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:
Feb. 27, 1979
Filed:
Dec. 15, 1976
Ronald E Gaitten, Boulder, CO (US);
Gerald L Smith, Broomfield, CO (US);
International Business Machines Corporation, Armonk, NY (US);
Abstract
A two cycle process electrophotographic copying device having charging, imaging, developing, transferring, and cleaning facilities, the arrangement being in the conventional sense, incorporates a combined charge and preclean corona unit that is operable to perform either a charging function or a precleaning function at the proper time during a copying/cleaning cycle and a combined precharge/transfer corona unit. The combined charge and preclean corona unit includes a dual bay corona which emits negative and positive ions and a common control grid for controlling the ion flow from each bay of the dual bay corona.