EP0610096A2
Expired / Lapsed
EP
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Ink jet recording apparatus
Assignee: Canon Inc
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Filing: 1994-02-04
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Granted: —
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Expires: 2014-02-04
Abstract
Abstract An ink jet recording apparatus uses a recording head having discharge ports to discharge ink, and records by discharging ink from the recording head while enabling said recording head to travel in the direction of main scan. This apparatus comprises a recording head which is provided integrally with a plurality of recording units having a plurality of discharge port arrays for discharging ink of different colors, respectively, and then, the plurality of recording units are arranged in the direction of main scan to discharge ink of different densities, respectively. With the structure thus arranged, the recording in all the colors is not executed at a time thus making it possible to obtain an excellent image with a lesser deterioration of image due to ink blur and the like.
Inventors
- 👤 Yuji C/O Canon Kabushiki Kaisha Akiyama
- 👤 Hiromitsu C/O Canon Kabushiki Kaisha Hirabayashi
- 👤 Toshio C/O Canon Kabushiki Kaisha Kashino
- 👤 Hitoshi C/O Canon Kabushiki Kaisha Sugimoto
- 👤 Miyuki C/O Canon Kabushiki Kaisha Matsubara
- 👤 Fumihiro C/O Canon Kabushiki Kaisha Gotoh
- 👤 Hidehiko C/O Canon Kabushiki Kaisha Kanda
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-28 07:13
CPC Classifications
B; B41; B41J; B41J2/00; B41J2/005; B41J2/01; B41J2/21; B41J2/2121; B41J2/2125; B41J2/205; B41J2/2056
Claims Analysis
Total Claims: 27
Claim 1
Independent Claim
88 words
An ink jet recording apparatus which uses a recording head having discharge ports to discharge ink, and records by discharging ink from the recording head while enabling said recording head to travel in the direction of main scan, comprising: said recording head provided with a plurality of recording units having a plurality of discharge port arrays for discharging ink of different colors, respectively, wherein said plurality of recording units are arranged in said direction of main scan, and at the same time, discharge ink of different densities, respectively.
Claim 2
Dependent Claim
42 words
An ink jet recording apparatus according to claim 1, wherein the discharge port numbers of discharge port array for a given color are arranged more than the discharge port numbers of discharge port arrays for the other colors for said recording head.
Claim 3
Dependent Claim
57 words
An ink jet recording apparatus according to claim 1, wherein each of said plurality of discharge port arrays for discharging ink of different colors is arranged so that a part of said discharge port array is superposed with a part of the other discharge port arrays in the direction which differs from said direction of main scan.
Claim 4
Dependent Claim
46 words
An ink jet recording apparatus according to claim 1, wherein each of said plurality of discharge port arrays for discharging ink of different colors is arranged with the other discharge port arrays at given intervals in the direction which differs from said direction of main scan.
Claim 5
Dependent Claim
61 words
An ink jet recording apparatus according to claim 1, further comprising: recovery means to cover said plurality of recording units for recovering said discharge port arrays, wherein said recovery means enables said recording head and said recovery means to move correlatively at the time of operating said recovery in order to provide a space between said recording head and recovery means.
Claim 6
Dependent Claim
64 words
An ink jet recording apparatus which uses a recording head having discharge ports to discharge ink, and records by discharging ink from the recording head while enabling said recording head to travel in the direction of main scan, comprising: said recording head provided integrally with a plurality of recording units having a plurality of discharge port arrays for discharging ink of different densities, respectively.
Claim 7
Dependent Claim
52 words
An ink jet recording apparatus according to claim 6, wherein said recording head is provided integrally with a plurality of recording units in which a plurality of discharge port arrays for discharging ink of different densities, respectively, are arranged in the direction which is substantially orthogonal to said direction of main scan.
Claim 8
Dependent Claim
21 words
An ink jet recording apparatus according to claim 7, wherein said plurality of recording units discharge ink of different colors, respectively.
Claim 9
Dependent Claim
43 words
An ink jet recording apparatus according to claim 6, wherein said recording head arranges below the receding head the discharge port arrays which discharge ink of a high density among said plurality of discharge port arrays for discharging ink of different densities, respectively.
Claim 10
Dependent Claim
57 words
An ink jet recording apparatus according to claim 6, wherein each of said plurality of discharge port arrays for discharging ink of different densities is arranged so that a part of said discharge port array is superposed with a part of the other discharge port arrays in the direction which differs from said direction of main scan.
Claim 11
Dependent Claim
46 words
An ink jet recording apparatus according to claim 6, wherein each of said plurality of discharge port arrays for discharging ink of different densities is arranged with the other discharge port arrays at given intervals in the direction which differs from said direction of main scan.
Claim 12
Dependent Claim
61 words
An ink jet recording apparatus according to claim 6, further comprising: recovery means to cover said plurality of recording units for recovering said discharge port arrays, wherein said recovery means enables said recording head and said recovery means to move correlatively at the time of operating said recovery in order to provide a space between said recording head and recovery means.
Claim 13
Dependent Claim
180 words
An ink jet recording apparatus which uses a recording head having discharge ports to discharge ink, and records by discharging ink from the recording head while enabling said recording head to travel in the direction of main scan, comprising: said recording head which is a plurality of discharge port arrays having a plurality of discharge ports for discharging ink arranged in the direction different from said direction of main scan, and provided with a plurality of discharge port arrays arranged in the direction different from said direction of main scan for discharging ink of different densities, respectively, which are arranged in said direction of main scan per ink color, and all the pixels in an area recordable per main scan being thinned by said recording head in accordance with the thinning patterns which are in a complementary relationship with each other, and the image thus thinned being recorded with plural times of main scans by said recording head, and plural times of correlative movements of said recording head and a recording medium in the direction which differs from said scan.
