Agitating – Mortar mixer type – Methods
Reexamination Certificate
2006-08-17
2008-10-14
Soohoo, Tony G (Department: 1797)
Agitating
Mortar mixer type
Methods
C366S102000, C366S276000, C366S332000
Reexamination Certificate
active
07434980
ABSTRACT:
An agitation mechanism for a gypsum processing apparatus which includes a housing having a bottom wall and at least one side wall. The housing can be constructed and arranged to receive and process gypsum-based products. An agitator frame having a similarly shaped cross-section to the cross-section of the housing is provided and positioned adjacent the bottom wall of the housing. The agitator frame is pivotally connected internally to the housing for reciprocating movement between first and second positions. The agitation mechanism is operable for preventing fluid channeling to ensure good fluidization of the gypsum products from collecting adjacent the bottom wall of the housing.
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Page from Babcock-BSH catalog showing rotary drum calciners with coolers. Germany. Such rotary calciners were first used in 1925.
Page from Krupp Polysius catalog showing POLCAL calcining system. Netherlands. One such calcining system was in use starting in 1993.
British Gypsum Limited, “High Efficiency Calcining of Gypsum”, 1998, pp. 1-8.
Declaration of Michael L. Bolind Re Information Disclosure Statement, dated Apr. 29, 2008 (5 pages including Exhibit A).
Bolind Michael L.
Porter Michael J.
Marshall & Gerstein & Borun LLP
Soohoo Tony G
United States Gypsum Company
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