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:
Mar. 31, 1992
Filed:
Mar. 22, 1991
Applicant:
Inventor:
James J Molloy, Lexington, KY (US);
Assignee:
International Business Machines Corporation, Armonk, NY (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G03G / ;
U.S. Cl.
CPC ...
355245 ; 118653 ; 222D / ; 355260 ;
Abstract
Metering roller (3) in the electrophotographic developer cartridge (1) is unsymmetrical along its length. As the metering roller rotates it distributes toner (11) both ways between chamber 13 and chamber 19 to maintain an equilibrium level (31) between the chambers. The unsymmetrical roller simultaneously reduces and increases the area of chamber 11, and possibly also provides a significant open path to chamber 19 across its flat surfaces (35), to inherently eliminate significant pressure build-up in chamber 13. The need for a vent between the chambers is eliminated.