Inspection apparatus and printing apparatus
AssigneeCanon Kabushiki Kaisha
InventorTakuma Kodoi
Life of this patent
Estimating the term…
Abstract
A printing head includes printing element boards which are in fluid communication with each other through a liquid chamber, includes an inlet port and an outlet port, and is arranged such that the ink circulates inside the liquid chamber, and inside the liquid chamber, the ink circulates in nozzle portions in the printing element boards. An inspection apparatus includes: the printing head; an inlet passage; an outlet passage; an ink circulatory system; an inlet temperature sensor; and an outlet temperature sensor, and estimates a temperature distribution of the printing head from measured values of the inlet temperature sensor and the outlet temperature sensor and calculates calibration values of the temperature sensors of the respective printing element boards.
Claims20
A printing head inspection apparatus, comprising:
- a printing head, the printing head including a plurality of printing element boards, each of the printing element boards including a temperature sensor which outputs a temperature as a voltage value and a plurality of ejection ports through which to eject a liquid, the plurality of printing element boards being in fluid communication with each other through a liquid chamber, the printing head including an inlet port through which to introduce ink into the printing head and an outlet port through which to discharge the ink to an outside, the printing head being arranged such that the ink circulates inside the printing element boards and the liquid chamber;
- an ink tank;
- an ink circulatory system which causes the ink to circulate between the printing head and the ink tank;
- an inlet temperature sensor which measures a temperature of the ink introduced through the inlet port;
- and
- an outlet temperature sensor which measures a temperature of the ink discharged from the outlet port, wherein
- the printing head inspection apparatus estimates a temperature distribution of the printing head from measured values of the inlet temperature sensor and the outlet temperature sensor.
A printing apparatus comprising:
- a printing head, the printing head including a plurality of printing element boards, each of the printing element boards including a temperature sensor which outputs a temperature as a voltage value and a plurality of ejection ports through which to eject a liquid, the plurality of printing element boards being in fluid communication with each other through a liquid chamber, the printing head including an inlet port through which to introduce ink into the printing head and an outlet port through which to discharge the ink to an outside, the printing head being arranged such that the ink circulates inside the printing element boards and the liquid chamber;
- an ink tank;
- an ink circulatory system which causes the ink to circulate between the printing head and the ink tank;
- an inlet temperature sensor which measures a temperature of the ink introduced through the inlet port;
- and
- an outlet temperature sensor which measures a temperature of the ink discharged from the outlet port, wherein
- the printing apparatus estimates a temperature distribution of the printing head from measured values of the inlet temperature sensor and the outlet temperature sensor.
Dependencies are inferred from the claim text.