Paper making and fiber liberation – Apparatus – Running or indefinite length product forming and/or treating...
Patent
1989-03-06
1990-07-17
Housel, James C.
Paper making and fiber liberation
Apparatus
Running or indefinite length product forming and/or treating...
162314, 162210, 162223, 4253261, 425 831, 4253871, 425385, 264119, 264504, D21F 904
Patent
active
049419498
ABSTRACT:
An apparatus for texturing the surface of wet cast plastic acoustical composition during manufacture of acoustical tiles by use of spinning air rolls. In the apparatus, at least one hollow cylindrical roll that is perforated in a random manner is suspended over the surface of wet cast plastic acoustical composition, the roll being driven by a motor. The interior of the roll is preferably provided with a perforated air tube or pipeline, from which issues uniform air pressurization of the spinning roll vessel. By providing differential speed of the roll in contrast to the line speed of the wet plastic composition and different air pressurization of the roll, a wide variety of textures may be produced on the surface of the wet plastic acoustical composition.
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Didrick Robert M.
Durkin II Jeremiah F.
Housel James C.
Lorenzen John M.
Robinson Robert H.
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