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. 25, 2018
Filed:
Jul. 24, 2017
Toshiba Tec Kabushiki Kaisha, Tokyo, JP;
Yoshiaki Kaneko, Mishima Shizuoka, JP;
Kazuhiro Hara, Numazu Shizuoka, JP;
Kazuhiko Ohtsu, Mishima Shizuoka, JP;
Taiki Goto, Mishima Shizuoka, JP;
Toshiba TEC Kabushiki Kaisha, Tokyo, JP;
Abstract
An ink circulation device for an ink jet head includes a first ink storage unit that stores ink to be supplied to an ink jet head, a second ink storage unit that stores ink to be returned from the ink jet head, a pump that operates according to an electric signal to transport the ink from the second ink storage unit to the first ink storage unit, a filter between the pump and the first ink storage unit, a first pressure sensor configured to detect an internal pressure of the first ink storage unit, a second pressure sensor configured to detect an internal pressure between the pump and the filter, and a drive circuit configured to generate the electric signal according to a pressure difference between the internal pressure detected by the second pressure sensor and the internal pressure detected by the first pressure sensor.