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. 12, 2000
Filed:
Dec. 12, 1997
Applicant:
Inventors:
Mitsugu Sugiyama, Yokohama, JP;
Eiichi Sasaki, Sagamihara, JP;
Tadashi Shinohara, Tokyo, JP;
Kouichi Irie, Kashiwa, JP;
Yutaka Shio, Yokohama, JP;
Assignee:
Ricoh Company, Ltd., Tokyo, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G03B / ; H04N / ; H04N / ; G03G / ;
U.S. Cl.
CPC ...
358504 ; 358520 ; 358296 ; 358298 ; 399 44 ; 399 49 ; 355 83 ;
Abstract
In a color image forming apparatus, a test pattern is formed by a color toner and provided with multiple tones by a dither method. The toner density of the test pattern is accurately read by a simple structure and faithfully corresponds to the actual toner density.