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:
Aug. 13, 2019
Filed:
Jan. 22, 2018
Toshiba Tec Kabushiki Kaisha, Tokyo, JP;
Kazuhiro Hara, Numazu Shizuoka, JP;
Toshiba TEC Kabushiki Kaisha, Tokyo, JP;
Abstract
A liquid circulator includes an upstream tank having a first pressure sensor, an intermediate tank, a downstream tank having a second pressure sensor, a circulation route for circulating liquid through an liquid ejecting head, the downstream tank, the intermediate tank, and the upstream tank, a first pump on the circulation route between the intermediate tank and the upstream tank, a second pump on the circulation route between the downstream tank and the intermediate tank, a first drive circuit configured to apply a first driving pulse to the first pump, a second drive circuit configured to apply a second driving pulse to the second pump, a controlling unit configured to calculate a pressure fluctuation value of the circulation route based on pressure values measured by the first and second pressure sensors, and adjust a phase difference between the first and second driving pulses as to minimize the pressure fluctuation value.