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. 10, 2004
Filed:
Aug. 13, 2001
Masahiko Higuma, Tohgane, JP;
Masami Ikeda, Yokohama, JP;
Naohito Asai, Yokohama, JP;
Tsutomu Abe, Isehara, JP;
Toshio Kashino, Chigasaki, JP;
Seiichiro Karita, Yokohama, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
An ink jet cartridge includes a first chamber for accommodating a negative pressure producing material and provided with air communication part for communication with ambient air, wherein a part of the negative pressure producing material does not contain ink adjacent the air communication part; a second chamber which is substantially closed except for a fine communication part for communication with the first chamber at a position away from the air communication part, wherein the second chamber directly accommodates the ink to be supplied to the first chamber.