David S Vejtasa from 16126 Country Day Rd, Poway, CA 92064, age 53, Phone: 8587161338

Us Patents

System And Method For Extracting Carrier Liquid
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US Patent:

6748189, Jun 8, 2004
Filed:

Oct 11, 2002
Appl. No.:

10/269469
Inventors:

David S. Vejtasa - Springfield MO
Christopher A. Schantz - Redwood City CA
Assignee:

Hewlett-Packard Development Company, L.P. - Houston TX
International Classification:

G03G 1510
US Classification:

399250, 399251
Abstract:

A system and method for extracting carrier liquid utilizes thermal energy generated above a surface from which the carrier liquid is being extracted. The thermal energy can be generated by a heating element positioned over the surface. The thermal energy is used to evaporate the carrier liquid on the surface so that the evaporated carrier liquid can be condensed for collection.

Hard Imaging Device Charging Systems, Electrophotography Charging Systems, Hard Imaging Apparatuses, And Hard Imaging Device Electrophotography Charging Methods
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US Patent:

7035572, Apr 25, 2006
Filed:

Oct 31, 2003
Appl. No.:

10/700963
Inventors:

David S. Vejtasa - Springfield MO, US
Omer Gila - Cupertino CA, US
Gregory Ellis - Vancouver WA, US
Thomas Camis - Boise ID, US
Peter Gysling - New Plymouth ID, US
Assignee:

Hewlett-Packard Development Company, L.P. - Houston TX
International Classification:

G03G 15/02
US Classification:

399176, 399159
Abstract:

Aspects of the invention relate to hard imaging device charging systems, liquid electrophotography charging systems, hard imaging apparatuses, and hard imaging device electrophotography charging methods. In one embodiment, a hard imaging device charging system is described. The charging system may include a first charging device configured to charge a respective first region of a cylindrical image bearing member used to form latent images during hard imaging operations of the hard imaging device. The charging system may also include a second charging device configured to charge a respective second region of the cylindrical image bearing member used to form latent images during hard imaging operations of the hard imaging device. The first and second regions may have different radii from a central axis of the cylindrical image bearing member.

Hard Imaging Apparatus Charging Devices And Hard Imaging Device Charging Methods
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US Patent:

7050742, May 23, 2006
Filed:

Oct 31, 2003
Appl. No.:

10/700968
Inventors:

Omer Gila - Cupertino CA, US
David S. Vejtasa - Springfield MO, US
Michael H. Lee - San Jose CA, US
Thomas Camis - Boise ID, US
Peter Gysling - New Plymouth ID, US
Assignee:

Hewlett-Packard Development Company, L.P. - Houston TX
International Classification:

G03G 15/02
US Classification:

399168, 399159
Abstract:

Aspects of the invention relate to hard imaging apparatus charging devices, imaging assemblies, imaging assemblies charging methods, and hard imaging device image bearing member charging methods. In one aspect, a hard imaging apparatus charging device is disclosed. The charging device includes first and second end members, and an intermediate member connecting the first and second end members. The intermediate member may have a length corresponding to an imaging area of the image bearing member of the hard imaging apparatus. The intermediate member may be configured to charge the imaging area used to form latent images on the image bearing member during hard imaging operations of the hard imaging apparatus. The first and second end members of the charging device may be configured to maintain a predetermined spaced charging clearance between the intermediate member and the imaging area of the image bearing member. The first and second end members and the intermediate member of the charging device include a monolithic layer.

Hybrid Electro-Photographic/Ink-Jet Press Print Systems And Primers
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US Patent:

7796145, Sep 14, 2010
Filed:

Apr 11, 2007
Appl. No.:

11/786408
Inventors:

Yaacov Almog - Nes Ziona, IL
Ehud Chatow - Palo Alto CA, US
Clayton L. Holstun - San Marcos CA, US
Christian Schmid - Rancho Bernardo CA, US
Sergio Brandriss - Rehovot, IL
Ronald A. Askeland - San Diego CA, US
David S. Vejtasa - San Diego CA, US
Assignee:

Hewlett-Packard Development Company, L.P. - Houston TX
International Classification:

B41J 2/435
US Classification:

347111
Abstract:

Electro-photographic press print systems, methods of disposing a fluid onto a substrate in an electro-photographic press print system, and electro-photographic ink primers, are disclosed.

