Stock material or miscellaneous articles – Structurally defined web or sheet – Including aperture
Patent
1995-06-06
1997-01-21
Watkins, William
Stock material or miscellaneous articles
Structurally defined web or sheet
Including aperture
428338, 428215, 428288, 4283111, 4283171, 4283115, 428688, 431326, 431328, F34D 1414
Patent
active
055958168
ABSTRACT:
Unusually strong and highly perforated plates are formed by pressurized filtration of a suspension of chopped ceramic fibers in an aqueous dispersion of colloidal alumina or colloidal silica through a mold having a perforated filter base and a pin support base having pins that extend through and beyond the perforations of the filter base. Pressurized filtration is preferably conducted by applying vacuum on the down stream side of the mold. When the layer of chopped fibers deposited on the perforated filter base has the desired thickness, filtration is stopped. The perforated filter base and pin support base are moved apart to retract the pins from contact with the perforated layer of chopped fibers which is transferred to a drier operating at a temperature not exceeding 650.degree. F., for conversion into a strong perforated plate.
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patent: 5447666 (1995-09-01), La Fontaine
Alzeta Corporation
Garbe Paul W.
Watkins William
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