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:

6725101, Apr 20, 2004

Filed:

Dec 13, 2000

Appl. No.:

09/736520

Inventors:

Rene E. Sanchez - Berkeley CA
Joannes N. M. de Jong - Suffern NY
Lloyd A. Williams - Mahopac NY
Vincent M. Williams - Palmyra NY
Daniel W. Costanza - Webster NY

Assignee:

Xerox Corporation - Stamford CT

International Classification:

G05B 1302

US Classification:

700 45, 700261

Abstract:

A non-linear control (NLC) system for controlling performance of a device. The NLC system comprises a controller system and a first feedback compensator connected to the controller. The first feedback compensator compensates for linear error performance of the device; the second feedback compensator compensates for non-linear error performance of the device.

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:

8033544, Oct 11, 2011

Filed:

Dec 8, 2009

Appl. No.:

12/633012

Inventors:

Matthew Dondiego - West Milford NJ, US
Lloyd A. Williams - Mahopac NY, US
Joannes N. M. deJong - Hopewell Junction NY, US

Assignee:

Xerox Corporation - Norwalk CT

International Classification:

B65H 9/16
B65H 7/02

US Classification:

271252, 271228, 271227

Abstract:

According to aspects illustrated herein, there is provided a printmaking device, a method, and a system for calibrating sensors. The printmaking device includes a calibration system with a media path, a registration device, and at least one edge sensor. The registration device having a pair of nips connected by a lateral carriage and a calibration member disposed traversely and affixed to the lateral carriage. The lateral carriage is configured to move laterally relative to the media path. The at least one edge sensor may be configured to determine an extent of movement of a first portion of the calibration member. The registration device calibrates the at least one edge sensor by: moving the lateral carriage a predetermined distance; determining the extent of movement of the first portion of the calibration member; and comparing the predetermined distance and the extent of movement so as to determine the calibration factor.

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.