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:
Mar. 19, 1996
Filed:
Jun. 05, 1995
Koichi Noguchi, Tokyo, JP;
Ricoh Company, Ltd., Tokyo, JP;
Abstract
An electrophotographic digital copier for sequentially writing bicolor image data signals onto a photoconductive element and producing a bicolor hard copy by a single image transfer. The copier has a black developing device and a red developing device for developing respectively a latent image electrostatically formed by a black image data signal on a photoconductive element and a latent image electrostatically formed by a red image data signal. A signal detecting device determines whether or not the red image data is present. A control device starts the drive of the red developing device when the signal detecting device detects the red image data signal and ends the drive on upon the elapse of a predetermined period of time after the signal detecting device determines, during the driving of the red developing device that the red image data signal is absent.