US6113223A — Ink jet recording head with ink chamber having sl…

Claim 1

Independent Claim 222 words

An ink jet recording head for recording on a recording medium using an ink, comprising: a plurality of liquid passages terminating in respective ejection outlets, at respective longitudinal ends of said liquid passages, for ejection of the ink and each having an ejection energy generating means for generating ejection energy provided on a substrate, said liquid passages being approximately parallel to one another and being disposed in a plane; a liquid chamber in fluid communication with said plurality of liquid passages, said liquid chamber containing the ink to be supplied to said liquid passages; an inlet for supplying the ink to said liquid chamber, wherein said ejection outlets, said liquid passage and said liquid chamber are arranged in this order from one end of said ink jet recording head, and said liquid chamber having a first slanted inner surface extending from said inlet to said liquid passages, a second slanted inner surface and a third slanted inner surface extending from said inlet laterally with respect to a direction in which said passages extend and continuously from said first slanted surface, said first, said second and said third slanted surfaces being inclined relative to a plane of said substrate, and having a region, disposed between said liquid passages and said first slanted portion, for suppressing movement of the bubble toward said liquid passages.

Claim 2

Dependent Claim 222 words

An ink jet recording head for recording on a recording medium using an ink, comprising: a plurality of liquid passages terminating in respective ejection outlets, at respective longitudinal ends of said liquid passages, for ejection of the ink and each having an ejection energy generating means for generating ejection energy provided on a substrate, said liquid passages being approximately parallel to one another and being disposed in a plane; a liquid chamber in fluid communication with said plurality of liquid passages, said liquid chamber containing the ink to be supplied to said liquid passages; an inlet for supplying the ink to said liquid chamber, wherein said ejection outlets, said liquid passage and said liquid chamber are arranged in this order from one end of said ink jet recording head, and said liquid chamber having a first slanted inner surface extending from said inlet to said liquid passages, a second slanted inner surface and a third slanted inner surface extending from said inlet laterally with respect to a direction in which said passages extend and continuously from said first slanted surface, said first, said second and said third slanted surfaces being inclined relative to a plane of said substrate, and having a region, disposed between said liquid passages and said first slanted portion, for suppressing movement of the bubble toward said liquid passages.

Claim 3

Dependent Claim 30 words

An ink jet recording head according to claim 1, wherein said ejection energy generating means comprises an electrothermal transducer in said liquid passage for producing film boiling of the ink.

Claim 4

Dependent Claim 29 words

An ink jet recording head according to claim 1, wherein said chamber has an internal surface which is slanted in a lateral direction at an angle of 5-40 degrees.

Claim 5

Dependent Claim 19 words

An ink jet recording head according to claim 3, wherein said first-mentioned angle is larger than said second-mentioned angle.

Claim 6

Dependent Claim 34 words

An ink jet recording head according to claim 3, wherein said liquid passage has a trapezoidal cross-section having a longer side aligned with a surface on which an ejection energy generating means is disposed.

Claim 7

Dependent Claim 17 words

A recording head according to claim 5, wherein said first-mentioned angle is larger than said second-mentioned angle.

Claim 8

Dependent Claim 16 words

A recording head according to claim 6, wherein said ejection outlet has a corresponding trapezoidal configuration.

Claim 9

Dependent Claim 15 words

An ink jet recording head according to claim 7, wherein the trapezoidal configuration is symmetric.

Claim 10

Dependent Claim 48 words

An ink jet recording head according to claim 6, further comprising a first region wherein said liquid passage is expanding adjacent said ejection outlet while maintaining the trapezoidal configuration and a second region wherein the liquid passage is converging while maintaining the trapezoidal configuration to said ejection outlet.

Claim 11

Dependent Claim 27 words

A recording head according to claim 9, wherein said first and second regions are symmetric about a plane connecting centers of the sides of the trapezoidal configuration.

Claim 12

Dependent Claim 45 words

A recording head according to claim 6 wherein there is a region between said liquid passage and said slanted surface which expands toward said ink inlet, and an extension of said slanted surface abuts a surface on which said ejection energy generating means is disposed.

