Method for heat forming hardboard and other types of forming boa

Details Method for heat forming hardboard and other types of forming boa Method for heat forming hardboard and other types of forming boa

1980-06-30

1982-04-20

Lowe, James B.

Plastic and nonmetallic article shaping or treating: processes

Removal of liquid component or carrier through porous mold...

264119, 264219, 264220, 264320, 425 84, 425812, 249113, B29C 102, B29C 1700

Patent

active

043258999

ABSTRACT:
A method and apparatus for heat forming hardboard and other types of forming board including the steps of placing a mesh screen in a die between upper and lower platens having mating contours, placing a sheet of heat formable board in the die upon the screen and below the upper platen, pressing the platens together and heating the sheet such that the sheet and screen are formed to the mating contours and gases and vapors released from the sheet follow the contours of the screen to escape from the die, separating the platens, and removing the sheet from the die.

REFERENCES:
patent: 191551 (1877-06-01), Scrymgeour
patent: 399064 (1889-03-01), McLean
patent: 1163198 (1915-12-01), Atterbury

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