Liquid ejection head and printing apparatus
AssigneeCanon Kabushiki Kaisha
InventorsKeiji Tomizawa, Ken Tsuchii, Shuichi Ide
Life of this patent
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Abstract
The present invention provides a reliable print head with improved reliability which is inhibited from being damaged by possible cavitation in ink inside a bubbling chamber, as well as a printing apparatus using the print head. A plurality of ink supply paths through which the ink is supplied to the bubbling chamber are connected to the bubbling chamber. Communication positions where the plurality of ink supply paths communicate with the energy acting chamber are formed such that distanced from a heater formation surface of the communication positions are different from each other along a direction orthogonal to the heater formation surface.
Claims6
A liquid ejection head comprising:
- a substrate;
- a heating element disposed on the substrate to generate heat energy utilized to eject a liquid;
- an energy acting chamber partly defined by the substrate and in which the heating element is disposed;
- and
- an ejection port portion provided opposite the heating element to eject the liquid contained in the energy acting chamber to which the heat energy is applied by the heating element,
- wherein a plurality of liquid supply paths through which the liquid is supplied to the energy acting chamber are connected to the energy acting chamber, and
- communication positions where the plurality of liquid supply paths communicate with the energy acting chamber are formed such that distances from a heating element formation surface to each of the communication positions are different from each other along a direction orthogonal to the heating element formation surface.
A printing apparatus performing printing using a liquid ejection head comprising:
- a substrate;
- a heating element disposed on the substrate to generate heat energy utilized to eject a liquid;
- an energy acting chamber partly defined by the substrate and in which the heating element is disposed;
- and
- an ejection port portion provided opposite the heating element to eject the liquid contained in the energy acting chamber to which the heat energy is applied by the heating element,
- wherein a plurality of liquid supply paths through which the liquid is supplied to the energy acting chamber are connected to the energy acting chamber, and
- communication positions where the plurality of liquid supply paths communicate with the energy acting chamber are formed such that distances from a heating element formation surface to each of the communication positions are different from each other along a direction orthogonal to the heating element formation surface.
Dependencies are inferred from the claim text.