LIQUID DISCHARGE HEAD AND WATER DISCHARGE METHOD Russian patent published in 2018 - IPC B41J2/00 

FIELD: technological processes.

SUBSTANCE: liquid ejection head includes the following: the substrate, where the recording element is located; and the ejection nozzle forming part, where the ejection nozzle is formed, which faces the recording element and is designed with the possibility to discharge liquid. Liquid discharge head has the pressure chamber, the first liquid passage, which is designed with the possibility to supply liquid to the pressure chamber, and the second fluid passage, which is designed with the possibility to return liquid from the pressure chamber. Substrate has the fluid supply channel, which is connected to the first fluid passage for supplying liquid to the first fluid passage and the fluid return channel, which is connected to the second fluid passage for returning fluid from the second fluid passage. Pressure at the inlet portion of the liquid supply channel is higher than the pressure at the outlet portion of the liquid return channel, and the liquid flow rate in the pressure chamber is 3–140 mm/s.

EFFECT: liquid discharge head is proposed.

21 cl, 36 dwg