Jeffrey K Hendricks

US Patent:

6350073, Feb 26, 2002

Filed:

Jul 12, 2000

Appl. No.:

09/615689

Inventors:

Gary Hays - Vancouver WA
John C Santon - Brush Prairie WA
Raymond C Sherman - Camas WA
William Watts - Vancouver WA
Jeffrey T Hendricks - Camas WA
Ivan F. Crespo - Vancouver WA

Assignee:

Hewlett-Packard Company - Palo Alto CA

International Classification:

B41J 1142

US Classification:

400582, 400624, 400626, 347104

Abstract:

A Z-fold print media handling system for printing banners and the like uses an inkjet printing mechanism without a tractor-feed. A series of stuttering stopping and starting steps generates varying static and dynamic frictional forces to separate the first sheet of a Z-fold stack from the remainder of the stack. Both conventional cut-sheet media and Z-fold media are fed using the same printing mechanism, which pulls the media toward a printzone through frictional engagement with a first surface of the media To prevent printhead crashes and smearing the image near the perforations joining the Z-fold sheets, the printhead to media spacing is increased for Z-fold media over the standard spacing used for cut-sheet media. A cam feature is incorporated into the media drive clutch disk to determine whether an operator has set a selector lever for cut-sheet or Z-fold printhead to media spacing.

US Patent:

6485383, Nov 26, 2002

Filed:

May 10, 2000

Appl. No.:

09/568442

Inventors:

Jeffrey T. Hendricks - Camas WA
Robert P. Callaway - Vancouver WA

Assignee:

Hewlett-Packard Company - Palo Alto CA

International Classification:

F16H 708

US Classification:

474101

Abstract:

A method and apparatus for maintaining a substantially constant belt tension under changing temperature conditions is provided by a geometric layout of a motor, belt and pulley system and a selection of manufacturing materials for component parts having a predetermined relationship of thermal expansion coefficients between themselves.

US Patent:

6494630, Dec 17, 2002

Filed:

Oct 31, 1999

Appl. No.:

09/431712

Inventors:

Kenneth R Williams - Vancouver WA
James P. Kearns - Corvallis OR
Jeffrey T Hendricks - Camas WA
Jose Antonio Alvarez - Madrid, ES
B Michael Eckard - Cariff CA

Assignee:

Hewlett-Packard Company - Palo ALto CA

International Classification:

B41J 160

US Classification:

400175, 347 20

Abstract:

A datum arrangement on the replaceable semi-permanent compact print cartridge includes three x-datums, one y-datum and two z-datums to assure proper seating of the print cartridge in the carriage as well as proper electric and fluidic interconnections.

US Patent:

6692102, Feb 17, 2004

Filed:

Jul 17, 2002

Appl. No.:

10/198291

Inventors:

Jeffrey T. Hendricks - Camas WA

Assignee:

Hewlett-Packard Development Company, LP - Houston TX

International Classification:

B41J 2300

US Classification:

347 37

Abstract:

The present invention involves a printing device having a frame which defines therein X, Y, and Z operative, orthogonal axes, plural-site, Z-axis datuming structure operatively interposed a printhead assembly and a carriage supporting that assembly within the device, the Z-axis datuming structure, comprising first and second datuming sites spaced generally in an X-axis direction, and a third datuming site spaced from both the first and second sites in a Y-axis direction, and from at least one of the first and second sites in an X-axis direction.

US Patent:

6755516, Jun 29, 2004

Filed:

May 16, 2002

Appl. No.:

10/147118

Inventors:

Lisa M. Hanson - Vancouver WA
Curt G. Gonzales - Corvallis OR
Dion C. Davidson - Salt Lake City UT
Charles R. Steinmetz - Corvallis OR
Scott D. Sturgeon - Vancouver WA
David C. Johnson - Portland OR
Jeffrey T. Hendricks - Camas WA

Assignee:

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

International Classification:

B41J 2175

US Classification:

347 86, 347 87, 347 49

Abstract:

The present disclosure relates to a replaceable ink container for providing ink to an inkjet printing system. The inkjet printing system has a receiving station for receiving the replaceable ink container. The replaceable ink container includes a handle extending from a trailing end of the ink container for grasping the ink container for insertion into the receiving station. Also included is a latch for securing the replaceable ink container to the receiving station. The latch has an extended position for engaging the receiving station for securing the ink container to the receiving station and a retracted position. The latch is so disposed and arranged on the ink container to be urged from the extended position to the retracted position as the handle is grasped.

US Patent:

6779869, Aug 24, 2004

Filed:

Jan 31, 2002

Appl. No.:

10/066065

Inventors:

Jeffrey T. Hendricks - Camas WA
Si-Lam Choy - Corvallis OR
Ronald A. Hellekson - Eugene OR
John M. Altendorf - Corvallis OR

Assignee:

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

International Classification:

B41J 2300

US Classification:

347 37

Abstract:

The present invention relates to a carriage for use in a printing device, the carriage including a carriage body with a bearing structure configured to support such carriage body for movement along a reference track. The carriage also includes a printhead anchored to the carriage body, and aligned directly relative to the carriage bearing structure.

US Patent:

6969148, Nov 29, 2005

Filed:

Jul 31, 2001

Appl. No.:

09/919701

Inventors:

Scott D. Sturgeon - Vancouver WA, US
Jeffrey T. Hendricks - Camas WA, US
David C. Johnson - Portland OR, US
Charles R. Steinmetz - Corvallis OR, US
Daniel W. Petersen - Philomath OR, US

Assignee:

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

International Classification:

B41J002/01

US Classification:

347 49

Abstract:

An on-axis ink reservoir that is pivotally secured to the carriage of an inkjet printer thereby defining an engaged position, in which the ink reservoir is in fluid communication with a printhead secured to the carriage, and an open position, in which the ink reservoir pivots away from the printhead to allow easy access to the printhead without the need to remove the ink reservoir from the carriage. Preferably, the ink reservoir is detachably secured to an ink-reservoir mounting portion, the printhead is detachably secured to a printhead mounting-portion, and these two mounting portions are pivotally secured together. More preferably, the ink-reservoir mounting portion includes a plurality of ink reservoirs, and the printhead mounting-portion includes a plurality of printheads. A latching mechanism is provided to operably secure the two mounting portions together in the engaged position.

US Patent:

8128195, Mar 6, 2012

Filed:

Jan 14, 2009

Appl. No.:

12/353380

Inventors:

Jeffrey T Hendricks - Camas WA, US
Gene D Jones - Yacolt WA, US

Assignee:

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

International Classification:

B41J 2/165

US Classification:

347 33, 347 42

Abstract:

Methods and means for wiping a page-wide print array are provided. An installable and removable cartridge includes a quantity of web material. The web material traverses a serpentine pathway and is driven by a motor such that fresh web material can be provided to a cleaning zone. The web material within the cleaning zone is wiped across the ink discharge surface of an array of printing dies to remove debris. Wiping action is performed perpendicular to a lengthwise aspect of the page-wide print array. Various embodiments of compact and effective cleaning mechanisms are thus provided in modular, replaceable forms.