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:
Jul. 18, 2006
Filed:
Mar. 22, 2004
Ryoji Inoue, Kanagawa, JP;
Ryoichi Matsumoto, Tokyo, JP;
Tatsuo Nanjo, Kanagawa, JP;
Hideki Ogura, Kanagawa, JP;
Ryoji Inoue, Kanagawa, JP;
Ryoichi Matsumoto, Tokyo, JP;
Tatsuo Nanjo, Kanagawa, JP;
Hideki Ogura, Kanagawa, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
A liquid container is provided which can prevent a leakage of liquid from an air introduction portion under any environment of use and storage and which can maintain a stable negative pressure characteristic irrespective of a degree of liquid consumption. The liquid container includes a liquid containing portion, a liquid supply portion to supply liquid from the liquid containing portion to a liquid using portion, a valve chamber having a one-way valve which permits a gas introduction into the liquid containing portion and prevents the liquid and gas from getting out of the liquid containing portion, a communication path to communicate the liquid containing portion with the valve chamber, a mechanism having a function of maintaining a volume of the liquid containing space, and a communication path closing member capable of enabling or disabling a communication between the liquid containing portion and the valve chamber through the communication path.