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. 02, 1976
Filed:
Aug. 17, 1973
Yasumori Nagahara, Yokosuka, JA;
Kohji Suzuki, Yokohama, JA;
Ricoh Co., Ltd., Tokyo, JA;
Abstract
An electrically insulated minor portion is provided on the periphery of a photosensitive drum comprising a cylindrical supporter, a photoconductive strip wound in roll form on a supply reel disposed in the interior of the cylindrical supporter and paid out thereof to apply a portion thereof to a major portion of the outer periphery of the cylindrical supporter so that the portion may serve as a photoreceptor on which an electrostatic latent image of an original to be copied is formed. The strip portion on the outer periphery is withdrawn and wound on a take-up reel that is also disposed in the interior of the cylindrical supporter. The minor portion of the outer periphery of the cylindrical supporter has on its surface an electrically insulating layer with electrical resistance in the range of 1 to 5 .times. 10.sup.9 .OMEGA.cm, the layer consisting of a material which is not charged by frictional contact with either the magnetic developing brush or the cleaning brush.