Patent EP0539157A2 successfully refreshed from Google Patents.
EP0539157A2
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EP
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Colour ink jet recording apparatus
Assignee: Canon Inc
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Filing: 1992-10-20
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Granted: —
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Expires: 2012-10-20
Abstract
Abstract The mounting positions of a plurality of recording heads (1Y, 1M, 1C, 1K) are set to be variable with respect to a paper feed direction, so that a post-ejection recording head (1Y) is mounted at the downstream side in the paper feed direction as compared to a pre-ejection recording head, thereby preventing generation of banding in color ink jet recording, and improving image quality.
Inventors
- 👤 Shigeyasu C/O Canon Kabushiki Kaisha Nagoshi
- 👤 Hiromitsu C/O Canon Kabushiki Kaisha Hirabayashi
- 👤 Yuji C/O Canon Kabushiki Kaisha Akiyama
- 👤 Hitoshi C/O Canon Kabushiki Kaisha Sugimoto
- 👤 Miyuki C/O Canon Kabushiki Kaisha Matsubara
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-04 14:34
CPC Classifications
B; B41; B41J; B41J2/00; B41J2/005; B41J2/01; B41J2/21; B41J2/2132; B41J2/2135
Claims Analysis
Total Claims: 25
Claim 1
Independent Claim
126 words
A color ink jet recording apparatus comprising: a plurality of recording heads, each having a plurality of ejection orifices aligned at a predetermined pitch, for forming a swath by ejecting different color inks from said plurality of ejection orifices; and image forming means for scanning said plurality of recording heads relative to a recording medium, and conveying said recording medium so as to sequentially form a color image by mixing the color inks, wherein the ink ejected from a post-ejection recording head of said plurality of recording heads is infiltrated and fixed while being shifted by not more than the predetermined pitch toward the downstream side in a convey direction of said the recording medium as compared to the ink ejected from a pre-ejection recording head.
Claim 2
Dependent Claim
33 words
An apparatus according to claim 1, wherein a recording width of the post-ejection recording head is set to be smaller than a recording width of the pre-ejection recording head, thereby shifting the ink.
Claim 3
Dependent Claim
53 words
An apparatus according to claim 2, wherein average ejection amounts set in units of said plurality of recording heads are set to be variable, so that the ejection amount of the post-ejection recording head is set to be smaller than the ejection amount of the pre-ejection recording head, thereby decreasing the recording width.
Claim 4
Dependent Claim
64 words
An apparatus according to claim 2, wherein ejection amount distributions in units of said plurality of recording heads are set to be variable, so that the ejection amount at upstream-side end portions, in the convey direction of said recording medium, of the post-ejection recording head is set to be smaller than the ejection amount of the pre-ejection recording head, thereby decreasing the recording width.
Claim 5
Dependent Claim
59 words
An apparatus according to claim 2, wherein mounting angles of said plurality of recording heads with respect to the convey direction of said recording medium are set to be variable, so that an inclination angle of the post-ejection recording head is set to be larger than an inclination angle of the pre-ejection recording head, thereby decreasing the recording width.
Claim 6
Dependent Claim
52 words
An apparatus according to claim 2, wherein ejection orifice pitches of said plurality of recording heads are set to be variable, so that the ejection orifice pitch of the post-ejection recording head is set to be smaller than the ejection orifice pitch of the pre-ejection recording head, thereby decreasing the recording width.
Claim 7
Dependent Claim
65 words
An apparatus according to claim 1, wherein ink landing positions on said recording medium in units of said plurality of recording heads are adjusted, so that the ink landing position of the post-ejection recording head is set at a downstream side in the convey direction of said recording medium as compared to the ink landing position of the pre-ejection recording head, thereby shifting the ink.
Claim 8
Dependent Claim
64 words
An apparatus according to claim 7, wherein mounting positions of said plurality of recording heads are set to be variable in the convey direction of said recording medium, so that the post-ejection recording head is mounted at the downstream side in the convey direction of said recording medium as compared to the mounting position of the pre-ejection head, thereby adjusting the ink landing position.
Claim 9
Dependent Claim
68 words
An apparatus according to claim 7, wherein carriage drive means is arranged, so that a carriage, which integrally holds said plurality of recording heads, and moves in the scan direction, during movement in the scan direction, inclines the post-ejection recording head at a larger angle toward the downstream side in the convey direction of said recording medium than the pre-ejection recording head, thereby adjusting the ink landing position.
