Lloyd E Williams

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:

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:

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:

41764862, Dec 4, 1979

Filed:

Jul 8, 1977

Appl. No.:

5/813868

Inventors:

Lloyd Williams - New York NY

International Classification:

G09F 718

US Classification:

40607

Abstract:

A display frame, which carries a sheet of mylar metalized to provide a mirror and an advertising display placard, is provided with a number of straps disposed for coaction with a turnbuckle type mounting device to securely position the display upon pillars of I-beam configuration such as those found in subway and train stations. The turnbuckle assembly of the mounting device is such as to exert compressive forces against opposed inner faces of the I-beam flanges and, in one embodiment, coacts with straps secured to the rear wall of the display to mount the display across the edges of said I-beam flanges so as to hide the mounting means in the space behind the display and between the flanges and web of the I-beam pillar. The display frame is formed with one or more advertising placard mounting sections formed with grooves to facilitate positioning and easy removal of the placards which carry an advertising message. Such display sections in some embodiments are at an angle with respect to the mirror.

US Patent:

56193130, Apr 8, 1997

Filed:

May 1, 1995

Appl. No.:

8/431803

Inventors:

Gerald A. Domoto - Briarcliff Manor NY
John F. Knapp - Fairport NY
Vittorio Castelli - Yorktown Heights NY
Joannes N. M. deJong - Suffern NY
Lloyd A. Williams - Mahopac NY

Assignee:

Xerox Corporation - Stamford CT

International Classification:

G03G 1510
G03G 1514

US Classification:

399233

Abstract:

A method and apparatus for simultaneously developing and transferring a liquid toner image. The method includes the steps of moving a photoreceptor including a charge bearing surface having a first electrical potential, applying a uniform layer of charge having a second electrical potential onto the charge bearing surface, and imagewise dissipating charge from selected portions on the charge bearing surface to form a latent image electrostatically, such that the charge-dissipated portions of the charge bearing surface have the first electrical potential of the charge bearing surface. The method also includes the steps of moving an intermediate transfer member biased to a third electrical potential that lies between said first and said second potentials, into a nip forming relationship with the moving imaging member to form a process nip. The method further includes the step of introducing charged liquid toner, having a fourth electrical potential, into the process nip, such that liquid toner sandwiched within the nip simultaneously develops image portions of the latent image onto the intermediate transfer member, and background portions of the latent image onto the charge bearing surface of the photoreceptor.

US Patent:

52871622, Feb 15, 1994

Filed:

Jun 16, 1992

Appl. No.:

7/899187

Inventors:

Joannes N. M. de Jong - Suffern NY
Vittorio R. Castelli - Yorktown Heights NY
Harold M. Anderson - Rancho Palos Verdes CA
Lloyd Williams - Mahopac NY

Assignee:

Xerox Corporation - NY

International Classification:

G03G 1501

US Classification:

355326R

Abstract:

A detection system includes a marking device for applying to a process medium a first chevron from a first printer, a second chevron from a second printer and a third chevron from both the first printer and the second printer, the third chevron having a first element applied from the first printer and a second element applied from the second printer. The detection system further includes a detection device for detecting a matrix of times including three pluralities of times, each of the three pluralities of times corresponding to a respective time of passage of the first, second and third chevrons by the detection device. The detection system further includes a determining device for determining the alignment error based on a function of the three pluralities of times. A control system includes a marking device for applying to a process medium a first chevron from a first printer, a second chevron from a second printer and a third chevron from both the first printer and the second printer. The control system further includes a detection device for detecting a matrix of times including three pluralities of times, each of the three pluralities of times corresponding to a time of passage of a respective one of the first, second and third chevrons by the detection device, a determining device for determining an alignment error based on a function of the matrix of times, and a control device for minimizing the alignment error.

US Patent:

60798149, Jun 27, 2000

Filed:

Jun 27, 1997

Appl. No.:

8/883988

Inventors:

Meng H. Lean - Briarcliff Manor NY
Vittorio R. Castelli - Yorktown Heights NY
Joannes N. M. deJong - Suffern NY
Lloyd A. Williams - Mahopac NY

Assignee:

Xerox Corporation - Stamford CT

International Classification:

B41J 206

US Classification:

347 55

Abstract:

A droplet-on-demand ink jet printer uses electrostatic tacking of a recording medium, such as paper, to achieve simultaneously precise holding of an aligned recording medium on a dielectric surface of a transport belt, thereby providing precise motion quality of the recording medium relative to the printer's printhead, and improved ink droplet placement on the recording medium. The transport belt is electrostatically charged with a charge of one polarity, so that an electrostatic pressure is generated which precisely holds the recording medium in an aligned position on the transport belt, after it is fed thereon, and concurrently induces a charge of opposite polarity on the ink droplets ejected by the printhead, thereby accelerating the droplets toward the recording medium. The accelerated droplets reduce transverse forces on the droplets, such as transverse airflows, and placement errors caused by the repulsion of incoming droplets by previously printed images are further reduced by migration of the charges of the printed droplets through the recording medium and consequent charge cancellation, so that droplet placement is improved.