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:
Jul. 13, 1982
Filed:
Apr. 20, 1979
Hiroshi Kinashi, Uji, JP;
Yoshihisa Miwa, Yamatokoriyama, JP;
Shoshichi Kato, Yamatokoriyama, JP;
Hiroyuki Kawataki, Kakogawa, JP;
Sharp Kabushiki Kaisha, Osaka, JP;
Yahata Electric Works Ltd., Kakogawa, JP;
Abstract
An electrophotographic apparatus employs an alternating current corona discharge apparatus for the purpose of forming an electrostatic image on a photosensitive member. The alternating current corona discharge apparatus has a transformer for transforming or stepping up the alternating current source voltage, the secondary winding of which is connected to the ground at one end. The secondary winding is shunted by a series connection of a first plurality of varistors. A smaller second plurality of series connected varistors selected from the first plurality of series connected varistors are shunted by a first diode-resistor series connection of a diode with the cathode on the ground side and a variable resistor and a smaller and third plurality of different series connected varistors selected from the first plurality of series connected varistors are shunted by a second diode-resistor series connection of a diode with the anode on the ground side and a variable resistor. The non-grounded end of the secondary winding is connected to a wire electrode of the corona discharge apparatus and the grounded end of the secondary winding is connected to a shield plate enclosing the wire electrode.