The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 31, 2002
Filed:
Jun. 07, 2001
Applicant:
Inventors:
S. Dana Seccombe, Foster City, CA (US);
Charles R. Steinmetz, Corvallis, OR (US);
Assignee:
Hewlett-Packard Company, Palo Alto, CA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B41J 2/175 ;
U.S. Cl.
CPC ...
B41J 2/175 ;
Abstract
The present invention is a constant pressure ink supply for use in a printing system. The ink supply includes a flexible fluid reservoir for containing a quantity of fluid, and a spring which has an expanded position, and a contracted position. The spring is configured to operatively engage the flexible ink reservoir as the spring transitions from the expanded position to the contracted position and wherein the flexible fluid reservoir is biased by the spring as the spring contracts to produce fluid at a substantially constant fluid pressure at a fluid outlet.