Liquid ejection head and recording device
AssigneeCanon Kabushiki Kaisha
InventorsNORIYASU NAGAI, NAOZUMI NABESHIMA
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Abstract
A liquid ejection head includes: a recording element substrate including an ejection port, an energy generation element which generates energy to eject liquid from the ejection port, a supply path which supplies liquid to the ejection port, and a collection path which collects liquid not ejected from the ejection port; and a pressure control unit controlling pressure of liquid inside the supply path to be positive pressure and pressure of liquid inside the collection path to be negative pressure, so that pressure of liquid in the ejection port becomes negative pressure.
Claims19
A liquid ejection head comprising:
- a recording element substrate including an ejection port, an energy generation element which generates energy to eject liquid from the ejection port, a supply path which supplies liquid to the ejection port, and a collection path which collects liquid not ejected from the ejection port;
- and
- a pressure control unit controlling pressure of liquid inside the supply path to be positive pressure and pressure of liquid inside the collection path to be negative pressure so that pressure of liquid in the ejection port becomes negative pressure.
A recording device comprising:
- a liquid ejection head equipped with a recording element substrate including an ejection port, an energy generation element which generates energy to eject liquid from the ejection port, a supply path which supplies liquid to the ejection port, and a collection path which collects liquid not ejected from the ejection port;
- and
- a pressure control unit controlling pressure of liquid inside the supply path to be positive pressure and pressure of liquid inside the collection path to be negative pressure so that pressure of liquid in the ejection port becomes negative pressure.
Dependencies are inferred from the claim text.