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:
Jul. 30, 1996
Filed:
Sep. 07, 1994
Applicant:
Inventors:
Tofigh Khodapanah, San Diego, CA (US);
George T Kaplinsky, San Diego, CA (US);
Assignee:
Hewlett-Packard Company, Palo Alto, CA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B41J / ;
U.S. Cl.
CPC ...
347 87 ;
Abstract
An ink pressure regulator for use inside of a flexible ink bag reservoir for a replaceable or refillable ink cartridge comprises a bow spring (60) configured to have substantially linear force/deflection characteristics and a pair of plates (40, 50) which collapse to a substantially flat shape to minimize the amount of ink remaining after printing has depleted the ink from the cartridge. The regulator may be manufactured of one or aplurality of separate pieces.