Peter J Mcguire

US Patent:

52413527, Aug 31, 1993

Filed:

Sep 21, 1992

Appl. No.:

7/947877

Inventors:

Clark V. Lange - Ontario NY
Peter J. McGuire - Rochester NY
Samuel P. Mordenga - Rochester NY

Assignee:

Xerox Corporation - Stamford CT

International Classification:

G03G 2100

US Classification:

355301

Abstract:

A cleaner brush in which air flow passes through the first node of the standing wave of brush fibers to facilitate removal of particles therefrom. A flexible seal maximizes the air flow through the brush fibers.

US Patent:

52803236, Jan 18, 1994

Filed:

Dec 30, 1991

Appl. No.:

7/814171

Inventors:

Jorge A. Alvarez - Rochester NY
Gary A. Denton - Webster NY
Peter J. McGuire - Rochester NY
Francisco Zirilli - Walworth NY

Assignee:

Xerox Corporation - Stamford CT

International Classification:

G03G 1509

US Classification:

355251

Abstract:

An electrophotographic printing machine in which an electrostatic latent image is recorded on a photoconductive surface by charging the appropriate areas of the surface to predetermined polarities. The latent image is a developed with toners of a preselected color and predetermined polarity by a developer unit. The developer unit includes a bead removal device which magnetically attracts carrier beads off the photoconductive surface and deposits these beads in a sump or reservoir of developer. The bead removal device includes a magnet and magnetic field shapers to enhance the magnetic fields which attract the beads in the zone between the surface and the bead removal device and attenuates the magnetic fields in the zone between the bead removal device and the sump or reservoir to reduce the attraction between the beads and the bead removal device in this zone. The invention also provides magnetic brush rollers for the delivery of toner to the photoconductive surface which have magnetic field shapers which attenuate the magnetic fields to encourage bead release from the roller and reduce attraction of beads to the roller in reverse rotation of the roller.