Ink jet head having curved ink
First Claim
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1. An ink jet head for compressing ink to eject drops of ink, said ink jet head comprising:
- (a) a housing;
(b) an ink chamber defined in said housing;
(c) a nozzle defined in said housing and communicating with said ink chamber;
(d) a non-conductive substrate in opposing relationship to said housing;
(e) a first conductive layer deposited on said non-conductive substrate, said first conductive layer being in opposed relationship to said ink chamber, being curved inwardly toward said ink chamber, and having a radius of curvature R; and
(f) a thin film composed of a piezoelectric high molecular substance overlying said first conductive layer and in electrical contact with said first conductive layer,whereby, when a voltage is applied to said first conductive layer during use of the ink jet head, said thin film flexes further into said ink chamber and forces ink in said ink chamber out through said nozzle.
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Abstract
An ink jet head for compressing ink in an ink chamber to eject a drop of the ink from a nozzle. Ink compressing means for compressing the ink in the ink chamber by expanding and contracting in response to a voltage applied thereto is made of a piezoelectric high molecular substance. The ink compressing means comprises a single thin film of polyvinylidene fluoride (PVDF) or two PVDF films bonded together in a bimorph structure. Multiple nozzles are arranged in a predetermined direction. The PVDF film expands and contracts in a direction parallel to the direction of arrangement of the multiple nozzles.
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11 Claims
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1. An ink jet head for compressing ink to eject drops of ink, said ink jet head comprising:
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(a) a housing; (b) an ink chamber defined in said housing; (c) a nozzle defined in said housing and communicating with said ink chamber; (d) a non-conductive substrate in opposing relationship to said housing; (e) a first conductive layer deposited on said non-conductive substrate, said first conductive layer being in opposed relationship to said ink chamber, being curved inwardly toward said ink chamber, and having a radius of curvature R; and (f) a thin film composed of a piezoelectric high molecular substance overlying said first conductive layer and in electrical contact with said first conductive layer, whereby, when a voltage is applied to said first conductive layer during use of the ink jet head, said thin film flexes further into said ink chamber and forces ink in said ink chamber out through said nozzle. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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Specification