Steven Lisle Walker

US Patent:

6386669, May 14, 2002

Filed:

Sep 29, 2000

Appl. No.:

09/676100

Inventors:

Stuart A. Scofield - Battle Ground WA
Steven H. Walker - Camas WA

Assignee:

Hewlett-Packard Company - Palo Alto CA

International Classification:

B41J 2938

US Classification:

347 14, 347105

Abstract:

A system of classifying incoming media entering an inkjet printing mechanism identifies the media without requiring any special manufacturer markings. The media is first optically scanned using a blue-violet light at an initial intensity to obtain both diffuse and specular reflectance data. If useable, the data is compared with known values for different types of media to classify the media so an optimum printmode tailored for the particular media type is used. If the initial data is unusable, successive scanning passes are preformed to find useable diffuse data, and if found, then to find useable specular data. During these successive passes, following an initial calibration scan for the media, each successive scan reduces the scanner intensity until reaching a minimum intensity. If upon reaching the minimum intensity, no useable data has been found, then a default printmode is selected. A printing mechanism constructed to implement this method is also provided.

US Patent:

6685313, Feb 3, 2004

Filed:

Oct 31, 2001

Appl. No.:

10/000735

Inventors:

Stuart A. Scofield - Battle Ground WA
Steven H. Walker - Camas WA

Assignee:

Hewlett-Packard Development Company, L.P. - Houston TX

International Classification:

G01N 21958

US Classification:

347105, 347 19, 25055901, 25055911

Abstract:

A system of classifying incoming media entering an inkjet printing mechanism identifies transparency media without requiring any special manufacturer markings. The media is first optically scanned using a blue-violet light at an initial intensity to obtain both diffuse and specular reflectance data. If useable, the data is compared with known values to classify the media so an optimum print mode tailored for the particular media is used. The early transparency detection system avoids time-consuming further steps trying to classify the media as photo media, plain paper, and the like, and facilitates fast printing of transparencies, which can be critical in the business environment when making last minute changes for a presentation. A printing mechanism constructed to implement this method is also provided.

US Patent:

6994432, Feb 7, 2006

Filed:

Sep 4, 2003

Appl. No.:

10/654704

Inventors:

Stuart A. Scofield - Battle Ground WA, US
Steven H. Walker - Camas WA, US

Assignee:

Hewlett-Packard Development Company, L.P. - Houston TX

International Classification:

G01N 21/86

US Classification:

347105, 347 19, 25055901, 2505592, 2505594, 25055911, 25055919

Abstract:

A system of classifying incoming media entering an inkjet printing mechanism identifies transparency media without requiring any special manufacturer markings. The media is first optically scanned using a blue-violet light at an initial intensity to obtain both diffuse and specular reflectance data. If useable, the data is compared with known values to classify the media so an optimum print mode tailored for the particular media is used. The early transparency detection system avoids time-consuming further steps trying to classify the media as photo media, plain paper, and the like, and facilitates fast printing of transparencies, which can be critical in the business environment when making last minute changes for a presentation. A printing mechanism constructed to implement this method is also provided.

US Patent:

7697256, Apr 13, 2010

Filed:

Apr 12, 2007

Appl. No.:

11/734477

Inventors:

Steven H. Walker - Vancouver WA, US
Bradley B. Branham - Vancouver WA, US
Bryan E. Robertson - Vancouver WA, US
Suk Wong - Vancouver WA, US
Kathleen Wettstein Harter - Vancouver WA, US

Assignee:

Hewlett-Packard Development Company, L.P. - Houston TX

International Classification:

B05B 5/053

US Classification:

361226

Abstract:

Embodiments of a system and method for directing aerosol are disclosed.

US Patent:

8057115, Nov 15, 2011

Filed:

Jul 28, 2006

Appl. No.:

11/494957

Inventors:

Stuart A. Scofield - Battleground WA, US
Jeffrey G. Castleberry - Underwood WA, US
Steven H. Walker - Camas WA, US

Assignee:

Hewlett-Packard Development Company, L.P. - Houston TX

International Classification:

B41J 33/00

US Classification:

400 48, 101 37

Abstract:

A system having a disc carrier determines a location of the disc carrier based upon first and second specular signals from an optical sensing element, the first specular signal occurring when the incident light is not received within the opening and impinges a first portion of the optical sensing element and the second specular signal occurring when the incident light is received within the opening and impinges a second portion of the optical sensing element.

US Patent:

8259367, Sep 4, 2012

Filed:

Oct 3, 2008

Appl. No.:

12/245359

Inventors:

Howard G. Wong - Portland OR, US
Bruce A. Axten - Camas WA, US
Steven H. Walker - Camas WA, US

Assignee:

Hewlett-Packard Development Company, L.P. - Houston TX

International Classification:

H04N 1/04

US Classification:

358498, 358474, 358496, 358497, 399374, 271227, 271 314

Abstract:

A method and apparatus align an adjuster with an edge of media supported by a tray. The adjuster is operably coupled to a gauge that moves in response to movement of the adjuster. A sensor senses the gauge to detect a dimension of the media while the media is supported by the tray.

US Patent:

D672128, Dec 11, 2012

Filed:

Feb 22, 2012

Appl. No.:

29/413867

Inventors:

Frederick J. Dojan - Vancouver WA, US
Steven H. Walker - Camas WA, US

Assignee:

NIKE, Inc. - Beaverton OR

International Classification:

0299

US Classification:

D 2961, D2946

US Patent:

8376506, Feb 19, 2013

Filed:

Jul 29, 2009

Appl. No.:

12/511583

Inventors:

Matthew A Shepherd - Vancouver WA, US
Alexander Govyadinov - Corvallis OR, US
Erick B Kinas - Camas WA, US
Paul Richards - Corvallis OR, US
Tom Deskins - Albany OR, US
Steven H Walker - Camas WA, US

Assignee:

Hewlett-Packard Development Company, L.P. - Houston TX

International Classification:

B41J 2/165

US Classification:

347 23, 347 19

Abstract:

In one embodiment, a drop detection method includes: moving a light source along a first side of the drop zone to illuminate drops passing through a drop zone; and, without blocking any part of the drop zone, detecting light scattered off the drops as the drops pass through the drop zone. In another embodiment, a drop detector includes: a light source on a first side of the drop zone for illuminating drops passing through a drop zone; a light detector on the first side of the drop zone near the light source and a movable carriage carrying the light source and the light detector. The light detector is exposed to the drop zone for detecting light scattered off drops as the drops pass through the drop zone. The carriage is movable along the first side of the drop zone in a direction transverse to the drop direction.