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. 31, 1989
Filed:
Mar. 19, 1987
Ricoh Company Ltd., Tokyo, JP;
Abstract
An electrophotographic recording apparatus having a photoconductive element, means for providing an electrostatic latent image on the photoconductive element which corresponds to image light, a developing device for developing the latent image to produce a visible image, means for transferring the visible image onto a paper, and means for cleaning the surface of the photoconductive element after the transfer of the visible image. Developers of different colors are selectively supplied to the single developing device to selectively record images in different colors. When a predetermined period of time has expired with no recording action taken after the completion of color recording, a developer collection system is communicated to a cleaning liquid vessel. This shortens the period of time necessary for the next change of recording color and recording operation while allowing a minimum of damage to result from a trouble in the developer collection system.