Claim 13

Dependent Claim 57 words

An ink jet recording head according to claim 1, wherein said liquid chamber has a region continuing from said liquid passage and expanding to said ink inlet, said slanted internal surface extending from said ink inlet to said region, wherein an extension of said slanted surface abuts a surface on which an energy generating element is disposed.

Claim 14

Dependent Claim 26 words

A recording head according to claim 12, wherein said slanted internal surface forms an angle of 5-30 degrees relative to an extension of said liquid passage.

Claim 15

Dependent Claim 27 words

A recording head according to claim 12, wherein said chamber has an internal surface which is slanted in a lateral direction at an angle of 5-30 degrees.

Claim 16

Dependent Claim 21 words

A recording head according to claim 14, wherein the angle of said laterally slanted surface is smaller than said first-mentioned angle.

Claim 17

Dependent Claim 24 words

An ink jet recording head according to claim 12, wherein said ink jet recording head is detachably mountable in an ink jet recording apparatus.

Claim 18

Dependent Claim 13 words

A recording head according to claim 16, wherein said liquid chamber is molded.

Claim 19

Dependent Claim 18 words

A recording head according to claim 17, wherein said liquid chamber is provided with an ink supply member.

Claim 20

Dependent Claim 28 words

A recording head according to claim 12, wherein said liquid chamber has another internal surface which is slanted in a lateral direction at an angle of 5-40 degrees.

Claim 21

Dependent Claim 34 words

An ink jet recording head according to claim 1, wherein said recording head is carried on a carriage having a carrying surface inclined from a horizontal plane at an angle less than 45 degrees.

Claim 22

Dependent Claim 27 words

An ink jet recording head according to claim 1, wherein the ink is sucked out through the ejection outlets upon a recovery operation for said recording head.

Claim 23

Dependent Claim 39 words

An ink jet recording head according to claim 1, wherein a member in which said ejection outlets are provided and a member constituting said liquid passages are integrally formed, and the ejection outlets are formed by a laser beam.

Claim 24

Dependent Claim 36 words

An ink jet recording head according to claim 1, wherein a member in which said ejection outlets are provided and said substrate are abutted to each other, positioned to each other and connected to each other.

Claim 25

Dependent Claim 231 words

An ink jet recording apparatus, comprising; an ink jet recording head for recording on a recording medium using an ink, said ink jet recording head including; a plurality of liquid passages terminating in respective ejection outlets, at respective longitudinal ends of said liquid passages, for ejection of the ink and each having an ejection energy generating means for generating ejection energy provided on a substrate, said liquid passages being approximately parallel to one another and being disposed in a plane; a liquid chamber in fluid communication with said plurality of liquid passages, said liquid chamber containing the ink to be supplied to said liquid passages; an inlet for supplying the ink to said liquid chamber, wherein said ejection outlets, said liquid passage and said liquid chamber are arranged in this order from one end of said ink jet recording head, and said liquid chamber having a first slanted inner surface extending from said inlet to said liquid passages, a second slanted inner surface and a third slanted inner surface extending from said inlet laterally with respect to a direction in which said passages extend and continuously from said first slanted surface, and having a region, disposed between said liquid passages and said first slanted portion, for suppressing movement of the bubble toward the liquid passages; and sucking means for sucking the ink out of said recording head through said ejection outlet.

Claim 26

Dependent Claim 231 words

An ink jet recording apparatus, comprising; an ink jet recording head for recording on a recording medium using an ink, said ink jet recording head including; a plurality of liquid passages terminating in respective ejection outlets, at respective longitudinal ends of said liquid passages, for ejection of the ink and each having an ejection energy generating means for generating ejection energy provided on a substrate, said liquid passages being approximately parallel to one another and being disposed in a plane; a liquid chamber in fluid communication with said plurality of liquid passages, said liquid chamber containing the ink to be supplied to said liquid passages; an inlet for supplying the ink to said liquid chamber, wherein said ejection outlets, said liquid passage and said liquid chamber are arranged in this order from one end of said ink jet recording head, and said liquid chamber having a first slanted inner surface extending from said inlet to said liquid passages, a second slanted inner surface and a third slanted inner surface extending from said inlet laterally with respect to a direction in which said passages extend and continuously from said first slanted surface, and having a region, disposed between said liquid passages and said first slanted portion, for suppressing movement of the bubble toward the liquid passages; and sucking means for sucking the ink out of said recording head through said ejection outlet.

