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:
Jun. 30, 1992
Filed:
May. 24, 1990
Applicant:
Inventors:
Shunichi Chiba, Numazu, JP;
Satoru Inoue, Mishima, JP;
Akio Matsui, Numazu, JP;
Yoshihisa Okamoto, Fuji, JP;
Chiharu Mochizuki, Numazu, JP;
Assignee:
Ricoh Company, Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G03G / ;
U.S. Cl.
CPC ...
430 45 ; 430106 ;
Abstract
A set of color developers for use in multi-color electrophotography comprises (a) a yellow developer, (b) a magenta developer, (c) a cyan developer, and (d) a black developer, in which the viscoelasticity (tan.delta..sup.1) of each of the yellow developer, the magenta developer and the cyan developer is smaller than the viscoelasticity (tan.delta..sup.2) of the black developer at a storage modulus (G'(.omega.)) of 10.sup.5 dyn/cm.sup.2. This set of color developers is particularly suitable for use with a digital multi-color electrophotography.