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:
Feb. 05, 2002
Filed:
Feb. 04, 1994
Applicant:
Inventor:
Bruce Cowger, Corvallis, OR (US);
Assignee:
Hewlett-Packard Company, Palo Alto, CA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B41J 2/18 ;
U.S. Cl.
CPC ...
B41J 2/18 ;
Abstract
The print heads of ink-jet pens are supplied with ink that is circulated to and from the print head. Passageways defined by the pen are oriented in fluid communication with the firing chambers of the print head and so that ink circulates in the vicinity of the chambers irrespective of whether the print head is activated for ejecting ink drops.