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. 10, 2006
Filed:
Nov. 11, 2003
Satoshi Shinada, Nagano, JP;
Hisashi Miyazawa, Nagano, JP;
Akira Ichihashi, Nagano, JP;
Seiko Epson Corporation, Tokyo, JP;
Abstract
An ink cartridge has an ink storage chamber, an ink supply port and a negative pressure generating mechanism which selectively blocks and opens fluid communication between the ink storage chamber and the ink supply port as a consequence of ink consumption. The negative pressure generating mechanism includes an elastic member having first and second surfaces and a sealing portion, the sealing portion having a through-hole, an ink flow path communicating with the ink supply port and having an opening portion at a position where the sealing portion of the elastic member contacts with and separates from the opening portion, the opening portion facing the through-hole, and a communicating portion facing the first surface of the elastic member and communicating with the ink storage chamber. A space portion faces the second surface of the elastic member and communicates with the ink supply port.