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:
Oct. 28, 2025
Filed:
May. 09, 2023
Takashi Kinokuni, Tokyo, JP;
Ryuji Tsukamoto, Kanagawa, JP;
Takashi Kinokuni, Tokyo, JP;
Ryuji Tsukamoto, Kanagawa, JP;
RICOH COMPANY, LTD., Tokyo, JP;
Abstract
A drive controller includes circuitry. The circuitry generates multiple types of drive pulses to be applied to a driver of a liquid discharge head including a valve to open and close a discharge port, and applies the multiple types of drive pulses to the driver to cause the driver to move the valve to open and close the discharge port. Each of the multiple types of drive pulses causes the valve to move away from the discharge port at a valve-opening speed to open the discharge port, keep opening the discharge port for an open time, and move toward the discharge port at a valve-closing speed to close the discharge port. Further, the circuitry generates the multiple types of drive pulses, the open time and the valve-closing speed of which are different, and changes the valve-closing speed according to the open time.