Adhesive bonding and miscellaneous chemical manufacture – Methods – Surface bonding and/or assembly therefor
Reexamination Certificate
1996-11-18
2001-05-01
Silbaugh, Jan H. (Department: 1732)
Adhesive bonding and miscellaneous chemical manufacture
Methods
Surface bonding and/or assembly therefor
C156S196000, C156S209000, C249S114100, C264S333000
Reexamination Certificate
active
06224698
ABSTRACT:
FIELD OF THE INVENTION
The present invention relates to a mold and a method of manufacturing an inorganic board by employing said mold. Said inorganic board is used as a building material.
DESCRIPTION OF THE PRIOR ART
At present, the semi-dry method is provided to manufacture the inorganic board. Said method comprises strewing a cement-reinforcing wood material mixture onto a mold to form a mat, pressing said mat to pre-harden said mat, and incubating said pre-hardened mat. Generally, said mold has an embossed surface to give a corresponding embossed design to the surface of the resulting inorganic board.
Hitherto, a mold made of a fiber reinforced plastic has been provided for said semi-dry method. Nevertheless, because of the remarkable difference in the coefficient of thermal expansion between the inorganic board and said mold, slippage of the interface between the inorganic board and said mold is caused and said slippage causes the embossed design of said inorganic board to become warped.
SUMMARY OF THE INVENTION
Accordingly, an object of the present invention is to provide a mold having a coefficient of thermal expansion substantially equal to an inorganic board manufactured on said mold.
Another object of the present invention is to provide an inorganic board having a clear embossed design, without being warped, manufactured by employing said mold.
Said object may be attained to provide a mold comprising a mold part made of a fiber reinforced plastic and a metal part attached to the back of said mold part, and a method of manufacturing an inorganic board comprising strewing a cement-reinforcing wood material mixture onto said mold to form a mat, pressing said mat to pre-harden said mat, and incubating said pre-hardened mat.
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CRC Handbook of Chemistry and Physics, 59thedition, 1978-1979 CRC Press, Inc., p. D-225.*
Webster's II New Riverside Univ. Dictionary, p 1147, ©1984.
Cooper & Dunham LLP
Dowden Donald S.
Nichiha Corporation
Poe Michael I.
Silbaugh Jan H.
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