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:
Aug. 13, 2002
Filed:
Jan. 16, 2001
Applicant:
Inventor:
Hirofumi Nakayasu, Kawasaki, JP;
Assignee:
Fujitsu Limited, Kawasaki, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G03G 1/500 ; G03G 1/501 ;
U.S. Cl.
CPC ...
G03G 1/500 ; G03G 1/501 ;
Abstract
A toner mark transfer unit transfers a halftone pattern such as a transverse line pattern or a slanted line pattern on a belt by using a plurality of electrostatic recording units. A toner density measurement unit figures out density control parameters such as emission time and emission current on the basis of the ratio of a reflected light (inter-line space width) from the toner free portion to a light (line width) attenuated due to a diffuse light from the toner bearing portion in a read signal of a halftone pattern from a sensor unit.