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:
Jan. 19, 2021
Filed:
Sep. 12, 2019
Minoru Masuda, Shizuoka, JP;
Hiroshi Yamashita, Shizuoka, JP;
Ryota Inoue, Shizuoka, JP;
Yuka Mizoguchi, Shizuoka, JP;
Daichi Hisakuni, Shizuoka, JP;
Tomomi Harashima, Shizuoka, JP;
Minoru Masuda, Shizuoka, JP;
Hiroshi Yamashita, Shizuoka, JP;
Ryota Inoue, Shizuoka, JP;
Yuka Mizoguchi, Shizuoka, JP;
Daichi Hisakuni, Shizuoka, JP;
Tomomi Harashima, Shizuoka, JP;
Ricoh Company, Ltd., Tokyo, JP;
Abstract
An image forming apparatus is provided that includes: first and second electrostatic latent image bearers; first and second electrostatic latent image forming devices; first and second developing devices configured to develop first and second electrostatic latent images with a colored toner and a special-color toner to form a colored toner image and a special-color toner image, respectively; a primary transfer device configured to transfer the colored toner image and the special-color toner image onto an intermediate image bearer in an overlapping manner to form a composite toner image; a secondary transfer device configured to transfer the composite toner image onto a recording medium; and a fixing device configured to fix the composite toner image thereon. The special-color toner comprises plate-like and/or film-like pigments. An absolute difference in volume resistivity between the special-color toner and the colored toner is 0.30 log Ω cm or less.