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:
Jan. 01, 2008
Filed:
Jun. 07, 2005
Yoshinori Kojima, Kawasaki, JP;
Hajime Yamamoto, Fuchu, JP;
Yoshinori Kojima, Kawasaki, JP;
Hajime Yamamoto, Fuchu, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
An ink cartridge in which a space inside the ink cartridge is divided by a cylindrical bulkhead into two parts, a negative pressure generator chamber located inside the bulkhead and a liquid chamber located outside the bulkhead. The negative pressure generator chamber communicates with the atmosphere via an air intake port, communicates with an ink supply port, and contains a negative pressure generator. The liquid chamber contains liquid ink directly. The negative pressure generator chamber and the liquid chamber communicate with each other only via a communicating portion provided in the bulkhead. The entire peripheral surface of the lower portion of the negative pressure generator is in contact with the ink in the liquid chamber through the communicating portion continuously provided in the bulkhead.