Patent ID: 7370934
Filing Date: 2008-05-13
Classification: B41J

Abstract:
1. An inkjet head comprising: (a) a passage defining unit having (a-1) plurality of pressure chambers held in communication with respective nozzles, and (a-2) a plurality of inlets opening in an inlet defining surface thereof and held in communication with said plurality of pressure chambers; (b) a filter plate disposed on said inlet defining surface of said passage defining unit, and including a non-peripheral portion which is opposed to said plurality of inlets; (c) a frame fixed to a portion of said inlet defining surface of said passage defining unit which is uncovered by said filter plate, and having an aperture which is formed therethrough such that said filter plate is surrounded by an inner circumferential surface of said aperture; and (d) an elastic plate disposed within said aperture of said frame, and having a plurality of communication through-holes which are held in communication with the respective inlets of said passage defining unit through said non-peripheral portion of said filter plate, wherein said frame includes an inward protrusion which protrudes inwardly from said inner circumferential surface of said aperture, and wherein said elastic plate includes an outward protrusion which protrudes outwardly from an outer circumferential surface thereof and which is held between said inward protrusion of said frame and at least one of said filter plate and said passage defining unit.