Patent ID: 6422686
Filing Date: 2002-07-23
Classification: B41J

Abstract:
A liquid discharge head having:an orifice plate in which a plurality of discharge ports for discharging liquid droplets there through are arranged in a row; and a head body provided with a plurality of flow paths communicating with said plurality of discharge ports, a liquid chamber for supplying liquid to said plurality of flow paths, and a plurality of energy generation elements disposed correspondingly to said plurality of flow paths and generating energy for discharging the liquid droplets, wherein said orifice plate is joined to the surface of said head body in which the communication ports of said flow paths communicating with said discharge ports are disposed; wherein said orifice plate is formed with wall-shaped convex portions protruding from the inner peripheral portions of said discharge ports and having at least a portion entering from said communication ports into said flow paths, and the width of said wall-shaped convex portions is greater in the portions parallel to the row direction in which said plurality of discharge ports are arranged than in the portions orthogonal to said row direction.