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:
Sep. 11, 2001
Filed:
Jan. 15, 1997
Eiichiro Shimizu, Urawa, JP;
Masami Ikeda, Yokohama, JP;
Naohito Asai, Yokohama, JP;
Tsutomu Abe, Isehara, JP;
Toshio Kashino, Chigasaki, JP;
Masahiko Higuma, Tohgane, JP;
Hitoshi Sugimoto, Yokohama, JP;
Hiroki Tajima, Kawasaki, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
An ink jet unit includes an ink jet head for ejecting ink; an ink cartridge for containing ink to be supplied to the ink jet head; an ink supply member for introducing the ink from the ink cartridge, provided in the ink jet head; a negative pressure generating material in the ink cartridge; an opening for permitting contact between the negative pressure generating material and in the ink supply member; wherein a gap is formed in the opening when the ink supply member is in contact with the negative pressure generating material.