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. 25, 2011
Filed:
Nov. 16, 2005
Noritaka Ota, Ibaraki, JP;
Yuichi Takahashi, Ibaraki, JP;
Daisuke Nakamura, Ibaraki, JP;
Takeshi Miura, Ibaraki, JP;
Kazuo Haida, Ibaraki, JP;
Noritaka Ota, Ibaraki, JP;
Yuichi Takahashi, Ibaraki, JP;
Daisuke Nakamura, Ibaraki, JP;
Takeshi Miura, Ibaraki, JP;
Kazuo Haida, Ibaraki, JP;
Canon Finetech Inc., Ibaraki, JP;
Abstract
An ink-feeding device is provided in which the pressure applied to the ink in the printing head can be adjusted arbitrarily irrespective of the relative positions of the ink container and the printing head. Inside the sub-tank, a pressure-adjusting pumpis installed for applying a suitable pressure to many nozzlesKn of the printing headK. This pressure-adjusting pumpis placed a little above the bottom face of the sub-tankat a prescribed distance from the bottom face. Thereby the pressure-adjusting pumpis immersed in the ink held in the sub-tank. A drive unitfor driving the pressure-adjusting pumpis placed above the sub-tank. On the upper wall of the sub-tank, an air-vent valveis fixed to bring the inside pressure in the sub-tankto an atmospheric pressure. The inside pressure in the sub-tankis made equal to the atmospheric pressure by opening the air-vent valve