Claim 10
Dependent Claim
32 words
An apparatus according to claim 1, wherein said plurality of recording heads are integrally formed or held to be aligned in a direction parallel to the convey direction of said recording medium.
Claim 11
Dependent Claim
32 words
An apparatus according to claim 1, wherein said plurality of recording heads are integrally formed or held to be aligned in a direction perpendicular to the convey direction of said recording medium.
Claim 12
Dependent Claim
37 words
An apparatus according to claim 1, wherein each of said plurality of recording heads causes a change in state in the ink by heat energy, and ejects the ink on the basis of the change in state.
Claim 13
Dependent Claim
111 words
A color ink jet recording method for forming an image on a recording medium by scanning a plurality of recording heads, each having a plurality of ejection orifices aligned at a predetermined pitch, for ejecting different color inks from said plurality of ejection orifices, comprising the steps of: forming a first swath by ejecting a first color ink onto said recording medium; and forming a second swath by ejecting a second color ink onto the first swath previously formed on said recording medium, the second swath being shifted from the first swath by not more than the predetermined pitch toward a downstream side in a convey direction of said recording medium.
Claim 14
Dependent Claim
42 words
A method according to claim 13, wherein a recording width of the recording head for forming the second swath is set to be smaller than a recording width of the recording head for forming the first swath, thereby shifting the second swath.
Claim 15
Dependent Claim
61 words
A method according to claim 14, wherein average ejection amounts set in units of said plurality of recording heads are set to be variable, so that the ejection amount of the recording head for forming the second swath is set to be smaller than the ejection amount of the recording head for forming the first swath, thereby decreasing the recording width.
Claim 16
Dependent Claim
72 words
A method according to claim 14, wherein ejection amount distributions in units of said plurality of recording heads are set to be variable, so that the ejection amount, at upstream-side end portions in the convey direction, of said recording medium of the recording head for forming the second swath is set to be smaller than the ejection amount of the recording head for forming the first swath, thereby decreasing the recording width.
Claim 17
Dependent Claim
67 words
A method according to claim 14, wherein mounting angles of said plurality of recording heads with respect to the convey direction of said recording medium are set to be variable, so that an inclination angle of the recording head for forming the second swath is set to be larger than an inclination angle of the recording head for forming the first swath, thereby decreasing the recording width.
Claim 18
Dependent Claim
60 words
A method according to claim 14, wherein ejection orifice pitches of said plurality of recording heads are set to be variable, so that the ejection orifice pitch of the recording head for forming the second swath is set to be smaller than the ejection orifice pitch of the recording head for forming the first swath, thereby decreasing the recording width.
Claim 19
Dependent Claim
74 words
A method according to claim 13, wherein ink landing positions on said recording medium in units of said plurality of recording heads are adjusted, so that the ink landing position of the recording head for forming the second swath is set at a downstream side in the convey direction of said recording medium as compared to the ink landing position of the recording head for forming the first swath, thereby shifting the second swath.
Claim 20
Dependent Claim
68 words
A method according to claim 19, wherein mounting positions of said plurality of recording heads are set to be variable in the convey direction of said recording medium, so that the recording head for forming the second swath is mounted at the downstream side in the convey direction of said recording medium as compared to the mounting position of the pre-ejection head, thereby adjusting the ink landing position.
Claim 21
Dependent Claim
76 words
A method according to claim 19, wherein carriage drive means is arranged, so that a carriage, which integrally holds said plurality of recording heads, and moves in the scan direction, during movement in the scan direction, inclines the recording head for forming the second swath at a larger angle toward the downstream side in the convey direction of said recording medium than the recording head for forming the first swath, thereby adjusting the ink landing position.
Claim 22
Dependent Claim
32 words
A method according to claim 13, wherein said plurality of recording heads are integrally formed or held to be aligned in a direction parallel to the convey direction of said recording medium.
Claim 23
Dependent Claim
32 words
A method according to claim 13, wherein said plurality of recording heads are integrally formed or held to be aligned in a direction perpendicular to the convey direction of said recording medium.
Claim 24
Dependent Claim
37 words
A method according to claim 13, wherein each of said plurality of recording heads causes a change in state in the ink by heat energy, and ejects the ink on the basis of the change in state.
Claim 25
Dependent Claim
59 words
A color ink jet recording apparatus having means to variably set the mounting positions of a plurality of recording heads so that a post-ejection recording head is mounted at the downstream side in the paper feed direction as compared to a pre-ejection recording head thereby preventing generation of banding in color ink jet recording and thus improving image quality.
References Cited (Backward Citations)
No citation records indexed.
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