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. 11, 1986
Filed:
Nov. 09, 1983
Richard D Hebert, Sunnyvale, CA (US);
Victor B Van Blerk, San Jose, CA (US);
Ricoh Company, Ltd., Tokyo, JP;
Abstract
In an electrophotographic copier, a dielectric shield is provided extending from a point adjacent the corona discharge device to a point close to the entry of the charged surface sheet of paper into the transfer nip area. The ion shield is formed of a sheet of dielectric material which extends from the cover of the corona discharge device to a point only slightly displaced to the entry side of the transfer nip. The ionic shield is biased to press against the surface of the paper so that air flow leakage to the surface of the photoconductive drum is minimized. The air flow which is naturally created by the movement of the paper is channelled out to the sides of the dielectric shield and is disbursed in an area away from the photoconductive drum.