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:
Jul. 09, 1991
Filed:
Feb. 28, 1990
Applicant:
Inventor:
Atsushi Narukawa, Nara, JP;
Assignee:
Sharp Kabushiki Kaisha, Osaka, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G03G / ; G03G / ;
U.S. Cl.
CPC ...
364525 ; 355208 ; 355246 ; 430102 ;
Abstract
After a two-component developer with known toner concentration is poured into a tank and begins to be stirred, its toner density is measured quickly at least three times by a toner density sensor and the final value to which the output of this sensor is expected to converge is calculated from these measured values such that a reference value by which the supply of toner is controlled can be estimated much more quickly than by waiting for the output of the sensor to stabilize.