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:
May. 26, 2020
Filed:
Jan. 14, 2019
Toshiba Tec Kabushiki Kaisha, Shinagawa-ku, Tokyo, JP;
Taiki Goto, Mishima Shizuoka, JP;
Kazuhiro Hara, Numazu Shizuoka, JP;
TOSHIBA TEC KABUSHIKI KAISHA, Tokyo, JP;
Abstract
A liquid circulation device comprises a booster pump that draws liquid from a liquid replenishing tank to supply it to a liquid discharge head; a pressure reducing pump that collects the liquid from the liquid discharge head to supply it to the liquid replenishing tank; a buffer tank connected between the liquid discharge head and the booster pump and between the liquid discharge head and the pressure reducing pump, and into which the liquid flows; a pressure sensor that detects pressure in the buffer tank; and a processor that controls driving voltages of the booster pump and the pressure reducing pump based on a nozzle surface pressure of the liquid discharge head calculated based on pressure data detected by the pressure sensor, and determines whether the liquid is deficient based on the nozzle surface pressure, the driving voltages of the booster pump and the pressure reducing pump.