The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 08, 1981
Filed:
Apr. 24, 1980
Applicant:
Inventors:
James N Christini, Towanda, PA (US);
Tai K Kim, Towanda, PA (US);
Robert P McClintic, Monroeton, PA (US);
Assignee:
GTE Products Corporation, Stamford, CT (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F27B / ; F27D / ;
U.S. Cl.
CPC ...
432112 ; 34135 ; 414149 ; 414197 ; 432117 ; 432118 ; 432239 ;
Abstract
A calciner includes a rotatable cylindrical retort which is indirectly heated and has material receiving and material discharging ends. A reverse pitch tapered spiral is affixed internal of the material discharging end with the spiral tapering toward the material discharging end whereby uniformity of material discharge over 300 degrees of rotation is achieved and whereby uniformity of agitation and increased residence time are achieved.