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US 2026/0054478 A1Published application
Liquid ejection apparatus and control method
AssigneeCanon Kabushiki Kaisha
InventorsYUJI NUKUI, FUMI TANAKA, KEIJI TOMIZAWA, SHUZO IWANAGA, KOICHI ISHIDA, YUZURU ISHIDA, YUGO YAMAMOTO
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Abstract
Provided is a liquid ejection apparatus capable of executing a kogation removal process at appropriate timing, thereby stably ejecting a liquid without shortening the lifespan of a head. For this purpose, the timing to execute the kogation removal operation of dissolving a metal in a protective layer through an electrochemical reaction with the liquid is determined based on information on an ejection characteristic of the liquid.
Claims19
A liquid ejection apparatus comprising:
- an ejection unit including
- a heating resistor configured to generate heat with power supply, thereby generating energy for ejecting a liquid,
- a protective portion configured to cover and protect the heating resistor, and
- an electrode portion capable of electrically connecting with the protective portion via the liquid;
- and
- a control unit configured to control a kogation removal operation of removing kogation by applying a voltage between the protective portion and the electrode portion, and thereby dissolving the protective portion into the liquid, wherein
- based on information on an ejection characteristic of a liquid, the control unit determines timing to execute the kogation removal operation in the ejection unit configured to eject the liquid.
4 more elements
A control method of a liquid ejection apparatus, comprising:
- an ejecting step of ejecting a liquid from an ejection unit with an action of a heating resistor;
- an obtaining step of obtaining information on an ejection characteristic of the liquid;
- and
- a dissolving step of dissolving a metal in a protective layer through an electrochemical reaction with the liquid, the protective layer provided in a heating portion on which heat generated by the heating resistor acts, wherein
- the dissolving step that is a kogation removal operation is executed based on the information on the ejection characteristic of the liquid obtained in the obtaining step.
2 more elements
Dependencies are inferred from the claim text.