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:
Dec. 03, 1996
Filed:
Jan. 19, 1995
Riccardo Forlani, Turin, IT;
Renato Bortolin, Castellamonte, IT;
Riccardo Dal Bianco, Turin, IT;
Roberto Guelfo, Montanaro, IT;
Olivetti-Canon Industriale S.p.A., Ivrea, IT;
Abstract
In an electrostatic image developing device for electrical photocopiers, a magnetizable one-component toner, initially contained in a removable container, is fed, by the action of a rotating flexible strip, through a development chamber towards a rotating non-magnetic development roller surrounding a number of stationary permanent magnets, forming on it a magnetic brush, whose thickness is controlled by a non-magnetic flexible blade pressed against the surface of the development roller; the development chamber is fitted with three stirring bars made of non-magnetic material, each bar describing a different closed path in different zones of the development chamber in such a way as to avoid the formation of lumps and to maintain the correct fluidity of the toner. In addition, a metallic wire is fitted in the development chamber and acts as a sensor device to detect when the removable container is nearly empty of toner.