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:
Jun. 26, 1979
Filed:
Jul. 08, 1977
Tatsuo Tani formerly Nishikawa, Tokyo, JP;
Toyoo Okamoto, Yokohama, JP;
Ricoh Company, Ltd., , JP;
Abstract
A transfer sheet separator for use with electrophotographic copying machines in which either a toner image or an electrostatic latent image on a photoreceptor drum is transferred to a transfer sheet. A separation roller is arranged near to the drum surface at a separation station for separating the image transferred sheet which inevitably carries residual charge from the drum by electrostatic attraction. To this end, the roller is made from conductive material and either connected to the ground so as to be able to carry the opposite polarity charge than said charge by induction or floated and applied a bias potential of the opposite polarity. Alternatively, the roller is made of dielectric material and charged as well through a rubbing action, for example. With this electrostatic separation means, mechanical means cooperates for practical purposes to ensure such operation.