Patent ID: 7506962
Filing Date: 2009-03-24
Classification: B41J

Abstract:
1. A liquid discharge head, wherein a liquid is discharged from a discharge port by applying energy to the liquid from an energy generating element, wherein said discharge port includes, in a cross-section relative to a liquid discharge direction, at least one projection, which is convexly shaped and is formed inside said discharge port, a first area for holding a liquid surface that is to be connected to the liquid in a pillar shape stretched outside said discharge port when the liquid is discharged from said discharge port, and a second area to which the liquid in said discharge port is to be drawn in a direction opposite to the liquid discharge direction, and which has a fluid resistance that is lower than that of said first area, and said first area is formed in a direction in which said projection is convexly shaped, and said second area is formed on both sides of said projection.