Abstract: Provided is an inkjet head, including: a substrate having an energy generating element for generating energy to be used for ejecting liquid; and a liquid flow path forming member, which forms patterns of an ejection orifice for ejecting the liquid and a liquid flow path communicating with the ejection orifice and which has a surface subjected to water-repellent treatment, in which the inkjet head includes, in a surface having the ejection orifice, multiple water-repellent areas subjected to water-repellent treatment, and multiple recesses each having a bottom in the liquid flow path forming member and having a surface not subjected to water-repellent treatment. Also provided is a method of manufacturing an inkjet head.

Abstract: A bulk ink supply system of an inkjet printer includes a connector, an ink flow path, and an on-off valve. The connector is attachable to and detachable from an ink container. The connector includes an ink guiding path formed in the connector. The ink flow path connects the ink guiding path and an inkjet head of the inkjet printer to supply an ink from the ink guiding path to the inkjet head. The on-off valve allows communication between the ink guiding path and the ink flow path when the ink container is attached to the connector and hinders communication between the ink guiding path and the ink flow path when the ink container is detached from the connector.

Abstract: A liquid ejecting head includes a liquid supply member including a flow channel formation member in which flow channel groove portions having different lengths is formed each, a flexible member that seals an opening of each of the flow channel groove portions to form a liquid flow channel, a pressure reception portion formation plate that has an opening formed for each of the liquid flow channels, each of the openings overlapping the corresponding liquid flow channel formed, and valves each urged by a coil spring to close the corresponding liquid flow channel, the valve opening the channel against an urging force of the spring due to the positional change of a pressure reception portion as pressure inside the liquid flow channel changes, wherein the openings of the pressure reception portion formation plate have a uniform shape.