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:
Sep. 01, 1987
Filed:
Dec. 22, 1986
Frank Hacknauer, Honeoye Falls, NY (US);
Salvatore C DeFazio, Bergen, NY (US);
Richard S Fox, Rochester, NY (US);
Eastman Kodak Company, Rochester, NY (US);
Abstract
In electrographic apparatus a magnetic brush development station has a housing with a sump for holding a supply of developer material, and a magnetic brush that applies developer material from the sump to a latent image on a photoconductor. A rotatable transport roller is located between the sump and the magnetic brush. A magnet in the roller attracts developer material from the sump to the roller so that rotation of the roller can move the material toward the magnetic brush. A gating and metering member in the form of a cylindrical tube is positioned around the roller and spaced from it. The tube has two elongate, spaced slots, and the tube is rotatable between first and second positions. When the tube is in one of its positions developer material from the sump can pass through one of the slots to the roller and be transported to the other slot where it is metered to the magnetic brush. When the tube is in its second position the slots are offset from the sump and the brush to block the flow of developer material to the transport roller and to the magnetic brush.