Method of making pressed board

Details Method of making pressed board Method of making pressed board

1974-12-13

1978-04-25

Hoag, Willard E.

Plastic and nonmetallic article shaping or treating: processes

Treatment of material by vibrating, jarring, or agitating...

Continuously formed or indefinite length article

264121, 264123, 264126, 264165, 264257, B29D 714, B29G 700, B29J 500

Patent

active

040863131

ABSTRACT:
In manufacturing pressed boards, a flowable mixture of thermosetting resinous material and filler is blown through one or more nozzles into a converging throat formed by a pair of relatively inclined perforated conveyor bands in which the mixture is compacted into a continuous, coherent but preferably still pliable web by the application of heat to preset the resinous material thereof. The web may be immediately converted into a rigid board by being led, without intermediate cooling, into a continuously working press for final condensation of the resin; on the way to that press it may be subjected to a finishing operation, as by adhesion of preheated strips of paper or other coverings to its still tacky surfaces.

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patent: 3177275 (1965-04-01), Brenner
patent: 3356280 (1967-12-01), Cole
patent: 3518157 (1970-06-01), Terry et al.
patent: 3863908 (1975-02-01), Carpentier

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