1975-09-16
JPH02251314A	1990-10-09
US6450752B1	2002-09-17
US6325953B1	2001-12-04
US3891374A	1975-06-24

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