Patent US20120310352A1 successfully refreshed from Google Patents.
EP0510934A2
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EP
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Ink jet recording apparatus and method capable of performing high-speed recording
Assignee: Canon Inc
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Filing: 1992-04-22
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Granted: —
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Expires: 2012-04-22
Abstract
Abstract An ink is ejected at the same timing from ejection orifices in a number corresponding to an ink quantity 7% or less of an ink quantity ejected from all the ejection enabled ejection orifices of a plurality of ejection orifices of a recording head, and the ink ejection period from all the ejection enabled ejection orifices is set to be 70% or more of the driving period. Since the quantity of an ink ejected per unit time is minimized, and the negative pressure level generated in a common ink chamber can be set to be closest to normal pressure, the amplitude of a refill oscillation is minimized to stabilize ejection, and the driving frequency can be further increased.
Inventors
- 👤 Naoji C/O Canon Kabushiki Kaisha Ohtsuka
- 👤 Kentaro C/O Canon Kabushiki Kaisha Yano
- 👤 Kiichiro C/O Canon Kabushiki Kaisha Takahashi
- 👤 Atsushi C/O Canon Kabushiki Kaisha Arai
- 👤 Hitoshi C/O Canon Kabushiki Kaisha Nishikori
- 👤 Osamu C/O Canon Kabushiki Kaisha Iwasaki
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-23 07:42
CPC Classifications
B; B41; B41J; B41J2/00; B41J2/005; B41J2/01; B41J2/015; B41J2/04; B41J2/045; B41J2/04501; B41J2/04525; B41J2/04528; B41J2/04543; B41J2/04573; B41J2/0458; B41J2/135; B41J2/14; B41J2002/14362
Claims Analysis
Total Claims: 33
Claim 1
Independent Claim
125 words
An ink jet recording apparatus comprising: a recording head having a plurality of ejection orifices for ejecting an ink, and a common ink chamber for supplying the ink to said plurality of ejection orifices; and driving means for causing said plurality of ejection orifices of said recording head to eject the ink, and wherein said driving means causes the ejection orifices to eject the ink at the same timing, a number of the ejection orifices corresponding to an ink quantity not more than 7% of an ink quantity ejected from all the ejectable ones of said plurality of ejection orifices of said recording head, and sets an ink ejection period from all the ejectable orifices to be not less than 70% of a driving period.
Claim 2
Dependent Claim
21 words
An apparatus according to claim 1, wherein said driving means causes adjacent ejection orifices to eject the ink at continuous timings.
Claim 3
Dependent Claim
21 words
An apparatus according to claim 1, wherein said driving means inhibits adjacent ejection orifices from ejecting the ink at continuous timings.
Claim 4
Dependent Claim
23 words
An apparatus according to claim 1, wherein said driving means causes only one ejection orifice to eject the ink at a single timing.
Claim 5
Dependent Claim
29 words
An apparatus according to claim 1, wherein said driving means causes each ejection orifice to eject the ink at a maximum ejection pressure generation timing of the ejection orifice.
Claim 6
Dependent Claim
37 words
An apparatus according to claim 1, wherein said recording head causes a change in state including formation of a bubble in the ink by a heat energy, and ejects the ink based on the change in state.
Claim 7
Dependent Claim
122 words
An ink jet recording apparatus comprising: a recording head having at least 32 ejection orifices for ejecting an ink, and a common ink chamber for supplying the ink to said ejection orifices; and driving means for causing said ejection orifices of said recording head to eject the ink, and wherein said driving means causes the ejection orifices to eject the ink at the same timing, a number of the ejection orifices corresponding to an ink quantity not more than 15% of an ink quantity ejected from all the ejectable ones of said plurality of ejection orifices of said recording head, and sets an ink ejection period from the all the ejectable orifices to be not less than 90% of a driving period.
Claim 8
Dependent Claim
21 words
An apparatus according to claim 7, wherein said driving means causes adjacent ejection orifices to eject the ink at continuous timings.
Claim 9
Dependent Claim
21 words
An apparatus according to claim 7, wherein said driving means inhibits adjacent ejection orifices from ejecting the ink at continuous timings.
Claim 10
Dependent Claim
23 words
An apparatus according to claim 7, wherein said driving means causes only one ejection orifice to eject the ink at a single timing.
Claim 11
Dependent Claim
29 words
An apparatus according to claim 7, wherein said driving means causes each ejection orifice to eject the ink at a maximum ejection pressure generation timing of the ejection orifice.
Claim 12
Dependent Claim
37 words
An apparatus according to claim 7, wherein said recording head causes a change in state including formation of a bubble in the ink by a heat energy, and ejects the ink based on the change in state.
Claim 13
Dependent Claim
141 words
An ink jet recording apparatus comprising: a recording head having a plurality of ejection orifices for ejecting an ink, and a common ink chamber for supplying the ink to said plurality of ejection orifices through corresponding passages; and driving means for causing said plurality of ejection orifices of said recording head to eject the ink, and wherein said plurality of ejection orifices of said recording head are divided into a plurality of ejection orifice groups having at least one ejection orifice for ejecting the ink at substantially the same timings, and said driving means causes the next ejection orifice group to be subjected to ejection to eject the ink at a timing near a timing at which a meniscus of the ink in the previous ejection orifice group, which ejected the ink, reaches a maximum recess position in the corresponding passage.
Claim 14
Dependent Claim
60 words
An apparatus according to claim 13, wherein said driving means causes the next ejection orifice group to be subjected to ejection to eject the ink at a timing at which an ejection pressure is generated before the meniscus of the ink in the previous ejection orifice group, which ejected the ink, reaches the maximum recess position in the corresponding passage.
