System in an industrial polyexpansion process

Details System in an industrial polyexpansion process System in an industrial polyexpansion process

1976-01-02

1978-06-27

Spicer, Jr., Robert L.

Plastic article or earthenware shaping or treating: apparatus

With interposed non-adhering web or sheet type parting means

425224, 425290, 425329, 425817C, B29D 2704

Patent

active

040972100

ABSTRACT:
An apparatus forms substantially rectangular cross sections of foamed material by depositing the foaming mixture in a trough lined with flexible material, moving the flexible material along at a predetermined rate, placing a continuous sheet of porous flexible separating material atop the foam and allowing a plurality of articulated members to rest upon the expanding surface. The articulated members are rigid transverse to the surface of the foamable fluid but are freely movable in horizontal and vertical directions. The articulated members have substantially flat bottoms and, as the expanding foam is drawn under them, the weight and shape cause the foam to assume a rectangular cross section. Once expansion is completed, the separating material is perforated to increase the escape of gas and allow a smooth flat top surface to result.

REFERENCES:
patent: 3240846 (1966-03-01), Voelker
patent: 3471906 (1969-10-01), Henry
patent: 3546742 (1970-12-01), Kugler
patent: 3553300 (1971-01-01), Buff
patent: 3744404 (1973-07-01), Eisendrath et al.
patent: 3775522 (1973-11-01), Auge
patent: 3812227 (1974-05-01), Blackwell et al.
patent: 3817671 (1974-06-01), Lemelson
patent: 3841811 (1974-10-01), Pielle
patent: 3942925 (1976-03-01), Schmitzer et al.

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