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:
Apr. 24, 2012
Filed:
Apr. 01, 2011
Takahiro Miyata, Chigasaki, JP;
Masao Murata, Chigasaki, JP;
Satoshi Shiba, Chigasaki, JP;
Mitsuru Yahagi, Chigasaki, JP;
Jyunpei Yuyama, Chigasaki, JP;
Takahiro Miyata, Chigasaki, JP;
Masao Murata, Chigasaki, JP;
Satoshi Shiba, Chigasaki, JP;
Mitsuru Yahagi, Chigasaki, JP;
Jyunpei Yuyama, Chigasaki, JP;
Ulvac, Inc., Chigasaki-shi, JP;
Abstract
The back pressure of an ink tank is controlled. A porous body is arranged inside the ink tank, the lower end of the porous body contacts an ink, and the ink ascends inside the porous body due to a capillary force. The upper end of the porous body is not immersed in the ink, and a maximum ascending force acts upon the ink stored in the ink tank. Therefore, the ink does not leak from a discharge head located lower than the ink tank. Further, because the ink is accumulated under the porous body and the amount of the ink contacting the porous body is small, components of the ink are less susceptible to deterioration.