Plastic and nonmetallic article shaping or treating: processes – Carbonizing to form article – Agglomeration or accretion
Patent
1989-04-06
1990-09-18
Thurlow, Jeffery
Plastic and nonmetallic article shaping or treating: processes
Carbonizing to form article
Agglomeration or accretion
264 68, 264130, 264230, 2642888, 2642896, 264296, 264322, 26433114, 264342R, 264127, 4251742, 623 1, 623901, B06B 300, B29C 3360, B29C 6100
Patent
active
049576690
ABSTRACT:
PTFE vascular tubing is guided on to a tapered ultrasonic horn as the horn is oscillating at a high frequency. This action causes the end of the tubing moved onto the horn to expand. The expanded tubing is then positioned on a mandrel having a desired shape, such as tapered, and resintered. The finished tubing with an expanded diameter on one end and a non-expanded diameter on the other end is then removed from the mandrel, and is ready for use. Untapered tubing can also be radially expanded by this method to provide a thinner wall.
REFERENCES:
patent: 3953566 (1976-04-01), Gore
patent: 3962153 (1976-06-01), Gore
patent: 4297306 (1981-10-01), Yoshino et al.
patent: 4321711 (1982-03-01), Mano
patent: 4647416 (1987-03-01), Seiler, Jr. et al.
Shiley Inc.
Tentoni Leo B.
Thurlow Jeffery
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