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. 14, 1993
Filed:
Apr. 01, 1992
Koji Suzuki, Yokohama, JP;
Naoki Iwata, Tokyo, JP;
Yuichi Ueno, Kawasaki, JP;
Shigekazu Enoki, Kawasaki, JP;
Junko Tomita, Tokyo, JP;
Ricoh Company, Ltd., Tokyo, JP;
Abstract
A developing device incorporated in an image forming apparatus and having a developing roller or similar image carrier for transporting a developer to a photoconductive element or similar image carrier to develop an electrostatic latent image formed on the image carrier. The developing roller is configured to form microfields on the surface thereof. An alternating voltage is applied to the developing roller as a bias voltage for development to thereby deposit a non-magnetic toner on the surface of the roller. Silica particles are admixed with the toner. The developing device is operable with an adequate developing bias at all times.