Plastic article or earthenware shaping or treating: apparatus – Press forming means – press reshaping means – or vulcanizing...
Reexamination Certificate
2005-09-06
2005-09-06
Mackey, James P. (Department: 1722)
Plastic article or earthenware shaping or treating: apparatus
Press forming means, press reshaping means, or vulcanizing...
C425S367000, C425S393000
Reexamination Certificate
active
06939119
ABSTRACT:
A thin wall PTFE tube is formed from an extruded green tube. 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 with the inner tubular surface being in contact therewith. A second roller 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 wall between the rollers. This results in the uniform reduction in the tubular wall from the first thickness to a lesser second thickness and a circumferential orientation otherwise not occurring in an extruded PTFE paste extrusion.
REFERENCES:
patent: 2994933 (1961-08-01), Wolfe
patent: 3225129 (1965-12-01), Taylor et al.
patent: 4060577 (1977-11-01), Collins
patent: 4225547 (1980-09-01), Okita
patent: 4530811 (1985-07-01), Jakobsen et al.
patent: 4613474 (1986-09-01), Donati
patent: 4919870 (1990-04-01), Ibar
patent: 5207960 (1993-05-01), Moret de Rocheprise
patent: 5346502 (1994-09-01), Estabrook et al.
patent: 5466509 (1995-11-01), Kowligi et al.
patent: 5843173 (1998-12-01), Shannon et al.
patent: 6048484 (2000-04-01), House et al.
patent: 6187054 (2001-02-01), Colone et al.
patent: 6203735 (2001-03-01), Edwin et al.
patent: 6364649 (2002-04-01), Moore
patent: 6605119 (2003-08-01), Colone et al.
patent: 25 36 358 (1976-02-01), None
patent: 43 36 175 (1994-10-01), None
patent: 1148243 (1969-04-01), None
Brown Brian J.
Hill Jason P.
Lininger James R.
Hoffmann & Baron , LLP
Mackey James P.
Sci-Med Life Systems, Inc.
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