Canon Kabushiki Kaisha

Yasutoshi Saito

Hiroshi Tajika

Hiroyuki Ishinaga

Osamu Iwasaki

Masami Ikeda

Toshio Kashino

Hidehiko Kanda

Masaaki Izumida

Yoshie Asakawa

Jun Kawai

Masaya Uetuki

Hajime Kaneko

Masahiko Tonogaki

A liquid jet head is provided with discharge ports for discharging liquid, liquid flow paths conductively connected with the discharge ports, air bubble generating areas for creating air bubbles in the liquid, and movable members arranged to face the air bubble generating areas, each having a free end in a position relatively near to the discharge port with respect to a fulcrum thereof. This movable member is inclined to position the free end of the movable member to release the air bubble generating area partly to the discharge port so as to enable the tangential line of the free end of the movable member on the side of the air bubble generating area or the extended line thereof to reach directly the discharge port formation area having the discharge port on the liquid flow path side before the creation of air bubble on the air bubble generating area, and with this position as reference, the movable member is displaced following the creation of air bubble on the air bubble generating area. With this arrangement, the liquid discharging efficiency and speed are significantly enhanced as compared with the conventional liquid jet head, and due to more stabilized discharge of droplets from the discharge ports, the quality of recorded images is improved.

Liquid jet head with a movable member, head cartridge using the liquid jet head, liquid jet apparatus and liquid discharging method

An ink jet head having a plurality of electrothermal transducer elements in one liquid passage is arranged so that the ratio of the areas of two of the plurality of electrothermal transducer elements is smaller than the ratio of the amounts of ink ejected by the two electrothermal transducer elements, thereby stably obtaining the desired amounts of ejected ink and achieving a high gradational effect at a high energy efficiency.

Liquid jet head, head cartridge, liquid jet apparatus, method of

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Kawasaki, Japan

Yasutoshi Saito