发明申请
US20140125735A1 PRINT HEAD AND INKJET PRINTING APPARATUS 有权
打印头和喷墨打印设备

PRINT HEAD AND INKJET PRINTING APPARATUS
摘要:
A print head includes an energy generating element, a chamber for accommodating liquid, and an ejection opening for ejecting liquid from the chamber, thus applying the energy to the liquid in the chamber from the energy generating element to eject the liquid from the ejection opening, wherein the ejection opening includes at least two projections convex to an inside of the ejection opening in a cross section perpendicular to a liquid ejecting direction and has a tapered angle Φ1 in regard to the liquid ejecting direction, enabling a meniscus of the liquid to be formed therebetween at the liquid ejecting time, and an outer edge portion has a tapered angle Φ2 in regard to the liquid ejecting direction, wherein the tapered angles Φ1 and Φ2 are defined to meet a formula of 0°≦Φ1≦10° and a formula of Φ2>Φ1.
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