Hector Luis Lebron, 51Hudson, MA

6460974, Oct 8, 2002

Jul 27, 2001

09/917571

Hector Lebron - San Diego CA

Hewlett-Packard Company - Palo-Alto CA

B41J 206

347 55

Among the embodiments of the micro-pump herein described, the first includes an array containing a plurality of conductive elements. A plate covers the array and a controller supplies and controls current to the conductive elements in the array. In this embodiment, the plate can be, and preferably is, a photopolymer. Moreover, if a photopolymer is used, it is preferable to use a thin-film photopolymer having a sub-millimeter thickness. The conductive elements can have a current individually and sequentially applied therethrough or shut-off thereto by the controller. In addition, the controller operates to temporarily apply current to substantially all of the conductive elements in the array thereby enabling a fluid disposed on the plate to be separated into positively and negatively charged fluid molecules. Following this separation, the controller applies a current sequentially through selective of the conductive elements and shuts-off current thereto in a predetermined order to define a fluid flow path. A fluid disposed on the plate and separated into positively and negatively charged molecules is forced to move along the fluid flow path by a moving electromagnetic field generated by the application of current and shutting-off of current to the selective of the conductive elements.

6890067, May 10, 2005

Jul 3, 2003

10/613471

Scott Hock - Poway CA, US
Hector Lebron - San Diego CA, US
Paul Crivelli - San Diego CA, US
Kenneth Diest - Corvallis OR, US

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

B41J002/45

347 71, 347 40

A fluid ejection assembly includes at least one inner layer having a fluid passage defined therein, and first and second outer layers positioned on opposite sides of the at least one inner layer. The first and second outer layers each have a side adjacent the at least one inner layer and include drop ejecting elements formed on the side and fluid pathways communicated with the drop ejecting elements. The fluid pathways of the first and second outer layers communicate with the fluid passage of the at least one inner layer, and the at least one inner layer and the fluid pathways of the first outer layer form a first row of nozzles, and the at least one inner layer and the fluid pathways of the second outer layer form a second row of nozzles.

7380914, Jun 3, 2008

Apr 26, 2005

11/114980

Hector Jose Lebron - San Diego CA, US
Paul Crivelli - San Diego CA, US
Scott W. Hock - Poway CA, US

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

B41J 2/05

347 56, 347 17, 347 18, 347 63, 347 64

A fluid ejection assembly includes a first layer, and a second layer positioned on a side of the first layer. The second layer has a side adjacent the side of the first layer and includes barriers defining a fluid chamber on the side, a drop ejecting element formed within the fluid chamber, and a thermal conduction path extended between the fluid chamber and the barriers.

7467858, Dec 23, 2008

Oct 12, 2005

11/248907

Hector J. Lebron - San Diego CA, US
Clayton L. Holstun - San Marcos CA, US
Dustin W. Blair - San Diego CA, US

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

B41J 2/175

347 85

A method of inkjet printing includes establishing a back pressure corresponding to a desired print mode in a printhead and changing the back pressure in response to changes in print mode. A printing system for printing in a number of distinct print modes includes an inkjet pen having a printhead and a back pressure control unit having multiple back pressure settings. The back pressure is set to a first value when the printing system is operating in a first print mode to a second value when the printing system is operating in a second print mode. In another embodiment, the printing system includes structure for controlling meniscus condition in the printhead nozzles by selectively changing back pressure.

7540593, Jun 2, 2009

Apr 26, 2005

11/114961

Scott W. Hock - Poway CA, US
Paul Crivelli - San Diego CA, US
Hector Jose Lebron - San Diego CA, US

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

B41J 2/05

347 65

A fluid ejection assembly includes a first layer, and a second layer positioned on a side of the first layer. The second layer has a side adjacent the side of the first layer and includes a drop ejecting element formed on the side and a fluid pathway communicated with the drop ejecting element. The first layer and the fluid pathway of the second layer form a nozzle, and the nozzle has a cross-shaped cross-section.

8356877, Jan 22, 2013

Aug 11, 2008

13/055739

Hector Jose Lebron - San Diego CA, US
Anders T. Peterson - Camas WA, US
Joshua Joel Cantrell - Hillsboro OR, US

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

B41J 29/393

347 19

The present invention is embodied in a printing system () that includes a print head () having a controller (), a temperature sensor () and a priming system () configured to apply a fluid pressure externally to the print head () to purge the print head with fluid, wherein purging the print head () with fluid has an effect of reducing the print head temperature. The controller () is configured to activate the priming system () for purging the printhead () with fluid, monitor a signal from the temperature sensor (), and determine () whether activating the primer has resulted in sufficient fluid passing through the print head () based upon monitoring the signal from the temperature sensor ().

2005020, Sep 22, 2005

May 9, 2005

11/124957

Rio Rivas - Corvallis OR, US
Paul Crivelli - San Diego CA, US
Tony Cruz-Uribe - Corvallis OR, US
Hector Lebron - San Diego CA, US

B41J002/135

347044000

A fluid ejection assembly includes at least one inner layer having a fluid passage defined therein, first and second outer layers positioned on opposite sides of the at least one inner layer, and an orifice plate provided along an edge of the first and second outer layers. The first and second outer layers each have a side adjacent the at least one inner layer and include drop ejecting elements formed on the side and fluid pathways communicated with the drop ejecting elements. As such, the fluid pathways of the first and second outer layers communicate with the fluid passage of the at least one inner layer. In addition, the orifice plate includes a first row of orifices communicated with the fluid pathways of the first outer layer and a second row of orifices communicated with the fluid pathways of the second outer layer.

2008019, Aug 21, 2008

Apr 24, 2008

12/109183

Hector Jose LEBRON - San Diego CA, US
Paul CRIVELLI - San Diego CA, US
Scott W. HOCK - Poway CA, US

G11B 5/127

216 27

A fluid ejection assembly includes a first layer, and a second layer positioned on a side of the first layer. The second layer has a side adjacent the side of the first layer and includes barriers defining a fluid chamber on the side, a drop ejecting element formed within the fluid chamber, and a thermal conduction path extended between the fluid chamber and the barriers.