Canon Kabushiki Kaisha

Junya Kosuge

Yumi Mukoyama

Tsuyoshi Saeki

Toshiaki Tokisawa

Takashi Abe

Kyoshiro Okude

Ryoma Arai

An inkjet printing apparatus includes a tank in which ink is contained; a print head for ejecting ink supplied from the tank to perform print operation; a supply flow path for supplying ink from the tank to the print head; a collection flow path for collecting ink from the print head to the tank; and a pump provided in the supply flow path or the collection flow path. The pump is driven, during print operation, at a first speed to circulate ink within a circulation path including the tank, the supply flow path, the print head, and the collection flow path, and the pump is driven, from a start of the ink circulation until a lapse of predetermined time period, at a second speed which is faster than the first speed.

Inkjet printing apparatus and control method of the same

An inkjet printing apparatus includes: a print head provided with an ejection opening surface; a tank; a supply flow path; a collection flow path; an intra-tank vacuum pump to reduce pressure inside the tank; and a control unit. The control unit performs a first operation and a second operation, the first operation causing the intra-tank vacuum pump to operate while a collection drive valve is closed, so as to pull out ink in a flow path which extends from the ejection opening to the supply flow path into the tank, the second operation causing the intra-tank vacuum pump to operate while a supply drive valve is closed, so as to pull out ink in a flow path which extends from the ejection opening to the collection flow path into the tank.

Inkjet printing apparatus and control method of inkjet printing apparatus

An object of the present invention is to provide an ink jet printing apparatus whose compactness is improved. The ink jet printing apparatus includes: a print head; an ink tank for each ink color; an ink flow path plate for each ink color having a supply flow path that guides the ink supplied from the ink tank to the print head and a recovery flow path that guides the ink recovered from the print head to the ink tank; a flow path concentration plate in which the supply flow path and the recovery flow path for each ink color are concentrated and which guides the ink between the ink flow path plate and the print head; and one or a plurality of function parts provided within a range of a space demarcated by the ink flow path plate and the flow path concentration plate.

Ink jet printing apparatus

In a color inkjet printing apparatus using an ink circulation system, there is provided an inkjet printing apparatus capable of making appropriate circulation control for individual inks without resulting in cost increase. To achieve this, an inkjet printing apparatus includes a plurality of diaphragm pumps for circulating ink within a print head, a sub-tank, a supply flow path, and a collection flow path. The plurality of diaphragm pumps are configured by mounting control members of different types which can press against diaphragm units of a same type.

Inkjet printing apparatus

An inkjet printing apparatus includes a tank, a print head including a pressure chamber filled with ink supplied from the tank and an ejection opening which is communicated with the pressure chamber and which ejects ink filled in the pressure chamber a supply flow path for supplying ink from the tank to the print head, a collection flow path for collecting ink from the print head to the tank, a circulation unit configured to circulate ink so as to flow through the supply flow path, an inside of the pressure chamber, and the collection flow path, and a buffer chamber disposed inside the print head or in the collection flow path and which is volume variable. The tank is disposed higher than the print head in a vertical direction, and a one-way valve is provided between the buffer chamber and the tank in the collection flow path.

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Kawasaki, Japan

Junya Kosuge