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:
May. 07, 1985
Filed:
Jan. 12, 1983
Kohji Suzuki, Yokohama, JP;
Ricoh Company, Ltd., Tokyo, JP;
Abstract
A magnet brush cleaning apparatus for removing a toner which has been left non-transferred on the surface of a photoconductive element. The residual toner is attracted by and supported on a rotary sleeve on which a magnetic carrier forms a magnet brush. The magnetic carrier separated from the magnet brush and the residual toner are separated from each other by an electrode which is disposed in a circulatory carrier supply path in order to develop an intense electric field. The thus separated carrier is returned to the sleeve. The electrode may take the form of a roller, a plate or a wire. The residual toner on the photoconductive element has its amount of charge reduced in advance by a discharging unit. A substantial amount of the residual toner is scraped off the photoconductive element by a fur brush. A desired amount of the carrier is discharged and replenished automatically in response to lowering of the cleaning ability of the apparatus.