Patent ID: 6186619
Filing Date: 2001-02-13
Classification: B41J

Abstract:
An ink jet printing head, comprising:a base;a nozzle plate defining a plurality of nozzle apertures;an array of piezoelectric elements, said piezoelectric elements being arranged at predetermined intervals;wherein each of said piezoelectric elements has one surface that is fixed onto said base and another surface which confronts a respective one of the nozzle apertures of said nozzle plate;wherein said piezoelectric elements have a predetermined width and include alternately stacked piezoelectric material and conductive material which form a lamination having multiple piezoelectric layers and multiple conductive layers, wherein a lamination direction coincides with a main vibrating direction, and said piezoelectric elements are formed by burning the lamination of said piezoelectric material layers and said conductive material layers to provide a piezoelectric plate, and cutting said piezoelectric plate into a plurality of piezoelectric elements;wherein the main vibrating direction is a direction extending between the one surface and said another surface through each of said piezoelectric elements;wherein gaps for storing ink are respectively provided between said another surfaces of said piezoelectric elements and the respective ones of the nozzle apertures of said nozzle plate;wherein said piezoelectric elements include a row of said piezoelectric elements alternating between first piezoelectric elements and second piezoelectric elements; andwherein, of said piezoelectric elements, only said first piezoelectric elements are configured to produce an ink jetting force in accordance with print signals supplied to the ink jet printing head.