David L Pereira

US Patent:

8100489, Jan 24, 2012

Filed:

Oct 17, 2008

Appl. No.:

12/253388

Inventors:

David H. Donovan - San Diego CA, US
Shilin Guo - San Diego CA, US
Behnam Baslani - San Diego CA, US
David Luis Pereira - San Diego CA, US

Assignee:

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

International Classification:

B41J 2/01
B41J 3/00

US Classification:

347 2, 347103

Abstract:

A method for double-sided printing may include ejecting printing fluid from a fluid ejector to a platen configured to receive print media, the platen supporting a nonabsorbent substrate. In any sequence, a first print media side and a second print media side may be printed by ejecting printing fluid from the fluid ejector to the first print media side, and contacting the second print media side with the nonabsorbent substrate to transfer printing fluid from the nonabsorbent substrate to the second print media side. A method for double-side printing may further include increasing the contact between the second print media side with the nonabsorbent substrate to increase transfer of printing fluid.

US Patent:

20090195581, Aug 6, 2009

Filed:

Oct 16, 2008

Appl. No.:

12/253133

Inventors:

Behnam Bastani - San Diego CA, US
David Luis Pereira - San Diego CA, US
Jose Ramos - San Diego CA, US

International Classification:

B41J 29/38
H04N 1/60

US Classification:

347 14, 358 19

Abstract:

Systems and methods for print head calibration. In an exemplary embodiment, the method may include scanning an image on a print media to obtain an optical density profile. The method may also include selecting at least one window in the optical density profile. The method may also include generating an average profile for each window. The method may also include identifying variations in uniformity.

US Patent:

20120297997, Nov 29, 2012

Filed:

May 25, 2011

Appl. No.:

13/115142

Inventors:

Michael Novick - San Diego CA, US
David Luis Pereira - San Diego CA, US
Geoffrey Schmid - San Diego CA, US

International Classification:

B41K 1/38
B41F 33/00

US Classification:

101327, 101483

Abstract:

Image forming apparatuses and methods are disclosed. Image forming apparatuses and methods include a plate member including an upper plate surface to receive media on which to form images, an ink absorber member to receive ink in a form of ink build-up, and a blotter unit to periodically contact and press at least a portion of the ink build-up formed on the ink absorber member therein.

US Patent:

20170339307, Nov 23, 2017

Filed:

Nov 26, 2014

Appl. No.:

15/520306

Inventors:

- Amstelveen, NL
Dror Kella - Nes Ziona, IL
David L. Pereira - San Diego CA, US

International Classification:

H04N 1/405
H04N 1/60

Abstract:

In an example implementation, a method of rosette-free printing includes, in a printing device whose color plane misregistration is less than 15 percent of a screen ruling of a halftone screen, printing multiple color planes of a multicolor image using the halftone screen.