US Patent Issued to RISO Technologies on Sept. 15 for "Liquid ejection head" (Japanese Inventor)

ALEXANDRIA, Va., Sept. 15 -- United States Patent no. 12,734,803, issued on Sept. 15, was assigned to RISO Technologies Corp. (Tokyo).

"Liquid ejection head" was invented by Tsubasa Konishi (Sunto Shizuoka, Japan).

According to the abstract* released by the U.S. Patent & Trademark Office: "According to one embodiment, a liquid ejection head includes an actuator with a plurality of pressure chambers spaced from each other in a first direction. Each pressure chamber extends lengthwise in a second direction intersecting the first direction. An anti-reflection film is on an inner surface of the pressure chambers. A diaphragm portion is at an end of each pressure chamber. The diaphragm portion provides a flow cross-section that is less than th...