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. 21, 1999
Filed:
May. 31, 1995
Jaime H Bohorquez, Escondido, CA (US);
Kenneth J Courian, San Diego, CA (US);
James E Clark, Albany, OR (US);
Tofigh Khodapanah, San Diego, CA (US);
George T Kaplinsky, San Diego, CA (US);
David W Swanson, Escondido, CA (US);
Mindy A Hamlin, San Diego, CA (US);
James G Salter, San Diego, CA (US);
Hewlett-Packard Co., Palo Alto, CA (US);
Abstract
An ink-jet swath printer employing a cartridge with a spring bag primary reservoir and an auxiliary ink reservoir interconnected via a tube to form a closed ink replenishment system. The primary reservoir creates a negative pressure which draws ink from the auxiliary reservoir as ink is expelled from the cartridge printhead during printing operations. The auxiliary reservoir can either be mounted on the cartridge carriage or on the printer body. The auxiliary reservoir is a large capacity collapsible bag mounted below the level of the printhead to establish an ink pressure head at the primary reservoir connection which is not so large as to destroy or diminish the negative pressure and allow ink to drool from the printhead, yet is sufficient to permit replenishment of the primary reservoir to avoid printhead ink starvation.