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. 06, 1994
Filed:
Jun. 30, 1993
Shunichi Chiba, Kawasaki, JP;
Nobuhiro Nakayama, Susono, JP;
Yasuo Asahina, Numazu, JP;
Yosihisa Okamoto, Fuji, JP;
Kayo Makita, Numazu, JP;
Ricoh Company, Ltd., Tokyo, JP;
Abstract
A multi-color electrophotographic image formation method of a digital type for forming multi-color images is disclosed, in which latent electrostatic images corresponding to yellow, magenta, cyan and black images separated from an original image are developed with a yellow developer, a magenta developer, a cyan developer and a black developer, respectively to form visible yellow, magenta, cyan and black images, and the visible yellow, magenta, cyan and black images are fixed to an image receiving member, with the reflection image density (ID.sub.ref) and the transmission image density (ID.sub.tr) of the fixed black images formed by the black developer being in the relationship of ID.sub.ref .gtoreq.1.8.times.ID.sub.tr when the deposition of the black developer is in the range of 1.0 mg/cm.sup.2 or less.