Liquid discharge method, liquid discharge head and liquid discharge apparatus
AssigneeCanon Kabushiki Kaisha
InventorsShuichi MURAKAMI, Yasunori TAKEI
Life of this patent
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Abstract
A liquid discharge head is arranged in a manner that in the cross section of a discharge port in a liquid discharge direction, the discharge port includes: at least one projection that is convex inside the discharge port; a first area, for holding a liquid surface connecting a pillar-shaped liquid that is elongated outside the discharge port; and second areas where a fluid resistance is lower than that in the first area so as to pull the liquid in the discharge port in a direction opposite to the liquid discharge direction; and the first area is formed in the direction in which the projection is convex, and the second areas are formed on both sides of the projection.
Claims4
1-17. (canceled)
A liquid discharge method for discharging liquid from a discharge port by driving an energy generating element and applying energy to the liquid, said method comprising the steps of:
- driving liquid through the discharge port as a pillar-shaped liquid extending outside, said discharge port including a plurality of projections projecting toward a center of the discharge port and a plurality of arcuate portions;
- transferring the liquid in an area formed by the arcuate portions in a direction opposite to a discharge direction of the liquid in a condition that the liquid is stretched to connect sections on ends of the plurality of projections;
- and
- separating the pillar-shaped liquid from the stretched liquid to discharge a liquid droplet in a condition that a liquid surface of the stretched liquid is positioned in front of a liquid surface formed in the area with respect to the discharge direction.
A liquid discharge head for discharging liquid from a discharge port by driving an energy generating element and applying energy to the liquid, wherein said liquid discharge head discharges liquid by driving liquid through the discharge port as a pillar-shaped liquid extending outside, said discharge port including a plurality of projections projecting toward a center of the discharge port and a plurality of arcuate portions, by transferring the liquid in an area formed by the arcuate portions in a direction opposite to a discharge direction of the liquid in a condition that the liquid is stretched to connect sections on ends of the plurality of projections and by separating the pillar-shaped liquid from the stretched liquid to discharge a liquid droplet in a condition that a liquid surface of the stretched liquid is positioned in front of a liquid surface formed in the area with respect to the discharge direction.
Dependencies are inferred from the claim text.