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:
Dec. 19, 2006
Filed:
Feb. 21, 2002
Takeshi Kono, Kanagawa, JP;
Mitsuru Kurata, Kanagawa, JP;
Akihiro Yamanaka, Kanagawa, JP;
Takeaki Shima, Kanagawa, JP;
Tetsuto Kageyama, Kanagawa, JP;
Itaru Watanabe, Kanagawa, JP;
Hiroki Tajima, Kanagawa, JP;
Toshihiro Sasaki, Kanagawa, JP;
Takeshi Kono, Kanagawa, JP;
Mitsuru Kurata, Kanagawa, JP;
Akihiro Yamanaka, Kanagawa, JP;
Takeaki Shima, Kanagawa, JP;
Tetsuto Kageyama, Kanagawa, JP;
Itaru Watanabe, Kanagawa, JP;
Hiroki Tajima, Kanagawa, JP;
Toshihiro Sasaki, Kanagawa, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
An ink jet recording apparatus comprises a recording head including a discharge port for discharging ink, a first liquid chamber at the upstream side in the direction of ink flow toward the discharge port, and a second liquid chamber at the downstream side, an ink tank for containing ink to be supplied to the recording head, an ink supply tube for causing the ink tank to communicate with the recording head, a shut-off valve provided in the ink supply tube and opening or closing the ink supply tube, a cap for covering the discharge port; and a suction pump for forcedly discharging the ink in the recording head from the discharge port when the cap covers the discharge port. The shut-off valve is opened when the first and second liquid chambers are reduced to respectively desired pressures by the suction pump in a state where the cap covers the discharge port and the shut-off valve is closed, whereby the ink in the ink tank is supplied through the ink supply tube to the first and second liquid chambers.