Claim 15
Dependent Claim
60 words
An apparatus according to claim 13, wherein said driving means causes at least one ejection orifice of the ejection orifice group to eject the ink at a first timing, and causes an ejection orifice next to the ejection orifice, which ejected the ink at the first timing via at least one orifice, to eject the ink at a second timing.
Claim 16
Dependent Claim
54 words
An apparatus according to claim 13, wherein said driving means causes only one ejection orifice of the ejection orifice group to eject the ink at a first timing, and causes only an ejection orifice neighboring the ejection orifice, which ejected the ink at the first timing, to eject the ink at a second timing.
Claim 17
Dependent Claim
54 words
An apparatus according to claim 13, wherein at least two of said plurality of ejection orifice groups have different numbers of ejection orifices, and said driving means drives said plurality of ejection orifice groups so as to decrease the number of ejection orifices to be subjected to ink ejection within a minimum driving period.
Claim 18
Dependent Claim
60 words
An apparatus according to claim 17, wherein said driving means causes the next ejection orifice group to be subjected to ejection to eject the ink at a timing at which an ejection pressure is generated before the meniscus of the ink in the previous ejection orifice group, which ejected the ink, reaches the maximum recess position in the corresponding nozzle.
Claim 19
Dependent Claim
36 words
An apparatus according to claim 13, wherein said driving means sets an ink ejection period from all the ejection enabled ejection orifices of said recording head to be not less than 70% of a driving period.
Claim 20
Dependent Claim
37 words
An apparatus according to claim 13, wherein said recording head causes a change in state including formation of a bubble in the ink by a heat energy, and ejects the ink based on the change in state.
Claim 21
Dependent Claim
156 words
An ink jet recording method comprising the steps of: providing a recording head having a plurality of discharging orifices for discharging an ink and a common ink chamber for supplying the ink to said plurality of discharging orifices through corresponding passages; dividing said plurality of discharging orifices of said recording head into a plurality of discharging orifice groups having at least one discharging orifice for discharging the ink at substantially the same timings; discharging the ink from a given one of said plurality of discharging orifice groups at substantially the same timings; and discharging, continuously with the discharging step from the given discharging orifice group, the ink from the next discharging orifice group to be subjected to discharging at substantially the same timings at a timing near a timing at which a meniscus of the ink in the given discharging orifice group, which discharged the ink previously, reaches a maximum recess position in the corresponding passage.
Claim 22
Dependent Claim
69 words
A method according to claim 21, wherein the continuous discharging step includes the step of discharging the ink from the next discharging orifice group to be subjected to discharging at substantially the same timings at a timing at which a discharging pressure is generated before the meniscus of the ink in the previous discharging orifice group, which discharged the ink, reaches a maximum recess position in the corresponding passage.
Claim 23
Dependent Claim
69 words
A method according to claim 21, wherein each of said discharging step and the continuous discharging step includes the step of discharging the ink from at least one discharging orifice of the discharging orifice group at a first timing, and discharging the ink from a discharging orifice next to the discharging orifice, which discharged the ink at the first timing via at least one orifice, at a second timing.
Claim 24
Dependent Claim
63 words
A method according to claim 21, wherein each of said discharging step and the continuous discharging step includes the step of discharging the ink from only one discharging orifice of the discharging orifice group at a first timing, and discharging the ink from only the discharging orifice neighboring the discharging orifice, which discharged the ink at the first timing, at a second timing.
Claim 25
Dependent Claim
68 words
A method according to claim 21, wherein at least two of said plurality of discharging orifice groups have different numbers of discharging orifices, and each of the discharging step and the continuous discharging step includes the step of discharging the ink from said plurality of discharging orifice groups so as to decrease the number of discharging orifices to be subjected to ink discharging in a minimum driving period.
Claim 26
Dependent Claim
69 words
A method according to claim 25, wherein the continuous discharging step includes the step of discharging the ink from the next discharging orifice group to be subjected to discharging at substantially the same timings at a timing at which a discharging pressure is generated before the meniscus of the ink in the previous discharging orifice group, which discharged the ink, reaches a maximum recess position in the corresponding passage.
Claim 27
Dependent Claim
47 words
A method according to claim 21, wherein each of the discharging step and the continuous discharging step includes the step of setting an ink discharging period from all the discharging enabled discharging orifices of said recording head to be not less than 70% of a driving period.
Claim 28
Dependent Claim
37 words
A method according to claim 21, wherein said recording head causes a change in state including formation of a bubble in the ink by a heat energy, and discharges an ink based on the change in state.
Claim 29
Dependent Claim
63 words
An ink jet recording apparatus comprising an array of ink ejection heads and means for energising the ejection heads at predetermined times, characterised in that the energising means is arranged to control the timings such that the timing interval between heads of the array is at least approximately harmonically or sub-harmonically related to the time of travel of the meniscus in each outlet.
Claim 30
Independent Claim
50 words
A method of driving an ink jet recording head comprising a plurality outlets, comprising sequentially driving the outlets at intervals which are harmonically or sub-harmonically related to the travel time of the meniscus in each outlet, so as to make use of a pressure wave in the head on driving.
Claim 31
Independent Claim
37 words
A method of operating an ink jet printer comprising limiting the number of nozzles thereof which attain maximum bubble generation pressure at the same time so as to converge oscillations in pressure in the ink supply thereto.
Claim 32
Independent Claim
58 words
A method of driving an ink jet printer which comprises a plurality of nozzles supplied from an ink supply and energised at different times, comprising controlling the energisation timings such that the pressure waves generated in the ink supply by energising each nozzle are subtractive so as to reduce the amplitude of pressure variations within the ink supply.
Claim 33
Dependent Claim
29 words
Use of reactive pressure waves propogating across an ink jet recording head in driving the nozzles of the head to limit the variation in meniscus size across the head.
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