Plastic and nonmetallic article shaping or treating: processes – With measuring – testing – or inspecting
Patent
1984-04-05
1986-02-18
Anderson, Philip
Plastic and nonmetallic article shaping or treating: processes
With measuring, testing, or inspecting
264 451, 264 53, 264255, 425145, 425817R, B29C 6722, B29C 3912, B29C 3944
Patent
active
045713197
ABSTRACT:
The specification describes urethane foam automobile seats having variable firmness or density or varying in some other property from one portion of a seat to another by combining several hardenable precursor constituents in a predetermined ratio and discharging the resulting mixture through a single nozzle into a predetermined place in the mold and then changing the constituents and/or ratios of the constituents as the mixture discharges into other parts of the mold to produce the desired property in each part of the seat. The mixing of the various constituents is under the control of a computer programmed to deliver to each mold a series of shots of the polymer mixture, each constituent being supplied at the proper rate, and gradually and simultaneously changing the flow of each constituent at the beginning and end of each shot to maintain a consistent ratio within each shot yet allowing a change of ratios from one shot to the next.
REFERENCES:
patent: 3020587 (1962-02-01), Alderfer et al.
patent: 3064173 (1962-11-01), Breen et al.
patent: 3219046 (1965-11-01), Waugh
patent: 3231801 (1966-01-01), Lang
patent: 3257149 (1966-06-01), Fruchte et al.
patent: 3410293 (1968-11-01), Ernyei
patent: 3478767 (1969-11-01), Kister
patent: 3606903 (1971-09-01), Porter et al.
patent: 3707747 (1972-11-01), Porter et al.
patent: 3801684 (1974-04-01), Schrewe et al.
patent: 3888612 (1975-06-01), Schrewe et al.
patent: 3984510 (1976-10-01), Chandra et al.
patent: 4073839 (1978-02-01), Burkholder et al.
patent: 4176672 (1979-12-01), Borberg
patent: 4199303 (1980-04-01), Gusmer et al.
patent: 4312820 (1982-01-01), Arnold et al.
patent: 4317791 (1982-03-01), Ludke et al.
patent: 4328549 (1982-05-01), Avery
patent: 4379856 (1983-04-01), Samaritter et al.
patent: 4399105 (1983-08-01), Tilgner et al.
"Automobile Seats in Engineering Plastics", by Dr. Hans-Albrecht Freitag, Bayer at Sitev '81 in Geneva, Bayer AG, May 1981, 23 pages.
Baluch Donald T.
Zimmerman, Jr. Paton M.
Anderson Philip
General Motors Corporation
Hill Warren D.
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