Liquid ejection head, apparatus and recovery method for them
AssigneeCanon Kabushiki Kaisha
InventorsYoshie Asakawa, Toshio Kashino, Takeshi Okazaki, Aya Yoshihira, Kiyomitsu Kudo
Life of this patent
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Abstract
A liquid ejection head includes an ejection outlet for ejecting liquid; a bubble generating region for generating a bubble; a movable member disposed faced to the bubble generating region and movable between a first position and a second position which is farther form the bubble generating region than the first position; a liquid supply passage for supplying the liquid to the bubble generating region from upstream of the bubble generating region; an opening, in fluid communication with the supply passage, for discharging the liquid.
Claims35
A liquid ejection head comprising:
- an ejection outlet for ejecting liquid;
- a liquid path having a heat generating element for generating a bubble in the liquid by application of heat to the liquid, and a supply passage for supplying the liquid to the heat generating element from upstream side thereof;
- a movable member, disposed faced to said heat generating element and having a free end adjacent said ejection outlet, for directing a pressure produced by generation of the bubble, toward said ejection outlet, on the basis of the pressure produced by the generation of the bubble;
- and
- an opening, in fluid communication with said supply passage, for discharging the liquids,
- wherein said movable member has a fulcrum and a free end disposed downstream of the fulcrum.
A liquid ejection head comprising:
- an ejection outlet for ejecting liquid;
- a heat generating element for generating a bubble in the liquid by application of heat to the liquid;
- a movable member, disposed faced to said heat generating element and having a free end adjacent said ejection outlet, for directing a pressure produced by generation of the bubble, toward said ejection outlet;
- a supply passage for supplying the liquid to said heat generating element from an upstream thereof along a surface of said movable member adjacent said heat generating element;
- an opening, in fluid communication with said supply passage, for discharging the liquid,
- wherein the heat generating element is provided faced to said movable member, and said bubble generating region is formed between said movable member and said heat generating element.
A liquid ejection head comprising:
- a first liquid flow path in fluid communication with an ejection outlet;
- a second liquid flow path having bubble generation region for generating the bubble in the liquid by applying heat to the liquid;
- a movable member, disposed between said first liquid flow path and said bubble generating region and having a free end adjacent said ejection outlet, for directing a pressure produced by generation of the bubble, toward said ejection outlet of said first liquid flow path, by movement of the free end into said first liquid flow path on the basis of pressure produced by generation of the bubble the bubble generating region;
- an opening, in fluid communication with said supply passage, for discharging the liquid.
A liquid ejection head comprising:
- a plurality of ejection outlet for ejecting liquid;
- a plurality of grooves for constituting a plurality of first liquid flow paths in direct fluid communication with associated ones of said ejection outlets;
- a recess for constituting a first common liquid chamber for supplying the liquid to said first liquid flow paths;
- wherein said grooves and said recess are formed in a grooved member;
- an element substrate having a plurality of heat generating elements for generating the bubble in the liquid by applying heat to the liquid;
- and
- a partition wall disposed between said grooved member and said element substrate and forming a part of walls of second liquid flow paths corresponding to said heat generating elements, and a movable member movable into said first liquid flow paths by pressure produced by the generation of the bubble, said movable member being faced to said heat generating element;
- and
- an opening, in fluid communication with said supply passage, for discharging the liquid.
Dependencies are inferred from the claim text.