Plastic and nonmetallic article shaping or treating: processes – Vacuum treatment of work
Patent
1983-10-26
1985-11-19
Anderson, Philip
Plastic and nonmetallic article shaping or treating: processes
Vacuum treatment of work
264280, 264321, 264DIG66, B29D 2700
Patent
active
RE0320323
ABSTRACT:
A method of densifying open-celled polyurethane foam is provided in which heated air at a temperature between about 425.degree. F. and 460.degree. F. is circulated through a mass of the foam so as to rapidly and uniformly raise the temperature of the mass to between about 365.degree. F. and 435.degree. F., the mass is then compressed to a desired thickness while its temperature is maintained between 365.degree. F. and 435.degree. F., and the mass is then immediately permitted to cool.
REFERENCES:
patent: 2933767 (1960-04-01), Vieli et al.
patent: 3050432 (1962-08-01), Weinbrenner et al.
patent: 3060137 (1962-10-01), Gemeinhardt et al.
patent: 3061885 (1962-11-01), Rogers et al.
patent: 3112524 (1963-12-01), Legler
patent: 3325338 (1967-01-01), Geen
patent: 3400196 (1968-09-01), Le Roy
patent: 3443007 (1969-05-01), Hardy
patent: 3475525 (1969-10-01), Peters
patent: 3506600 (1970-04-01), Zocco et al.
patent: 3577519 (1971-05-01), Gambardella
patent: 4073979 (1978-02-01), Pettingell
patent: 4228076 (1980-10-01), Pettingell
patent: 4250137 (1981-02-01), Riedler
patent: 4260575 (1981-04-01), Thew et al.
Anderson Philip
Foam Cutting Engineers, Inc.
LandOfFree
Method of densifying open-celled polyurethane material does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method of densifying open-celled polyurethane material, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method of densifying open-celled polyurethane material will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-76794