Method and system for generating foam for the manufacture of...

Plastic article or earthenware shaping or treating: apparatus – With mechanical means forming or expanding pores

Reexamination Certificate

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Details

C156S039000, C156S346000, C366S101000

Reexamination Certificate

active

07654807

ABSTRACT:
A method for generating foam for gypsum product manufacturing includes injecting water through a conduit and injecting a foaming agent through the conduit to form a first solution comprising the water and the foaming agent. The method includes straining the first solution in the conduit and injecting air through the conduit to form a second solution comprising the water, the foaming agent and the air. The method also includes straining the second solution in the conduit to form foam and communicating the foam to a gypsum product manufacturing device.

REFERENCES:
patent: 2864714 (1958-12-01), Dixon, Jr. et al.
patent: 4161855 (1979-07-01), Mulvey et al.
patent: 4240839 (1980-12-01), Crepeau et al.
patent: 4310996 (1982-01-01), Mulvey et al.
patent: 4455271 (1984-06-01), Johnson
patent: 4872913 (1989-10-01), Dunton et al.
patent: 5356565 (1994-10-01), Southwell
patent: 5683635 (1997-11-01), Sucech et al.
patent: 6422734 (2002-07-01), Sethuraman et al.

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