Canon Finetech Inc.

Canon Finetech Nisca Inc.

Kenro Yamaguchi

Takashi Sugai

Noritaka Ota

Kayo Mukai

Masayoshi Yazaki

Yoshihito Fukuda

Masaki Ota

A printing apparatus and a printing method which can suppress lowering of reading accuracy of a two-dimensional code caused by shift of a printing position of an image are provided. For that purpose, in printing of the two-dimensional code by a plurality of times of scanning, in a case where a boundary between image regions crosses a square-shaped minimum information element (cell) of the two-dimensional code, a printing position of the two-dimensional code is moved so that the boundary between the image regions comes to an end portion of the cell.

Printing apparatus and printing method

An ink jet printing apparatus includes a print head configured to be able to eject an ink fed from an ink tank that contains the ink in a closed space so as to apply a negative pressure to the ink, a communication path configured to allow a liquid chamber in the print head to communicate with an outside of the liquid chamber, an opening and closing unit configured to open and close the communication path, and a control unit configured to open the communication path in accordance with a pressure in the print head via the opening and closing unit, to bring the liquid chamber and the outside into communication with each other.

Ink jet printing apparatus and ink jet printing method

A liquid ejection head is capable of ejecting a liquid through an ejection port, the liquid being supplied from a liquid container with a negative pressure generating section. The liquid ejection head comprises a liquid chamber configured to contain the liquid, a liquid supply section configured to allow the liquid to be supplied from the liquid container to the liquid chamber, and an opening configured to communicate with the liquid chamber and to enable the liquid and/or a gas to flow into the liquid chamber through the opening.

Liquid ejection head and liquid ejection apparatus

A liquid ejection head is capable of ejecting a liquid through an ejection port, the liquid being supplied from a liquid container with a negative pressure generating section. The liquid ejection head comprises a liquid chamber configured to contain the liquid, a liquid supply section configured to allow the liquid to be supplied from the liquid container to the liquid chamber, and an opening configured to communicate with the liquid chamber and to enable the liquid and/or a gas inside the liquid chamber to flow out through the opening.

According to the present invention, in the case where the amount of ink remaining in an ink tank is detected using light from a light emitting unit, whether or not the amount of remaining ink is smaller than a predetermined value can be accurately determined with a decrease in the life of the light emitting unit suppressed. Thus, the present invention determines a difference between output signals each output by the light receiving unit according to a corresponding one of at least two of a plurality of levels of light emissions from the light emitting unit. Based on the difference, whether or not the amount of remaining ink is smaller than the predetermined value is determined.

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Noda, Japan

Kenro Yamaguchi