Plastic and nonmetallic article shaping or treating: processes – Repairing or restoring consumer used articles for reuse
Patent
1991-12-17
1993-06-08
Aftergut, Karen
Plastic and nonmetallic article shaping or treating: processes
Repairing or restoring consumer used articles for reuse
2940218, 156 94, 210232, 2103232, 210485, 210504, 210508, 2105101, 264 35, B23D 600, B32B 3500
Patent
active
052176592
ABSTRACT:
A repair method for filter elements such as those used to filter polyester during the later stages of polyester manufacture in which the filter media is a particulate solid media arranged in a desired shape and maintained in that shape by a surrounding porous container that has filtration openings of a desired size. The method fills undesirably large openings in the surrounding porous container that result from damage to the container and through which enlarged openings the particulate solid media would otherwise escape with a polymeric resin. The polymeric resin is a resin with a glass transition temperature when cured that is at least greater than the melting point of polyester, and that has an absence of any chemical functional groups at temperatures at least as great as the melting point of polyester that would substantially react with polyester, the glycol precursors of polyester, the acid precursors of polyester, or the solvents useful in cleaning polyester from such filter elements.
REFERENCES:
patent: 2792441 (1957-05-01), Platow
patent: 3061917 (1962-11-01), Pall
patent: 3499062 (1970-03-01), Geary, Jr. et al.
patent: 3729279 (1973-04-01), Mott
patent: 3968192 (1976-07-01), Hoffman, III et al.
patent: 4126560 (1978-11-01), Marcus et al.
patent: 4138303 (1979-02-01), Taylor, Sr.
patent: 4169059 (1979-09-01), Storms
patent: 4170695 (1979-10-01), Brown et al.
patent: 4226921 (1980-10-01), Tsang
patent: 4248648 (1981-02-01), Kopp
patent: 4260350 (1981-04-01), Russell, Jr.
patent: 4323453 (1982-04-01), Zampini
patent: 4323454 (1982-04-01), Fritsche et al.
patent: 4361489 (1982-11-01), Kilsdonk et al.
patent: 4562022 (1985-12-01), Li et al.
patent: 4597727 (1986-07-01), Birkhauser, III
patent: 4689191 (1987-08-01), Beck et al.
Ciba-Geigy Corp. 1985, Plastice Department, Product Data; Attachment 2; "Matrimid.TM. 5292 System".
Edwards John V.
Nichols Carl S.
Aftergut Karen
Wellman, Inc.
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