Lloyd Williams

US Patent:

6412907, Jul 2, 2002

Filed:

Jan 24, 2001

Appl. No.:

09/768707

Inventors:

Vittorio Castelli - Yorktown Heights NY
Joannes N. M. deJong - Suffern NY
Lloyd A. Williams - Mahopac NY
Barry Wolf - Yorktown Heights NY
Harold M. Anderson - Rancho Palo Verdes CA

Assignee:

Xerox Corporation - Stamford CT

International Classification:

A41J 3407

US Classification:

347 37, 347 19

Abstract:

An apparatus and method are provided for the use of an optical sensor to determine the position of a printing device relative to a piece of paper or a paper-handling surface. The optical sensor reads marks to detect movement and/or direction of movement or spacing of imprints on the paper. Benefits include swath stitching calibration, color to color registration, producing printing device alignment data and generating information for printing device firing signals. The present invention is applicable to a wide field of printing technologies, including, but not limited to, acoustic ink printing, thermal ink jet printing, piezo ink jet printing, ionographic printing and a variety of other printing technologies involving the need for positioning a printing device relative to a piece of paper.

US Patent:

6456309, Sep 24, 2002

Filed:

Jul 26, 2000

Appl. No.:

09/626465

Inventors:

Elias Panides - Whitestone NY
Joannes N. M. deJong - Suffern NY
Lloyd A. Williams - Mahopac NY
Vittorio Castelli - Yorktown Heights NY
Barry M. Wolf - Yorktown Heights NY

Assignee:

Xerox Corporation - Stamford CT

International Classification:

B41J 2385

US Classification:

347116, 347235

Abstract:

Color electrophotographic printers having latent image positions synchronized with start-of-scan signals. A laser source projects a laser beam onto a multifaceted rotating polygon that sweeps that beam in a scan line across a moving photoreceptor. A start-of-scan detector produces start-of-scan signals when the laser beam is in position to write a scan line. A belt sensor produces belt signals when indicia on the photoreceptor passes a reference position. A controller receives the belt signals and the start-of-scan and then adjusts the photoreceptors rotational velocity such that the belt signals are an integral multiple of the start-of-scan signals. To reduce the impact of drive roller eccentricities on belt signal to start-of-scan signal timing, the perimeters of photoreceptor roller elements are sub-multiples of the photoreceptor length.

US Patent:

6736561, May 18, 2004

Filed:

Jan 24, 2001

Appl. No.:

09/768867

Inventors:

Vittorio Castelli - Yorktown Heights NY
Joannes N.M. deJong - Suffern NY
Lloyd A. Williams - Mahopac NY
Harold M. Anderson - Rancho Palo Verdes CA

Assignee:

Xerox Corporation - Stamford CT

International Classification:

B41J 1310

US Classification:

400645, 400642

Abstract:

The present invention provides a capability to form an image along a trailing edge of the paper by the use of a trailing edge deletion prevention apparatus capable of manipulating the paper to allow components capable of forming the image to travel in proximity to the paper without obstruction. In various embodiments, the invention involves the use of a biasing member or an interdigitated support element, each providing a trailing edge deletion prevention capability.

US Patent:

7126621, Oct 24, 2006

Filed:

Jul 30, 2004

Appl. No.:

10/909075

Inventors:

Vittorio Castelli - Yorktown Heights NY, US
Joannes N. M. deJong - Hopewell Junction NY, US
Lloyd A. Williams - Mahopac NY, US
Matthew Dondiego - West Milford NJ, US
William J. Nowak - Webster NY, US

Assignee:

Xerox Corporation - Stamford CT

International Classification:

B41J 2/47

US Classification:

347234

Abstract:

An imaging device for producing multicolor images from image data containing data representing an image of a first color and an image of a second color to be registered relative to the image of the first color onto a substrate by transferring toner of the first and second colors to the substrate is provided. The imaging device includes a first imager, a second imager, a photoreceptor belt, a plurality of rollers mounted to a frame of the imaging device, an angular position sensor, an image data source and a controller. The plurality of rollers define a process path along which the photoreceptor belt is driven past the first and second imagers in a process direction. The plurality of rollers includes a drive roller that exhibits an eccentricity for which a formula relating angular position as a function of the phase angle of the drive roller to eccentricity is known. The angular position sensor detects the phase angle of the drive roller. The image data source generates image data that includes a line to be printed in the first color and in the second color.

