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:
Oct. 07, 1980
Filed:
Nov. 08, 1978
Makoto Hashimoto, Kawasaki, JP;
Ricoh Company, Ltd., Tokyo, JP;
Abstract
The magnetic brush development apparatus comprises two magnetic rollers, namely a development roller for developing a latent electrostatic image and a developer feed roller for supplying a magnetic developer to the development roller. The quantity of the magnetic developer transferred from the developer feed roller to the development roller is initially regulated by a particular arrangement of the magnets disposed in the development roller and the developer feed roller. Furthermore, the quantity of the magnetic developer on the development roller is regulated by a doctor member prior to development. In order to keep the bulk density of the developer on the development roller constant, a preliminary pressure plate is provided for applying pressure to the developer on the development roller so that a uniform and high bulk density magnetic brush is formed on the development roller.