Method for forming embossed acoustical tile

Details Method for forming embossed acoustical tile Method for forming embossed acoustical tile

1981-04-24

1984-09-04

Hall, James R.

Plastic and nonmetallic article shaping or treating: processes

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

By direct application of vacuum or pneumatic pressure

264517, 264518, 264119, B28B 126

Patent

active

044696566

ABSTRACT:
A method for making acoustical tile having a pattern of raised portions and portions in relief on the tile surface is provided by contacting deformable, acoustical tile fiber composition pulp with a hollow embossing roll containing the pattern in reverse and interstices communicating from the surface of the roll into the hollow interior of the roll; pressing the roll against the deformable pulp with sufficient force as to dispel the pulp; vent air, between the roll and the pulp surface, through the roll and produce the reversed pattern of the roll upon the pulp surface; and releasing the pulp from the surface of the roll by rotation of the roll.

REFERENCES:
patent: 3150416 (1964-09-01), Such
patent: 3939240 (1976-02-01), Savich

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