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. 20, 2026
Filed:
Dec. 05, 2024
Riso Technologies Corporation, Tokyo, JP;
Sota Harada, Mishima Shizuoka, JP;
RISO Technologies Corporation, Tokyo, JP;
Abstract
A liquid ejection head includes nozzles arranged in a first direction, pressure chambers respectively communicating with the nozzles, a volume of each chamber being varied to eject liquid through the nozzle, an actuator varying the volumes according to drive waveforms applied to the chambers, and a drive circuit generating a drive waveform for each chamber with a delay time to cause the liquid to be ejected with the delay time. The drive circuit determines the delay time to be a sum of: a first delay time for the particular chamber, the first delay time for all the chambers varying so as to have a triangular wave shape with respect to positions of the chambers, and a second delay time for the particular chamber, the second delay time for all the chambers varying so as to have a periodic wave shape with respect to the positions of the chambers.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile