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US 2018/0001623 A1Published application
Inkjet printing apparatus and control method
AssigneeCanon Kabushiki Kaisha
InventorsTakatoshi Nakano, Minoru Teshigawara, Atsushi Takahashi, Takuya Fukasawa, Rinako Kameshima
Life of this patent
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Abstract
An inkjet printing apparatus and its control method which can suppress defective ejection and wasteful ink consumption are provided. For that purpose, pigment density Nx of the ink in a circulation path is calculated, and the ink in the circulation path is discharged on the basis of the pigment density Nx.
Claims9
An inkjet printing apparatus comprising:
- a print head configured to print an image by ejecting an ink from the ejection port;
- a tank configured to store the ink supplied to the print head;
- a connection channel for connecting the print head to the tank;
- a circulation path including the print head, the tank, and the connection channel and configured to circulate the ink between the print head and the tank,
- a discharging unit configured to perform a discharging operation for discharging the ink in the circulation path;
- a calculating unit configured to calculate a value relating to ink density in the circulation path;
- and
- a control unit configured to cause the discharging unit to perform the discharging operation based on the value relating to the ink density calculated by the calculating unit.
5 more elements
A control method of an inkjet printing apparatus including:
- a print head configured to print an image by ejecting an ink from an ejection port;
- a tank configured to store the ink supplied to the print head;
- a connection channel for connecting the print head to the tank;
- and a circulation path including the print head, the tank, and the connection channel and configured to circulate the ink between the print head and the tank, the method comprising:
- a calculating step of calculating a value relating to ink density in the circulation path;
- and
- a discharging control step of discharging the ink in the circulation path on the basis of the value relating to the ink density calculated by the calculating step.
4 more elements
Dependencies are inferred from the claim text.