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:
Mar. 12, 1991
Filed:
Feb. 21, 1989
C S Chan, Boise, ID (US);
Hewlett-Packard Company, Palo Alto, CA (US);
Abstract
An apparatus for rapidly coupling and decoupling a remote source of ink supply to a disposable ink jet pen filled with a porous ink storage material. This is accomplished without requiring an air-tight seal at the connection of ink into the pen, and is characterized by the use of a capillary tube which extends from the remote source of ink supply to the pen. The capillary tube has a needle mounted at one end thereof for easy penetration into and removal from the porous material within a storage compartment of the pen. The capillary action of the porous material acting on the needle is used draw ink by capillary action from the remote source of ink supply into the pen. This action allows the free liquid surface of the remote ink supply to be positioned below an ink ejection plane of the pen, thereby preventing ink from drooling from the pen during ink jet printing.