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:
Apr. 10, 1990
Filed:
Oct. 27, 1988
Eiichi Katoh, Tokyo, JP;
Ricoh Company, Ltd., Tokyo, JP;
Abstract
In a relatively simple copier lacking a discharging unit which erases those portions of a photoconductive element which precede and follow an image, a control device reduces the amount of toner consumed and the amount of toner collected while preventing toner from being scattered around. For a surface portion of the photoconductive element which is associated with a trailing edge portion of a paper to which the image is to be transferred, a charging operation of a charger adapted to charge the photoconductive drum and a charging operation of a transfer charger are stopped. A bias voltage to be applied to a surface portion of the photoconductive element which follows the above-mentioned surface portion is increased.