Claim 27

Dependent Claim 39 words

An ink jet recording apparatus according to claim 24, wherein a member in which said ejection outlets are provided and a member constituting said liquid passages are integrally formed, and the ejection outlets are formed by a laser beam.

Claim 28

Dependent Claim 36 words

An ink jet recording apparatus according to claim 24, wherein a member in which said ejection outlets are provided and said substrate are abutted to each other, positioned to each other and connected to each other.

Claim 29

Dependent Claim 35 words

An ink jet recording apparatus according to claim 24, wherein said first, said second and said third slanted surfaces are inclined relative to a plane of said substrate at a converging angle of 5-40 degrees.

Claim 30

Dependent Claim 233 words

An ink jet recording cartridge comprising: an ink jet recording head for recording on a recording medium using an ink, said ink jet recording medium having; a plurality of liquid passages terminating in respective ejection outlets, at respective longitudinal ends of said liquid passages, for ejection of the ink and each having an ejection energy generating means for generating ejection energy provided on a substrate, said liquid passages being approximately parallel to one another and being disposed in a plane; a liquid chamber in fluid communication with said plurality of liquid passages, said liquid chamber containing the ink to be supplied to said liquid passages; an inlet for supplying the ink to said liquid chamber, wherein said ejection outlets, said liquid passage and said liquid chamber are arranged in this order from one end of said ink jet recording head, and said liquid chamber having a first slanted inner surface extending from said inlet to said liquid passages, a second slanted inner surface and a third slanted inner surface extending from said inlet laterally with respect to a direction in which said passages extend and continuously from said first slanted surface, and having a region, disposed between said liquid passages and said first slanted portion, for suppressing movement of the bubble toward the liquid passages; and an ink container for containing the ink to be supplied to said inlet of said recording head.

Claim 31

Dependent Claim 233 words

An ink jet recording cartridge comprising: an ink jet recording head for recording on a recording medium using an ink, said ink jet recording medium having; a plurality of liquid passages terminating in respective ejection outlets, at respective longitudinal ends of said liquid passages, for ejection of the ink and each having an ejection energy generating means for generating ejection energy provided on a substrate, said liquid passages being approximately parallel to one another and being disposed in a plane; a liquid chamber in fluid communication with said plurality of liquid passages, said liquid chamber containing the ink to be supplied to said liquid passages; an inlet for supplying the ink to said liquid chamber, wherein said ejection outlets, said liquid passage and said liquid chamber are arranged in this order from one end of said ink jet recording head, and said liquid chamber having a first slanted inner surface extending from said inlet to said liquid passages, a second slanted inner surface and a third slanted inner surface extending from said inlet laterally with respect to a direction in which said passages extend and continuously from said first slanted surface, and having a region, disposed between said liquid passages and said first slanted portion, for suppressing movement of the bubble toward the liquid passages; and an ink container for containing the ink to be supplied to said inlet of said recording head.

Claim 32

Dependent Claim 28 words

An ink jet recording cartridge according to claim 28, wherein said ink container accommodates an ink absorbing material and is provided with a rib on its inner side.

Claim 33

Dependent Claim 35 words

An ink jet recording cartridge according to claim 28, wherein said first, said second and said third slanted surfaces are inclined relative to a plane of said substrate at a converging angle of 5-40 degrees.

Annuity Stage	Window Opens	Payment Deadline	Surcharge Period Until	Estimated Fee	Status
3.5 Years (Year 4)	2003-09-05	2004-03-06	2004-09-05	$2000.00	Window Closed / Lapsed
7.5 Years (Year 8)	2007-09-05	2008-03-06	2008-09-05	$3760.00	Window Closed / Lapsed
11.5 Years (Year 12)	2011-09-05	2012-03-06	2012-09-05	$7700.00	Window Closed / Lapsed

Ink jet recording head with ink chamber having slanted surfaces to aid bubble removal

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