Daniel J Fredrickson

US Patent:

6595619, Jul 22, 2003

Filed:

Oct 30, 2001

Appl. No.:

10/016564

Inventors:

John A. Barinaga - Portland OR
Daniel J. Fredrickson - Camas WA
Geoff M. Wotton - Battle Ground WA

Assignee:

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

International Classification:

B41J 2165

US Classification:

347 32, 347 42

Abstract:

A print unit, such as an inkjet printing mechanism, includes a printbar assembly that has print modules with one or more printheads that collectively span a print region corresponding to a width of a print media and deposit an imaging medium, such as ink, onto the print media. Wiper assemblies move from a print position to a service position in the print region to service the one or more printheads of the print modules. A wiper assembly has one or more wipers that correspond to the one or more printheads, such that when the wiper assembly and the print module are positioned in the service position, the wipers clean the printheads. The wiper assembly also has one or more printhead caps that cover the one or more printheads on the print modules.

US Patent:

6637858, Oct 28, 2003

Filed:

Oct 30, 2001

Appl. No.:

10/016466

Inventors:

Geoff M. Wotton - Battleground WA
John A. Barinaga - Portland OR
Daniel J. Fredrickson - Camas WA

Assignee:

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

International Classification:

B41J 2165

US Classification:

347 33, 347 42, 347 29

Abstract:

A print unit, such as an inkjet printing mechanism, includes a hinged printbar assembly that has print modules with one or more printheads to deposit an imaging medium, such as ink, onto a print media. The one or more printheads of the print modules collectively span a width of a print media when the hinged printbar assembly is in a print position. The hinged printbar assembly pivots about a hinge from the print position to a service position to provide service access to the one or more printheads of the print modules. The print unit also includes a wiper assembly having one or more wipers that correspond to the one or more printheads, such that when the wiper assembly and the print module are positioned in the service position, the wipers clean the printheads.

US Patent:

6669325, Dec 30, 2003

Filed:

May 8, 2002

Appl. No.:

10/142631

Inventors:

Daniel J. Fredrickson - Camas WA
Richard W. Seaver - Corvallis OR

Assignee:

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

International Classification:

B41J 2165

US Classification:

347 22, 347 34

Abstract:

Disclosed herein is a method of placing fluid droplets onto an object. The method includes moving a fluid ejection device in a first direction, reducing air flow between the fluid ejection device and the object with a member leading the fluid ejection device, and ejecting the fluid droplets onto the object.

US Patent:

6789875, Sep 14, 2004

Filed:

Jun 23, 2003

Appl. No.:

10/601787

Inventors:

Geoff M. Wotton - Battleground WA
John A. Barinaga - Portland OR
Daniel J. Fredrickson - Camas WA

Assignee:

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

International Classification:

B41J 2165

US Classification:

347 33, 347 32

Abstract:

In an implementation of printing mechanism hinged printbar assembly, a hinged printbar assembly pivots about a hinge between a print position and a service position. Print modules coupled to the hinged printbar assembly each have one or more printheads and the printheads of the print modules collectively span a width of a print media when the hinged printbar assembly is in the print position. A wiper assembly services the printheads on the hinged printbar assembly and includes printhead caps to cover the printheads on the hinged printbar assembly.

US Patent:

6981756, Jan 3, 2006

Filed:

Sep 30, 2003

Appl. No.:

10/675534

Inventors:

Daniel J. Fredrickson - Camas WA, US
Richard W Seaver - Corvallis OR, US

Assignee:

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

International Classification:

B41J 2/165

US Classification:

347 34, 347 32

Abstract:

An inkjet carriage for holding an inkjet pen includes an airflow reducing member configured and positioned to at least partially block airflow between an inkjet ejection nozzle of a pen on the carriage and an object to be printed upon during carriage movement.

US Patent:

7044582, May 16, 2006

Filed:

Mar 28, 2003

Appl. No.:

10/401924

Inventors:

Daniel J. Fredrickson - Camas WA, US
Antonio Gomez - Vancouver WA, US

Assignee:

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

International Classification:

B41J 23/00
B41J 2/165

US Classification:

347 37, 347 34

Abstract:

A printing device is provided which includes ink-dispensing structure which carries a printhead with a leading edge, and which moves in a printing sweep downstream across a printzone, a fairing structure, and a mounting structure which supports the fairing structure for movement with the printhead downstream from the leading edge of the printhead in a position configured to reduce aerodynamic turbulence associated with the leading edge of the printhead during movement of the printhead downstream across the printzone.

US Patent:

8556409, Oct 15, 2013

Filed:

Oct 18, 2010

Appl. No.:

12/906852

Inventors:

Russell P Yearout - Brush Prairie WA, US
Daniel Fredrickson - Portland OR, US

Assignee:

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

International Classification:

B41J 2/01
B41J 2/165
B41J 2/155

US Classification:

347104, 347 23, 347 42

Abstract:

Printers and duplexers are described herein. An example duplexer for a printer includes a print substrate path to guide a print substrate and a chamber to collect a fluid.

US Patent:

20050035991, Feb 17, 2005

Filed:

Aug 12, 2003

Appl. No.:

10/640661

Inventors:

Daniel Fredrickson - Portland OR, US

International Classification:

B41J002/165

US Classification:

347033000

Abstract:

An inkjet orifice plate cleaning system includes a first wiper configured to engage the inkjet orifice plate at a first speed and a second wiper configured to engage the inkjet orifice plate at a second speed, the first speed being different from the second speed.