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US 2007/0165078 A1Published application
Liquid ejection head, liquid cartridge, liquid ejection apparatus, image forming apparatus and manufacturing method of liquid ejecting head
AssigneeRicoh Company, Ltd.
InventorKenichiroh Hashimoto
Life of this patent
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Abstract
A liquid ejection head includes therein a movable member, wherein the movable member is formed of lamination of at least three layers, at least one layer thereof having a free edge part covered with another layer.
Claims21
A liquid ejection head, comprising:
- an ejection port for ejecting a liquid;
- a flow passage communicating with said ejection port;
- a device substrate provided with a heating body for forming a bubble in said liquid filled in said flow passage;
- and
- a movable member provided on said device substrate in a state such that a first end thereof is fixed upon said device substrate and a free end at an opposite end of said movable member is in a freely movable state, said movable member being provided so as to face said heating body such that there is formed a gap between said movable member and said device substrate, said movable member causing a displacement upon ejection of said liquid from said ejection port as a result of a pressure caused by formation of said bubble,
- wherein said movable member is constructed by lamination of three or more layers, an edge surface of at least one layer of said movable member being covered, at said free end, by another layer of said three or more layers.
3 more elements
A liquid ejection head, comprising:
- an ejection port for ejecting a liquid;
- a flow passage communicating with said ejection port;
- a device substrate provided with a heating body for forming a bubble in said liquid filled in said flow passage;
- and
- a movable member provided on said device substrate in a state such that a first end thereof is fixed upon said device substrate and a free end at an opposite end of said movable member is in a freely movable state, said movable member being provided so as to face said heating body such that there is formed a gap between said movable member and said device substrate, said movable member causing a displacement upon ejection of said liquid from said ejection port as a result of a pressure caused by formation of said bubble,
- said movable member comprising lamination of at least three layers of two, different materials, an edge surface of at least one layer of said movable member being covered, at said free end, by a layer forming an outermost layer of said movable member.
3 more elements
A liquid ejection head, comprising:
- an ejection port for ejecting a liquid;
- a flow passage communicating with said ejection port;
- a device substrate provided with a heating body for forming a bubble in said liquid filled in said flow passage;
- and
- a movable member provided on said device substrate in a state such that a first end thereof is fixed upon said device substrate and a free end at an opposite end of said movable member is in a freely movable state, said movable member being provided so as to face said heating body such that there is formed a gap between said movable member and said device substrate, said movable member causing a displacement upon ejection of said liquid from said ejection port as a result of a pressure caused by formation of said bubble,
- said movable member comprising lamination of two or more layers of two, different materials, said lamination including a first layer closest to said device substrate, an edge surface of said movable member being covered, at said free end, a layer of an odd number order as counted from said first layer.
3 more elements
A liquid ejection head, comprising:
- an ejection port for ejecting a liquid;
- a flow passage communicating with said ejection port;
- a device substrate provided with a heating body for forming a bubble in said liquid filled in said flow passage;
- and
- a movable member provided on said device substrate in a state such that a first end thereof is fixed upon said device substrate and a free end at an opposite end of said movable member is in a freely movable state, said movable member being provided so as to face said heating body such that there is formed a gap between said movable member and said device substrate, said movable member causing a displacement upon ejection of said liquid from said ejection port as a result of a pressure caused by formation of said bubble,
- said movable member comprising lamination of three or more layers of three, different materials, an edge surface of said movable member being covered, at said free end, said lamination including a first layer closest to said device substrate, an edge surface of said movable member being covered by an uppermost layer forming aid lamination and formed of a material identical with a material constituting said first layer.
3 more elements
A liquid ejection head, comprising:
- an ejection port for ejecting a liquid;
- a flow passage communicating with said ejection port;
- a device substrate provided with a heating body for forming a bubble in said liquid filled in said flow passage;
- and
- a movable member provided on said device substrate in a state such that a first end thereof is fixed upon said device substrate and a free end at an opposite end of said movable member is in a freely movable state, said movable member being provided so as to face said heating body such that there is formed a gap between said movable member and said device substrate, said movable member causing a displacement upon ejection of said liquid from said ejection port as a result of a pressure caused by formation of said bubble,
- said movable member comprising lamination of two or more layers of tow or more materials, said movable member having a flat edge surface at said free end.
