David E Koehler

US Patent:

7300143, Nov 27, 2007

Filed:

Apr 5, 2005

Appl. No.:

11/099927

Inventors:

Steven R. Slotto - Camas WA, US
Brian E. Sonnichsen - Portland OR, US
Eric Segerstrom - Austin TX, US
David R. Koehler - Sherwood OR, US

Assignee:

Xerox Corporation - Stamford CT

International Classification:

B41J 2/175

US Classification:

347 86

Abstract:

A fluid reservoir apparatus including a housing having input ports in a rear portion of the housing and output ports in a front portion of the housing, fluidic chambers and fluidic channels extending from the input ports to the output ports, a heater structure disposed in the housing, a plurality of datum standoffs having rounded datum ends disposed at the rear portion of the housing.

US Patent:

7383774, Jun 10, 2008

Filed:

Mar 22, 2006

Appl. No.:

11/386345

Inventors:

David R. Koehler - Sherwood OR, US
Darren A. Hoke - Albuquerque NM, US
Louis S. Weichman - Albuquerque NM, US
George E. Vernon - Rio Rancho NM, US
Randy J. Shul - Albuquerque NM, US
Michael H. Beggans - Albuquerque NM, US

Assignee:

Sandia Corporation - Albuquerque NM

International Classification:

F42C 15/24

US Classification:

102249, 102231, 102222, 102226, 102235

Abstract:

A two-stage acceleration sensing apparatus is disclosed which has applications for use in a fuze assembly for a projected munition. The apparatus, which can be formed by bulk micromachining or LIGA, can sense acceleration components along two orthogonal directions to enable movement of a shuttle from an “as-fabricated” position to a final position and locking of the shuttle in the final position. With the shuttle moved to the final position, the apparatus can perform one or more functions including completing an explosive train or an electrical switch closure, or allowing a light beam to be transmitted through the device.

US Patent:

7455387, Nov 25, 2008

Filed:

Sep 30, 2005

Appl. No.:

11/239989

Inventors:

James Matthew Cunnington - Tualatin OR, US
David R. Koehler - Sherwood OR, US

International Classification:

B41J 2/165

US Classification:

347 36

Abstract:

A printhead is provided that includes a waste ink drip bib located adjacent to the lower edge of the printhead face and includes a funnel structure to direct the flow of waste ink to a centrally located lower opening.

US Patent:

7748830, Jul 6, 2010

Filed:

Nov 27, 2006

Appl. No.:

11/563294

Inventors:

David Paul Platt - Newberg OR, US
David Roland Koehler - Sherwood OR, US
Terrance L. Stephens - Molalla OR, US
James Dudley Padgett - Lake Oswego OR, US

Assignee:

Xerox Corporation - Norwalk CT

International Classification:

B41J 2/175

US Classification:

347 85, 347 87, 347 93

Abstract:

A printhead reservoir has an input ink port and a chamber to receive ink from an ink source through the input ink port. The reservoir also has a filter in a path between the input ink port and the chamber. A printhead includes a reservoir having an input ink port, a chamber to receive ink from an ink source through the input port and a filter in a path between the input port and the storage plate. The printhead also includes an array of jets to draw ink from the chamber and control circuitry to control the jets so as to selectively output ink through the jets onto a substrate. A reservoir has a filter to receive ink, a vented chamber to collect ink received from the filter and at least one jet to receive ink from the vented chamber. The vented chamber is between the ink filter and the fluid path to the jets in order to remove the filter portion of the pressure drop to the jets.

US Patent:

7901035, Mar 8, 2011

Filed:

Feb 27, 2009

Appl. No.:

12/394368

Inventors:

David Roland Koehler - Sherwood OR, US
Edward Charles Grenier - Portland OR, US
Gerard Rousseau - Portland OR, US
Garry Adam Jones - Sherwood OR, US
Michael Edward Norkitis - Newberg OR, US
James Matthew Cunnington - Tualatin OR, US
Hattie Raeann Hiatt - Buhl ID, US

Assignee:

Xerox Corporation - Norwalk CT

International Classification:

B41J 2/165

US Classification:

347 36, 347 35

Abstract:

A drip bib for use with a printhead of an imaging device includes a plate having an upper surface having an upper edge, an intermediate surface angled with respect to the upper surface, and a lower edge. The intermediate surface includes a plurality of fastener openings. The lower edge includes a drip point projecting from the lower edge with remaining portions of the lower edge being upturned and angled downwardly from at least one end of the lower edge toward the drip point. A plurality of protrusions protrudes from a back side of the upper surface. The protrusions in the plurality of protrusions are spaced from each other and proximate the upper edge.

US Patent:

8079691, Dec 20, 2011

Filed:

Feb 9, 2009

Appl. No.:

12/367583

Inventors:

David Roland Koehler - Sherwood OR, US
David Paul Platt - Newberg OR, US
Edward F. Burress - West Linn OR, US

Assignee:

Xerox Corporation - Norwalk CT

International Classification:

B41J 2/175
B41J 2/17
G01D 11/00

US Classification:

347 88, 347 99, 347 84, 347 85

Abstract:

A reservoir assembly for use in an imaging device, the reservoir assembly includes an ink input port configured to receive liquid ink from an ink source and an ink tank configured to receive ink from the input port. A filter is positioned between the input port and the ink tank configured to filter ink received via the input port prior to reaching the ink tank. The reservoir assembly includes a foam reducing path configured to guide ink that passes through the filter to the ink tank, the foam reducing path having a varying cross-sectional size and/or shape configured to collapse, compress, stretch, and/or shear air bubbles in foam that passes through the filter prior to reaching the ink tank.

US Patent:

8083333, Dec 27, 2011

Filed:

Nov 17, 2008

Appl. No.:

12/271998

Inventors:

Chad David Freitag - Portland OR, US
David Roland Koehler - Sherwood OR, US
Edward Charles Grenier - Portland OR, US

Assignee:

Xerox Corporation - Norwalk CT

International Classification:

B41J 2/175

US Classification:

347 85

Abstract:

An ink umbilical interface facilitates removal of the umbilical from a printhead while better preserving the integrity of the interface seal. The ink umbilical interface includes an ink umbilical connector having a plurality of conduits terminating within the connector and a tapered nozzle extending from each conduit in the plurality of conduits, each conduit communicating with a liquid ink reservoir, a backplate of a printhead having a plurality of openings, each opening being positioned to receive one of the tapered nozzles extending from the ink umbilical connector, and at least one sealing member positioned between the backplate and the ink umbilical connector, the sealing member having at least one opening to align with one of the backplate openings and receive one of the tapered nozzles.

US Patent:

8550612, Oct 8, 2013

Filed:

Oct 20, 2010

Appl. No.:

12/908165

Inventors:

Daniel Clark Park - West Linn OR, US
Isaac S. Frazier - Portland OR, US
David P. Platt - Newberg OR, US
David R. Koehler - Sherwood OR, US

Assignee:

Xerox Corporation - Norwalk CT

International Classification:

B41J 2/18
B41J 2/185
B41J 2/175

US Classification:

347 89, 347 85, 347 90

Abstract:

An inkjet printing apparatus is provided with a one-way valve to enable a single conduit to supply ink to an ink reservoir and withdraw purged ink from a receptacle into the ink reservoir. A bi-directional pump is operated in both directions in an alternating manner to withdraw ink from the receptacle when supplying the ink reservoir with ink.