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:
Feb. 11, 1992
Filed:
Feb. 20, 1991
Applicant:
Inventor:
Stuart T Jones, Franklin, VA (US);
Assignee:
Union Camp Patent Holding, Inc., Wayne, NJ (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
D21C / ;
U.S. Cl.
CPC ...
162244 ; 162246 ; 422209 ;
Abstract
An apparatus for bleaching pulp particles comprising an inner tubular shaped shell member with lifter blades mounted on its internal wall surface. The shell member is rotatably mounted within an outer shell member with seals between the shell members providing an isolated space. This space is pressurized with a gas to prevent pulp particles and gases from escaping from the inner shell member by way of the seals.