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:
Feb. 19, 1991
Filed:
Dec. 18, 1989
Timothy W Reynolds, Rochester, NY (US);
Eastman Kodak Company, Rochester, NY (US);
Abstract
An electrostatic scavenger roller within the development apparatus of an electrostatographic copier or printer for recovering unwanted charged carrier particles (DPU) from the image-bearing surface of such copier or printer after development. The scavenger roller, which is mounted rotatably adjacent the image-bearing surface and within reach of first magnetic fields on the alternating pole magnets of a rotatable development roller, includes a magnetic drive disk at each end thereof. Each of the magnetic drive disks consists of a series of alternating pole magnets fixedly disposed inside the scavenger roller for rotation therewith, and each generates a second magnetic field which overlaps the first magnetic fields of the development roller. As such, rotation of the development roller magnetically induces rotation of the magnetic disks and, hence, rotation of the scavenger roller, thereby bringing the electrostatically recovered carrier particles (DPU) thereon, around and into the first magnetic fields for magnetic recapture by the magnetic development roller.