Method of molding preform having 600% by weight water

Details Method of molding preform having 600% by weight water Method of molding preform having 600% by weight water

1975-05-19

1977-03-29

Bashore, S. Leon

Paper making and fiber liberation

Processes and products

Article forming processes

162227, 162231, D21J 312

Patent

active

040147371

ABSTRACT:
A molded cellulosic article, such as a loudspeaker cone, is formed without an intermediate drying step by first forming a pre-form having 600 - 900% water on a water pervious wire net, inserting the pre-form directly into a hot press, and drying the pre-form to less than about 5% by weight water in the hot press at a pressure less than about 400 psi and at a temperature of 400.degree. - 450.degree. F.

REFERENCES:
patent: 1984019 (1934-12-01), Hawley
patent: 2006831 (1935-07-01), Hawley
patent: 2116198 (1938-05-01), Hawley
patent: 2471932 (1949-05-01), Chaplin
patent: 2510595 (1950-06-01), McEwen et al.
patent: 3813284 (1974-05-01), Miki et al.

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