Title:
METHOD OF REDUCING THE WALL THICKNESS OF A PTFE TUBE AND PRODUCT FORMED THEREBY
Document Type and Number:
WIPO Patent Application WO2002051622
Kind Code:
A3
Abstract:
A thin wall PTFE tube is formed from an extruded green tube (10). The PTFE tube includes an inner tubular surface and an opposed outer tubular surface defining a tubular wall of a first thickness. The tubular wall is compressed to uniformly reduce the wall-thickness and circumferentially orient the tube. The PTFE tube is positioned over a first elongate roller (22) with the inner tubular surface being in contact therewith. A second roller (24) is positioned against the outer tubular surface of the PTFE tube. The pair of rollers are counter rotated so as to circumferentially compress the tubular (12) wall between the rollers (22, 24). This results in the uniform reduction in the tubular wall (12) from the first thickness to a lesser second thickness and a circumferential orientation otherwise not occuring in an extruded PTFE paste extrusion.
Inventors:
HILL JASON P
LININGER JAMES R
BROWN BRIAN J
LININGER JAMES R
BROWN BRIAN J
Application Number:
PCT/US2001/048107
Publication Date:
April 03, 2003
Filing Date:
December 11, 2001
Export Citation:
Assignee:
SCIMED LIFE SYSTEMS INC (US)
International Classes:
A61M25/00; B29C43/22; B29C48/32; B29C55/18; B29C55/24; B29C67/00; B29D23/00; B29K27/18; B29L23/00; (IPC1-7): B29C55/24; B29C67/00
Foreign References:
| DE4336175C1 | 1994-10-06 | |||
| US3225129A | 1965-12-21 | |||
| US5843173A | 1998-12-01 | |||
| DE2536358A1 | 1976-02-26 | |||
| GB1148243A | 1969-04-10 | |||
| US4613474A | 1986-09-23 | |||
| US4060577A | 1977-11-29 | |||
| US2994933A | 1961-08-08 | |||
| US5207960A | 1993-05-04 | |||
| US4225547A | 1980-09-30 |
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