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:
Jan. 29, 1985
Filed:
Oct. 17, 1983
Keitaro Yamashita, Saitama, JP;
Hiromi Kashiwagi, Kumagaya, JP;
Hitachi Metals, Ltd., , JP;
Abstract
A developing apparatus for developing an electrostatic latent image by means of a magnetic toner. The apparatus includes a non-magnetic cylindrical sleeve accommodating a first magnet roll and disposed to face the surface of a photosensitive roll, a developing tank for supplying the non-magnetic sleeve with the magnetic toner, and a blade disposed at the outlet of the developing tank for adjusting the thickness of the magnetic toner which is conveyed on the surface of the sleeve due to a relative rotation between the sleeve and the first magnet roll. The apparatus further includes a detector disposed at the upstream side of the blade as viewed in the direction of convey of the magnetic toner for detecting the amount of the magnetic toner, a second magnetic roll disposed at the toner outlet of a toner tank for controlling the amount of the magnetic toner supplied through the toner outlet to the developing tank, and a motor for selectively rotating the second magnetic roll in accordance with a signal produced by the detector.