Invention Grant
US07681988B2 Ink jet recording head and ink jet recording apparatus with nozzle member having an ink-repellent layer 有权
具有喷墨构件的喷墨记录头和喷墨记录装置具有防墨层

Ink jet recording head and ink jet recording apparatus with nozzle member having an ink-repellent layer
Abstract:
An inkjet recording head using pigment ink as discharged ink includes a nozzle member having a nozzle for discharging ink. The nozzle member has an ink-repellent layer forming a discharge port face having a discharge port that is an open end of the nozzle. The ink jet recording head further includes a projection portion positioned around the discharge port and protruding along a central axis of the nozzle with respect to the discharge port face. The nozzle, in a cross section passing through the central axis of the nozzle, has an outline shape provided with a curved line having a changing curvature radius. A point at which the curvature radius of the curved line is minimum is included in the projection portion and has a maximum height from the discharge port face in the cross section.
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