Inkjet head having arrangement for preventing clogging of...

Details Inkjet head having arrangement for preventing clogging of... Inkjet head having arrangement for preventing clogging of...

2008-05-13

2008-05-13

Hsieh, Shih-Wen (Department: 2861)

Incremental printing of symbolic information

Ink jet

Ejector mechanism

Reexamination Certificate

active

07370934

ABSTRACT:
An inkjet head including: (a) a passage defining unit having (a-1) pressure chambers and (a-2) inlets opening in its an inlet defining surface and held in communication with the pressure chambers; (b) a filter plate disposed on the inlet defining surface of the passage defining unit; (c) a frame fixed to the inlet defining surface of the passage defining unit, and having an aperture which is formed therethrough such that the filter plate is surrounded by an inner circumferential surface of the aperture; and (d) an elastic plate disposed within the aperture of the frame, and having communication through-holes held in communication with the respective inlets of the passage defining unit through the filter plate. The frame includes an inward protrusion which protrudes inwardly from the inner circumferential surface of the aperture. The elastic plate includes an outward protrusion which protrudes outwardly from its outer circumferential surface and which is held between the inward protrusion of the frame and the filter plate and/or between the inward protrusion and the passage defining unit.

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