3 more elements
A liquid ejection head, comprising:
- an ejection port for ejecting a liquid;
- a flow passage communicating with said ejection port;
- a device substrate provided with a heating body for forming a bubble in said liquid filled in said flow passage;
- and
- a movable member provided on said device substrate in a state such that a first end thereof is fixed upon said device substrate and a free end at an opposite end of said movable member is in a freely movable state, said movable member being provided so as to face said heating body such that there is formed a gap between said movable member and said device substrate, said movable member causing a displacement upon ejection of said liquid from said ejection port as a result of a pressure caused by formation of said bubble,
- said movable member having an initial bending in a direction opposite to said heating body.
3 more elements
A liquid cartridge comprising a liquid ejection head and a liquid container containing a liquid to be supplied to said liquid ejection head, said liquid container forming a unitary body with said liquid ejection head, said liquid ejection head, comprising:
- an ejection port for ejecting a liquid;
- a flow passage communicating with said ejection port;
- a device substrate provided with a heating body for forming a bubble in said liquid filled in said flow passage;
- and
- a movable member provided on said device substrate in a state such that a first end thereof is fixed upon said device substrate and a free end at an opposite end of said movable member is in a freely movable state, said movable member being provided so as to face said heating body such that there is formed a gap between said movable member and said device substrate, said movable member causing a displacement upon ejection of said liquid from said ejection port as a result of a pressure caused by formation of said bubble,
- wherein said movable member is constructed by lamination of three or more layers, an edge surface of at least one layer of said movable member being covered, at said free end, by another layer of said three or more layers.
3 more elements
The liquid ejection apparatus for ejecting a liquid from a liquid ejection head, said liquid ejection apparatus comprising a liquid ejection head comprising:
- an ejection port for ejecting a liquid;
- a flow passage communicating with said ejection port;
- a device substrate provided with a heating body for forming a bubble in said liquid filled in said flow passage;
- and
- a movable member provided on said device substrate in a state such that a first end thereof is fixed upon said device substrate and a free end at an opposite end of said movable member is in a freely movable state, said movable member being provided so as to face said heating body such that there is formed a gap between said movable member and said device substrate, said movable member causing a displacement upon ejection of said liquid from said ejection port as a result of a pressure caused by formation of said bubble,
- wherein said movable member is constructed by lamination of three or more layers, an edge surface of at least one layer of said movable member being covered, at said free end, by another layer of said three or more layers.
3 more elements
An image forming apparatus for forming an image on a recording medium by ejecting a liquid from a liquid ejection head, said image forming apparatus comprising any of a liquid ejection head comprising:
- an ejection port for ejecting a liquid;
- a flow passage communicating with said ejection port;
- a device substrate provided with a heating body for forming a bubble in said liquid filled in said flow passage;
- and
- a movable member provided on said device substrate in a state such that a first end thereof is fixed upon said device substrate and a free end at an opposite end of said movable member is in a freely movable state, said movable member being provided so as to face said heating body such that there is formed a gap between said movable member and said device substrate, said movable member causing a displacement upon ejection of said liquid from said ejection port as a result of a pressure caused by formation of said bubble,
- wherein said movable member is constructed by lamination of three or more layers, an edge surface of at least one layer of said movable member being covered, at said free end, by another layer of said three or more layers.
3 more elements
A method of manufacturing a liquid ejection head, said liquid ejection head comprising:
- an ejection port for ejecting a liquid;
- a flow passage communicating with said ejection port;
- a device substrate provided with a heating body for forming a bubble in said liquid filled in said flow passage;
- and a movable member provided on said device substrate in a state such that a first end thereof is fixed upon said device substrate and a free end at an opposite end of said movable member is in a freely movable state, said movable member being provided so as to face said heating body such that there is formed a gap between said movable member and said device substrate, said movable member causing a displacement upon ejection of said liquid from said ejection port as a result of a pressure caused by formation of said bubble, wherein said movable member is constructed by lamination of three or more layers, an edge surface of at least one layer of said movable member being covered, at said free end, by another layer of said three or more layers,
- said method comprising the steps of forming a part in which two or more layers of a same material are directly laminated;
- and
- etching said part.
4 more elements
Dependencies are inferred from the claim text.