Claim 14
Dependent Claim
181 words
An ink jet recording apparatus which uses a recording head having discharge ports to discharge ink, and records by discharging ink from the recording head while enabling said recording head to travel in the direction of main scan, comprising: said recording head which is a plurality of discharge port arrays having a plurality of discharge ports for discharging ink arranged in the direction different from said direction of main scan, and provided with a plurality of discharge port arrays arranged in the direction different from said direction of main scan for discharging ink of different colors, respectively, which are arranged in said direction of main scan per density of ink, and all the pixels in an area recordable per main scan being thinned by said recording head in accordance with the thinning patterns which are in a complementary relationship with each other, and the image thus thinned being recorded with plural times of main scans by said recording head, and plural times of correlative movements of said recording head and a recording medium in the direction which differs from said scan.
Claim 15
Dependent Claim
52 words
A recording head to discharge ink having a plurality of different densities, wherein the discharge port arrays are provided with said plurality of discharge ports arranged in a given direction, further comprising: said discharge port arrays being provided with a plurality of discharge port groups to discharge ink of different densities, respectively.
Claim 16
Dependent Claim
30 words
A recording head according to claim 15, wherein a plurality of said discharge port arrays are provided, and said plurality of discharge port arrays discharge ink of different colors, respectively.
Claim 17
Dependent Claim
63 words
A recording head to discharge ink having a plurality of different densities, wherein a plurality of said discharge ports are arranged in a given direction, and a plurality of discharge port arrays are provided with a plurality of discharge port groups to discharge ink of different colors, respectively, further comprising: a plurality of said discharge port arrays discharge ink of different densities, respectively.
Claim 18
Dependent Claim
126 words
An ink jet recording apparatus which uses a recording head capable of discharging plural ink having different densities, and forms an image by discharging ink to a recording medium while enabling said recording head to travel on the recording medium correlatively, comprising: ink discharge controlling means to form an image by forming the image with the discharge of ink of a desired density among the ink having said plural densities in a first scan of said recording head, and then, form the image with the discharge of ink of the density different from said desired density among the ink having said plural densities in the image area formed by use of the ink of said desired density in a second scan subsequent to said first scan.
Claim 19
Dependent Claim
51 words
An ink jet recording apparatus according to claim 18, further comprising: reciprocal recording means to record by enabling said recording head to reciprocally scan said recording medium correlatively, wherein said first scan is one scan of said reciprocal scans, and said second scan is the other scan of said reciprocal scans.
Claim 20
Dependent Claim
38 words
An ink jet recording apparatus according to claim 18, wherein said recording head is capable of discharging ink of plural colors, and is capable of discharging a plurality of ink having different densities for each of the colors.
Claim 21
Dependent Claim
131 words
An ink jet recording apparatus which uses a recording head capable of discharging plural ink having different densities, and forms an image by discharging ink on a recording medium comprising: reciprocal scanning means to enable said recording head to reciprocally scan the recording medium correlatively; recording head driving means to form an image by driving said recording head during the reciprocal scans by said reciprocal scanning means; and ink discharge controlling means to form an image to form the image by discharging ink of a desired density among the ink having said plural densities in a first reciprocal scans by said reciprocal scanning means, and form the image by discharging ink of the density which is different from said desired density in second reciprocal scans subsequent to said first reciprocal scans.
Claim 22
Dependent Claim
38 words
An ink jet recording apparatus according to claim 21, wherein said recording head is capable of discharging ink of plural colors, and is capable of discharging a plurality of ink having different densities for each of the colors.
Claim 23
Dependent Claim
20 words
An ink jet recording apparatus according to claim 18 or 21, further comprising: means for transmitting and/or reading image information.
Claim 24
Dependent Claim
18 words
An ink jet recording apparatus according to claim 21 or 23, further comprising: means for reading original images.
Claim 25
Dependent Claim
121 words
An ink jet recording method which uses a recording head capable of discharging plural ink having different densities, and forms an image by discharging ink to a recording medium while enabling said recording head to reciprocally scan the recording medium correlatively, comprising the following steps of: forming an image by discharging ink of a desired density along said ink of plural densities in one scan of said reciprocal scans; and forming the image by discharging ink of the density which is different from said desired density among the ink of said plural densities onto the image area formed by the ink of said density in the other scan of said reciprocal scans subsequent to the one scan of said reciprocal scans.
Claim 26
Dependent Claim
113 words
An ink jet recording method which uses a recording head capable of discharging plural ink having different densities, and forms an image by discharging ink to a recording medium while enabling said recording head to reciprocally scan the recording medium correlatively, comprising the following steps of: forming an image by discharging ink of a desired density among said ink of plural densities in a first reciprocal scans; and forming the image by discharging ink of the density which is different from said desired density among the ink of said plural densities onto the image area formed by the ink of said density in a second reciprocal scans subsequent to said first reciprocal scans.
Claim 27
Dependent Claim
47 words
An ink jet recording apparatus or recording head as claimed in any one of the preceding claims, characterised in that said recording head utilizes thermal energy to create air bubbles in ink, and discharges ink on the basis of the generation and development of said air bubbles.
References Cited (Backward Citations)
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