Julie Amanda Cox

US Patent:

7517056, Apr 14, 2009

Filed:

Feb 13, 2006

Appl. No.:

11/352678

Inventors:

Elizabeth A. Fellner - San Diego CA, US
James Pingel - San Diego CA, US
Matthew David Giere - San Diego CA, US
Satya Prakash - San Diego CA, US
David W Jenkins - San Diego CA, US
James A Feinn - San Diego CA, US
Arun K Agarwal - Corvallis OR, US
Julie J Cox - Corvallis OR, US
Jules G Moritz - Corvallis OR, US
Ozgur Yildirim - Corvallis OR, US

Assignee:

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

International Classification:

B41J 2/05

US Classification:

347 56, 347 65

Abstract:

A fluid ejection device includes a fluid chamber, a fluid restriction communicated with the fluid chamber, and a fluid channel communicated with the fluid restriction. The fluid restriction has a fluid restriction parameter defined as (2*W+2*H)*L/(H*W), wherein W is a width of the fluid restriction, H is a height of the fluid restriction, and L is a length of the fluid restriction. As such, the fluid restriction parameter is in a range of 1. 5 to 5. 75.