Paul W Morehouse

US Patent:

7366453, Apr 29, 2008

Filed:

Oct 31, 2005

Appl. No.:

11/262575

Inventors:

Michael D. Thompson - Rochester NY, US
James M. Chappell - Webster NY, US
Steven C. Hart - Webster NY, US
Patrick J. Howe - Fairport NY, US
Ajay Kumar - Fairport NY, US
Steven R. Leroy - Hilton NY, US
Paul W. Morehouse - Webster NY, US
Palghat S. Ramesh - Pittsford NY, US
Fei Xiao - Penfield NY, US

Assignee:

Xerox Corporation - Norwalk CT

International Classification:

G03G 15/09

US Classification:

399269, 399274, 399276

Abstract:

A development subsystem is used to develop developer having semiconductive carrier particles and toner particles. The development subsystem includes a developer housing, for retaining a quantity of developer having semiconductive carrier particles and toner particles, a first magnetic roll having a stationary core with at least one magnet and a sleeve that rotates about the stationary core of the first magnetic roll, a second magnetic roll having a stationary core with at least one magnet and a sleeve that rotates about the stationary core of the second magnetic roll, and a motor coupled to the first and the second magnetic rolls to drive the rotating sleeves of the first and the second magnetic rolls in a direction that is against the direction of a photoreceptor that rotates in proximity to the first and the second magnetic rolls. The first and the second magnetic rolls carry semiconductive carrier particles and toner particles through a development zone formed by the first and the second magnetic rolls.

US Patent:

7869739, Jan 11, 2011

Filed:

Jun 4, 2009

Appl. No.:

12/478445

Inventors:

Dale R. Mashtare - Bloomfield NY, US
Martin E. Banton - Fairport NY, US
Edul N. Dalal - Webster NY, US
John S. Facci - Webster NY, US
Steve P. Hoover - Penfield NY, US
John F. Knapp - Fairport NY, US
Robert P. Loce - Webster NY, US
Michael J. Martin - Hamlin NY, US
Karen Ann Moffat - Brantford, CA
Paul W. Morehouse - Webster NY, US
William J. Nowak - Webster NY, US
Richard Philip Nelson Veregin - Mississauga, CA
Thomas C. Hollar - Penfield NY, US

Assignee:

Xerox Corporation - Norwalk CT

International Classification:

G03G 15/00

US Classification:

399107, 399110, 399111

Abstract:

A xerographic marking device includes an intermediate transfer unit, a media transport path and at least one two-color image-on-image (IOI) drum module. Each two-color IOI drum module includes in a process order around a photoreceptor: a) a first charging unit; b) a first exposure unit; c) a first development unit; d) a second charging unit; e) a second exposure unit; and f) a second development unit, wherein the intermediate transfer unit receives a first toned image and a second toned image from the photoreceptor in a single transfer and transfers those toner images to print media to produce a toned image on print media. In various embodiments, specific color pairings are provided.

US Patent:

20030133728, Jul 17, 2003

Filed:

Jan 16, 2002

Appl. No.:

10/046149

Inventors:

Edward Caruthers - Rochester NY, US
Paul Morehouse - Webster NY, US
Henry Till - East Rochester NY, US

Assignee:

XEROX CORPORATION - Stamford CT

International Classification:

G03G015/16

US Classification:

399/296000

Abstract:

A system and method of applying a controlled amount of fluid to a moveable image carrying member of an electrographic printing system using a liquid toner before an image is transferred to a substrate. The amount of fluid applied may be controlled by a re-wet roller, located between the toner station and the transfer station, whose distance from the moveable image carrying member is varied along with the rotational speed and direction of the re-wet roller, according to either the roughness and porosity of the substrate or the print quality of the substrate. Alternatively, the fluid may be directly applied just to image areas of the moveable image carrying member to improve print quality.

US Patent:

20040114955, Jun 17, 2004

Filed:

Dec 13, 2002

Appl. No.:

10/319172

Inventors:

John Facci - Webster NY, US
Paul Morehouse - Webster NY, US

Assignee:

Xerox Corporation

International Classification:

G03G015/02

US Classification:

399/089000, 399/176000

Abstract:

An apparatus and process for applying an electrical charge to a photoreceptor wherein a bias charge roll member is situated in contact or in close proximity with a surface of member to be charged such as a photoreceptor. The bias charge roll member is supplied with an electrical bias having a rectified AC waveform onto which a DC bias is superimposed after the waveform has been rectified. The result is the ability to raise the voltage potential of the photoreceptor with less pulse voltage and, more particularly, to increase the voltage potential of the photoreceptor along as if only DC voltage were applied far above what is possible in the prior art. Among the advantages of the invention is the ability to minimize photoreceptor wear at higher levels of photoreceptor charge since the DC-offset bias enables the second Paschen threshold to be avoided for higher levels of the photoreceptor charge.

