Adhesive bonding and miscellaneous chemical manufacture – Methods – Plaster board making
Reexamination Certificate
2003-10-15
2010-10-26
Maki, Steven D (Department: 1791)
Adhesive bonding and miscellaneous chemical manufacture
Methods
Plaster board making
C106S672000, C106S678000, C106S680000, C106S682000
Reexamination Certificate
active
07819993
ABSTRACT:
Provided is a method of manufacturing a weight-saved foamed gypsum board having a gypsum core with high strength and excellent adhesion properties of the gypsum core with base papers for gypsum board, which method is capable of adjusting the sizes of pores in a gypsum core of a weight-saved gypsum board product into a desired range in a short time and at a low cost, even if the kinds and the compounding ratios of gypsum raw materials vary. The method of manufacturing a weight-saved gypsum board in which pores with a predetermined size are distributed in a gypsum core, includes the steps of blowing air into a foaming agent to produce foams, mixing the foams into a kneaded material that contains calcined gypsum and water to obtain foamed gypsum slurry, pouring the foamed gypsum slurry into a space between upper and lower base papers for gypsum board, shaping the base papers and the foamed gypsum slurry into a board shape, roughly cutting off and subsequently drying the board-shaped one, and cutting off the dried and shaped one into a product dimension, wherein the method further comprises the step of preliminarily adding a pore size adjusting agent for adjusting sizes of foams distributed in the foamed gypsum slurry to one of a stock solution of the foaming agent and a mixture of a stock solution of the foaming agent and water to obtain the foaming agent for producing foams with desired sizes.
REFERENCES:
patent: 4156615 (1979-05-01), Cukier
patent: 4618370 (1986-10-01), Green et al.
patent: 4804688 (1989-02-01), Vassileff
patent: 5085929 (1992-02-01), Bruce et al.
patent: 5158612 (1992-10-01), Savoly et al.
patent: 5240639 (1993-08-01), Diez et al.
patent: 5643510 (1997-07-01), Sucech
patent: 5714001 (1998-02-01), Savoly et al.
patent: 2006/0278128 (2006-12-01), Liu et al.
patent: 2032413 (1980-05-01), None
patent: 54-1324 (1979-01-01), None
patent: 01-290573 (1989-11-01), None
patent: 06-024869 (1994-02-01), None
patent: 06-048862 (1994-02-01), None
patent: 07-069700 (1995-03-01), None
patent: 10-330174 (1998-12-01), None
patent: 3028123 (2000-02-01), None
patent: 1252321 (1986-08-01), None
patent: 1252322 (1986-08-01), None
Translation for Japan 10-330174 (Dec. 2009).
Taiwanese Office Action including English Translation (Nov. 2, 2009).
Nakamura Yoshitsugu
Seki Masanobu
Ladas & Parry LLP
Maki Steven D
Yoshino Gypsum Co. Ltd.
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