Apparatus for forming embossed acoustical tile

Details Apparatus for forming embossed acoustical tile Apparatus for forming embossed acoustical tile

1984-06-27

1985-07-23

Flint, Jr., J. Howard

Plastic article or earthenware shaping or treating: apparatus

Press forming means, press reshaping means, or vulcanizing...

425 84, B29D 714

Patent

active

045306532

ABSTRACT:
Apparatus for making an acoustical tile having a pattern of raised portions and portions in relief on the tile surface is provided by 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. In operation the roll contacts the formable, acoustical tile fiber composition pulp with sufficient force as to disspell the pulp, vent air that may be between the roll and the pulp surface through the roll, and produce a reversed pattern of the roll upon the pulp surface, then releasing the pulp from the surface of the roll by rotation of the roll.

REFERENCES:
patent: 3021254 (1962-02-01), Helversen et al.
patent: 3313002 (1967-04-01), Wyeth
patent: 3838001 (1974-09-01), Greiner et al.
patent: 4005957 (1977-02-01), Savich
patent: 4014739 (1977-03-01), Granberg
patent: 4116594 (1978-09-01), Leanna et al.
patent: 4126088 (1978-11-01), Thieme et al.
patent: 4155693 (1979-05-01), Raley
patent: 4157237 (1979-06-01), Raley

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