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:
May. 17, 1977
Filed:
Jun. 25, 1975
Toshio Hayashi, Tokyo, JA;
Osamu Haruyama, Tokyo, JA;
Ricoh Co., Ltd., Tokyo, JA;
Abstract
A roller is disposed parallel and adjacent to a photoconductive drum with a small gap inbetween. The roller is made of an electrically conductive material and covered with an insulating coating of hard anodized aluminum. The roller is fixed to a shaft which is driven to rotate the roller in the same direction as the drum to remove excess developing liquid from the drum through viscous friction. Electrically conductive bearings are mounted on the ends of the shaft which have an outer diameter greater than the diameter of the roller. The bearings rotatably contact the surface of the drum to maintain the gap. Either insulating plastic bushings or layers of alumite are disposed between the ends of the shaft and the bearings to insulate the shaft from the bearings and thereby from the drum.