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. 19, 2004
Filed:
Feb. 06, 2002
Akihiro Yamanaka, Kanagawa, JP;
Mitsuru Kurata, Kanagawa, JP;
Yutaka Koizumi, Kanagawa, JP;
Hiroyuki Maeda, Kanagawa, JP;
Takeaki Shima, Kanagawa, JP;
Akira Goto, Kanagawa, JP;
Takeshi Kono, Kanagawa, JP;
Tetsuto Kageyama, Kanagawa, JP;
Itaru Watanabe, Kanagawa, JP;
Hiroki Tajima, Kanagawa, JP;
Yasushi Iijima, Tokyo, JP;
Toshihiro Sasaki, Kanagawa, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
The invention prevents drawbacks resulting from the bubble generated at the downstream side of the filter, while minimizing the waste in the ink. The recording head has a sub tank for storing ink supplied from the exterior, and a liquid chamber storing the ink supplied from the sub tank and supplying ink directly to a nozzle for ink discharge. A filter is provided between the sub tank and the liquid chamber. The liquid chamber holds ink of a predetermined amount in such a manner that the ink therein is separated by gas between the filter and the liquid chamber.