Ricoh Company, Ltd.

Yu Watanabe

A liquid discharge head includes: a nozzle substrate including a nozzle, from which a liquid is discharged in a discharge direction, on a nozzle face; a chamber forming plate on a first face of the nozzle substrate and including a pressure chamber communicating with the nozzle, the first face opposite to the nozzle face in the discharge direction; and a frame holding the chamber forming plate on a second face and including a rib on each end of the frame outside the nozzle substrate in a longitudinal direction orthogonal to the discharge direction, and a leading end of the rib protruding from the second face of the frame toward the nozzle face and not protruding from the nozzle face in the discharge direction.

Liquid discharge head, liquid discharge head module, and liquid discharge apparatus

A liquid discharge head includes: multiple nozzles though which a liquid is to be discharged, each of the multiple nozzles having a nozzle diameter; a multiple pressure chambers respectively communicating with the multiple nozzles; a supply common chamber communicating with each of the multiple pressure chambers to supply the liquid to each of the multiple pressure chambers; a collection common chamber communicating with each of the multiple pressure chambers to collect the liquid from the multiple pressure chambers; a supply port communicating with the supply common chamber to supply the liquid to the supply common chamber; a discharge port communicating with the collection common chamber to discharge the liquid from the collection common chamber; and a first filter between the supply port and the pressure chamber, the first filter having first multiple openings each having a first diameter smaller than the nozzle diameter.

Liquid discharge head, liquid discharge device, liquid discharge apparatus, and liquid circulation apparatus

A liquid discharge head includes an actuator substrate including a pressure chamber communicating with a nozzle from which a liquid is to be discharged and a pressure generator to apply pressure to the liquid in the pressure chamber, a frame bonded to the actuator substrate and having a through hole filled with a resin, and a temperature detector inserted into the through hole and attached to the actuator substrate with the resin to detect a temperature of the actuator substrate. The through hole has a first face facing the actuator substrate and a second face opposite to the first face and facing an opening of the frame. The resin in the through hole includes an uncured portion uncured and facing the first face and a cured portion cured and facing the second face. The uncured portion contacts the actuator substrate and is between the cured portion and the actuator substrate.

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Kanagawa, Japan

Yu Watanabe