Methods, Apparatus And Articles Of Manufacture To Control Gloss Quality
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US Patent:

8267498, Sep 18, 2012
Filed:

Jun 1, 2010
Appl. No.:

12/791648
Inventors:

Dustin W. Blair - Escondido CA, US
Brian E. Curcio - San Diego CA, US
David S. Vejtasa - Rancho Bernardo CA, US
Glenn Thomas Haddick - San Diego CA, US
Assignee:

Hewlett-Packard Development Company, L.P. - Houston TX
International Classification:

B41J 29/38
US Classification:

347 19
Abstract:

Example methods, apparatus and articles of manufacture to control gloss quality in printed images are disclosed. A disclosed example apparatus includes a print engine to print a plurality of images for respective ones of a plurality of colors, each image representing a plurality of different print parameter combinations, a scan module to measure a first plurality of light reflectances for respective ones of the plurality of images and the print parameter combinations, and a calibrator to calibrate an operation of the print engine for respective ones of the plurality of colors based on the first plurality of measured light reflectances, the operations of the print engine including at least one of an order of ink application, a rate of ink application, a density of ink application, or an applied amount of gloss enhancer.

Method And Apparatus For Printing Fluid On A Substrate
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US Patent:

8322824, Dec 4, 2012
Filed:

Apr 30, 2007
Appl. No.:

12/597002
Inventors:

Eyal Peleg - Zoran, IL
Benji Ruhm - Tel-Aviv, IL
Thomas M Sabo - San Diego CA, US
Clayton L Holstun - San Marcos CA, US
Ronald A Askeland - San Diego CA, US
Ran Vilk - Qiryat Ono, IL
David Vejtasa - Rancho Bernardo CA, US
Omer Markovsky - Nez-Ziona, IL
Assignee:

Hewlett-Packard Development Company, L. P. - Houston TX
International Classification:

B41J 2/04
US Classification:

347 54
Abstract:

A method and apparatus for printing fluid on a substrate is provided. The method includes providing drops of the fluid on the substrate and spreading the drops of fluid to increase the surface area covered by those drops. The apparatus includes a printer having a print head for printing drops of fluid on the substrate and a spreader for spreading the fluid drops on the substrate.

Printing System
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US Patent:

8465118, Jun 18, 2013
Filed:

Jun 14, 2010
Appl. No.:

12/815386
Inventors:

Ali Emamjomeh - San Diego CA, US
George Sarkisian - San Diego CA, US
Blair A. Butler - San Diego CA, US
Elizabeth Ann Visnyak - San Diego CA, US
Sean W. Dobbins - San Diego CA, US
David S. Vejtasa - Rancho Bernardo CA, US
Assignee:

Hewlett-Packard Development Company, L.P. - Houston TX
International Classification:

B41J 2/01
US Classification:

347 16, 347 14, 347 96, 347100
Abstract:

A printing system and method form one or more pretreatment compositions on a medium. The one or more pretreatment compositions are selected based upon a parameter of the medium.

Developer Unit And Method Thereof
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US Patent:

8626038, Jan 7, 2014
Filed:

Jun 8, 2009
Appl. No.:

13/259598
Inventors:

Eric Nelson - San Diego CA, US
David Vejtasa - Poway CA, US
Alexander Karp - San Diego CA, US
Christopher S Tanner - San Diego CA, US
Assignee:

Hewlett-Packard Development Company, L. P. - Houston TX
International Classification:

G03G 15/095
G03G 13/095
US Classification:

399264
Abstract:

A developer unit usable with a liquid electrophotographic printing apparatus having a photosensitive drum includes a developer roller configured to receive ink, and to selectively engage and rotatably transfer the ink to the photosensitive drum, the developer roller configured to switch between a contact mode when the developer roller is rotating and a non-contact mode when the developer roller is not rotating, a squeegee roller selectively in contact with the developer roller, the squeegee roller configured to at least condense the received ink on the developer roller in the contact mode, and configured to be apart from the developer roller in the non-contact mode, and a cleaner roller selectively in contact with the developer roller, the cleaner roller configured to remove remaining ink from the developer roller not transferred to the photosensitive drum in the contact mode, and to be apart from the developer roller in the non-contact mode, wherein at least one of the squeegee roller, the cleaner roller and the developer roller are configured to move between the contact mode and the non-contact mode in response to a rotational state of the developer roller.

Resumes

Senior Systems Solutions Engineer At Hewlett-Packard Systems Solutions Engineer At Hewlett-Packard - Hp Indigo System Solutions Engineer At Hewlett-Packard See Less...

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Location:

Greater San Diego Area

Industry:

Printing

Experience:

Hewlett-Packard (Public Company; HPQ; Information Technology and Services industry): Senior Systems Solutions Engineer, (January 2006-Present) Hewlett-Packard - HP Indigo (Printing industry): Systems Solutions Engineer, (2006-Present) Hewlett-Pac...