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:
May. 24, 1994
Filed:
Apr. 27, 1992
Koji Suzuki, Yokohama, JP;
Shigekazu Enoki, Kawasaki, JP;
Hiroshi Takashima, Yono, JP;
Naoki Iwata, Tokyo, JP;
Yuichi Ueno, Kawasaki, JP;
Ricoh Company, Ltd., Tokyo, JP;
Abstract
A developing apparatus using a developer carrier which is capable of forming microfields on the surface of the carrier. A great amount of sufficiently charged one-component developer is deposited on the surface of the developer carrier by the microfields and transported to a developing region to be supplied to an electrostatic latent image. The developer carrier has a plurality of surface portions, each having a particular characteristic, such that at least one surface portion holds a first charge while at least another surface portion holds a second charge that is equal to and of an opposite polarity to the first charge.