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:
Aug. 26, 1986
Filed:
Feb. 23, 1984
Haruya Osaka, Osaka, JP;
Hiroshi Kimura, Habikino, JP;
Masahiko Hisajima, Osaka, JP;
Yutaka Shigemura, Takarazuka, JP;
Seiji Kaminaga, Matsudo, JP;
Shinobu Satonaka, Toyonaka, JP;
Mitsuya Ishito, Sakai, JP;
Mita Kogyo Kabushiki Kaisha, , JP;
Abstract
An automatic developing bias control device for an electrophotographic copying machine in which a document image is led onto a photoreceptor through a lens to form an electrostatic latent image on the photoreceptor and the electrostatic latent image is visualized into a toner image by a developing device, the automatic developing bias control device operating on the principle of detecting the density of the document image by a detecting element disposed inside or outside the optical path, delaying the output detection signal for a predetermined time, and imposing a developing bias potential corresponding to the delayed output detection signal on the developing device to thereby provide copy image quality faithful to the original.