US Patent:

8419144, Apr 16, 2013

Filed:

May 11, 2010

Appl. No.:

12/777777

Inventors:

Ruddy Castillo - Briarwood NY, US
Barry Paul Mandel - Fairport NY, US
Lloyd A. Williams - Mahopac NY, US
James L. Giacobbi - Penfield NY, US
Frank A. Porter - Penfield NY, US
Joannes DeJong - Hopewell Junction NY, US

Assignee:

Xerox Corporation - Norwalk CT

International Classification:

B41J 25/308

US Classification:

347 8, 347 16, 347 19

Abstract:

An inkjet printing system includes a sensor positioned proximate a media transport path in an inkjet printing system, the sensor being configured to detect a media height exceeding a predetermined height with reference to the media transport path, and a controller associated with the inkjet printing system, the controller being configured to modify operation of the inkjet printing system in response to the sensor detecting a media height exceeding the predetermined height.

US Patent:

20020097291, Jul 25, 2002

Filed:

Jan 24, 2001

Appl. No.:

09/768681

Inventors:

Vittorio Castelli - Yorktown Heights NY, US
Joannes deJong - Suffern NY, US
Lloyd Williams - Mahopac NY, US
Harold Anderson - Rancho Palo Verdes CA, US

Assignee:

Xerox Corporation

International Classification:

B41J029/393

US Classification:

347/019000

Abstract:

A variety of encoder wheels and encoder wheel sensors are provided to provide precise paper locating capability relative to a printing device in an image forming system.

US Patent:

20110139577, Jun 16, 2011

Filed:

Dec 14, 2009

Appl. No.:

12/637218

Inventors:

Elias Panides - Whitestone NY, US
Ruddy Castillo - Briarwood NY, US
Joannes N. M. de Jong - Hopewell Junction NY, US
Lloyd A. Williams - Mahopac NY, US
Liang-Bih Lin - Rochester NY, US
Bin Zhang - Penfield NY, US

Assignee:

Xerox Corporation - Norwalk CT

International Classification:

B65G 47/00
B23P 11/00

US Classification:

1983391, 29428

Abstract:

Provided are vacuum transport systems, methods of making them and methods of transporting one or more objects. In accordance with various embodiments, there is a vacuum transport system including a vacuum plenum and one or more transport members configured to rotate around the vacuum plenum and wherein at least one of the one or more transport members can include a substrate, the substrate including a plurality of holes extending from a first side proximate to the vacuum plenum to a second side proximate to an object, wherein a surface of the second side comprises a textured surface having an average roughness Ra of about 2 μm to about 100 μm.

US Patent:

56976089, Dec 16, 1997

Filed:

Jun 26, 1996

Appl. No.:

8/669727

Inventors:

Vittorio R. Castelli - Yorktown Heights NY
Joannes N. M. deJong - Suffern NY
Lloyd A. Williams - Mahopac NY
Barry M. Wolf - Yorktown Heights NY

Assignee:

Xerox Corporation - Stamford CT

International Classification:

B65H 702

US Classification:

271228

Abstract:

An apparatus and method for registering and deskewing a sheet along a paper path. A pair of independently driven selectively actuable nips are used to drive a sheet transverse to a paper path direction until the edge of a sheet is registered laterally and in skew. The transverse nips are then deactivated and a drive nip moves the sheet in a process direction along the paper path. A first transport sensor senses the lead edge of a sheet, a second sensor is used to also detect the lead edge of a sheet within a certain distance from the detection by the first sensor. The transport drive nip can then be adjusted based on the transport time between the first transport sensor and the second transport sensor so that the sheet arrives at a registration sensor at the prescribed time. This apparatus and method allows the use of simple point type sensors as opposed to more complex and expensive sensor arrays.