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:
Oct. 21, 1997
Filed:
Nov. 29, 1994
Dana D Miller, Corvallis, OR (US);
John Dion, Corvallis, OR (US);
Ruben Oscar Ortiz, Corvallis, OR (US);
Hewlett-Packard Company, Palo Alto, CA (US);
Abstract
A refill system for ink cartridges. A refill unit is provided which includes a housing having a foam portion impregnated with ink. The foam portion includes a lower section extending outwardly from a lower panel. Positioned within the panel is an annular channel surrounding the lower section. The refill unit is positioned within an empty ink cartridge modified to include an annular seal member therein. The refill unit is inserted so that the channel receives the seal member. Upon insertion of the refill unit, the lower section of the foam member is engaged against an ink filter within the cartridge. Alternatively, the refill unit may include an enlarged lower section associated with the foam portion, with the annular channel being absent. This unit is used in cartridges which do not have the seal member. The enlarged lower section firmly engages the entire ink filter within the cartridge.