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. 15, 1988
Filed:
May. 09, 1986
Masao Fukushima, Shiga, JP;
Yoshihiko Bessho, Shiga, JP;
Masao Nishikawa, Shiga, JP;
Yasunari Yamaguchi, Shiga, JP;
Dainippon Screen Mfg. Co., Ltd., Kyoto, JP;
Abstract
The present invention relates to a toner development device for an electrophotographic copying machine and aims to attain a reproduced image without uneven thickness by stirring developers composed of toner and carrier and feeding the developers mixed uniformly in the longitudinal direction along a photosensitive drum. An electrostatic latent image produced on the photosensitive drum is made to be visible in contact with the developers retained in a brushlike state by magnetic force of a magnet roller thereon. The developers, of which a part of the toner is spent, is scraped off by the primary scraper of a scraping means, which is arranged so as to contact slidingly with the magnet roller. To the primary scraper, the secondary scraper is fixed for its fixed position to be adjusted forwards and rearwards in order to distribute the toner uniformly in the toner development device. The developers scraped off can be returned more to somewhat insufficient portions and less to somewhat excessive portions in a stirring means composed of a plurality of screw rollers through the outer edge of the secondary scraper of which position adjusted accordingly.