US Patent:

20040114956, Jun 17, 2004

Filed:

Dec 13, 2002

Appl. No.:

10/319201

Inventors:

John Facci - Webster NY, US
Michael Levy - Webster NY, US
Paul Morehouse - Webster NY, US
Rachael McGrath - Churchville NY, US

Assignee:

Xerox Corporation

International Classification:

G03G015/02

US Classification:

399/089000, 399/176000

Abstract:

An apparatus and process for applying an electrical charge to a photoreceptor wherein a bias charge roll member is situated in contact or in close proximity with a surface of a member to be charged such as a photoreceptor. The bias charge roll member is supplied with an electrical bias having a variable voltage waveform onto which a DC bias is superimposed. The amount of DC bias is selected to set the signal voltage such that a minimally acceptable amount of AC corona is created sufficient for uniform photoreceptor charging while avoiding unnecessary excessive positive corona that causes excessive photoreceptor wear.

US Patent:

20050111893, May 26, 2005

Filed:

Nov 25, 2003

Appl. No.:

10/721845

Inventors:

Mary McStravick - Fairport NY, US
Paul Morehouse - Webster NY, US

International Classification:

G03G021/00

US Classification:

399354000

Abstract:

An apparatus for removing charged particles from a surface, the surface being capable of movement, including: a conductive brush in contact with the surface, the conductive brush having a first region thereof having a first polarity and a second region having a second polarity; the conductive brush includes a core and conductive fibers attached thereto, the core being electrically segmented into the first region and the second region.

US Patent:

20050250031, Nov 10, 2005

Filed:

Mar 21, 2005

Appl. No.:

11/083934

Inventors:

Maria Mc Dougall - Burlington, CA
Richard Veregin - Mississauga, CA
Vladislav Skorokhod - Mississauga, CA
Mary Mc Stravick - Fairport NY, US
Deepak Maniar - Webster NY, US
Paul Morehouse - Webster NY, US
Rachael Mc Grath - Churchville NY, US
Jackie Parker - Mississauga, CA
Shigang Qui - Toronto, CA
Mary Schlitzer - Rochester NY, US
Michael Thompson - Rochester NY, US
Christopher Pattison - Rochester NY, US
Thomas Dombroski - Rochester NY, US

Assignee:

XEROX CORPORATION - Stamford CT

International Classification:

G03G009/08

US Classification:

430108600, 430111410, 430109300, 430108700

Abstract:

A developer includes black toner particles and carrier particles, the black toner particles including at least one binder, at least one black colorant and one or more external additives, wherein the toner particles comprise from about 7 to about 15 pph of the developer, and wherein the toner particles exhibit a triboelectric charge of from about −25 to about −50 μC/g at toner particle concentrations of about 7 to about 15 pph of the developer. The developer is ideally suited for use in a high speed (greater than 100 prints per minute) semiconductive magnetic brush development apparatus. Preferably, the black toner particles include a styrene acrylate binder, and the external additives include from about 1.3 to about 2.1% by weight of the toner particles of a first silica having an average particle size of from about 35 to about 45 nm, from about 0.5 to about 1.0% by weight of the toner particles of a second silica having an average particle size of from about 135 to about 160 nm, and from about 0.2 to about 0.5% by weight of the toner particles of a titania having an average particle size of from about 35 to about 45 nm, with an external additive toner surface area coverage of from about 25 to about 45%.

US Patent:

20070189793, Aug 16, 2007

Filed:

Feb 14, 2006

Appl. No.:

11/353259

Inventors:

Bruce Thayer - Webster NY, US
Paul Morehouse - Webster NY, US
Michael Thompson - Rochester NY, US

International Classification:

G03G 15/08
G03G 21/00

US Classification:

399055000, 399071000, 399353000, 399354000, 399285000, 399279000

Abstract:

This is an electrophotographic marking system that effectively cleans residual toner and toner additives from the surface of a photoreceptor. This cleaning process reduces ghosting problems that had been encountered in final copies produced by electrophotographic systems such as in copiers, printers and duplicators. This cleaning is accomplished by expedients such as increasing a cleaning brush bias, and by increasing the surface area of cleaning brushes used in the system. In addition, the development process is desensitized to the development of ghosting. This desensitizing is accomplished by expedients such as increasing the gap between the development roll and the photoreceptor and by reducing the AC development electrical bias.