EP0595658A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Ink jet recording apparatus
Assignee: Canon Inc
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Filing: 1993-10-29
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Granted: —
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Expires: 2013-10-29
Abstract
Abstract An ink jet recording apparatus discharges inks of three primary colors from three discharge port groups each having a plurality of discharge pots to record swaths of the respective colors on a recording medium and repeats the above step to complete a record. Joints of the swaths of Y, M and C colors are spaced from joints of swaths of other two colors by an equal distance, and the discharge port groups are offset from each other by 8n times of a discharge port pitch in a direction of the feed of the recording medium. <IMAGE>
Inventors
- 👤 Mineo C/O Canon Kabushiki Kaisha Kaneko
- 👤 Haruyuki C/O Canon Kabushiki Kaisha Matsumoto
- 👤 Yoshifumi C/O Canon Kabushiki Kaisha Hattori
- 👤 Yoichi c/o Canon Kabushiki Kaisha Tosaka
- 👤 Isao C/O Canon Kabushiki Kaisha Ebisawa
- 👤 Tadashi c/o Canon Kabushiki Kaisha Yamamoto
- 👤 Masashi C/O Canon Kabushiki Kaisha Miyagawa
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-04 22:37
CPC Classifications
B; B41; B41J; B41J2/00; B41J2/005; B41J2/01; B41J2/21; B41J2/2132; B41J2/135; B41J2/145; B41J2/15
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
140 words
An ink jet recording apparatus for discharging inks of at least three primary colors to repeatedly form swaths of respective colors on a recording medium to complete a record, comprising: at least three groups of discharge ports each having a plurality of discharge ports for discharging the inks of at least the three primary colors; and scan means for scanning said discharge port groups to the recording medium; said discharge port groups being spaced from each other by a distance L in a direction different from the scan direction by said scan means; said distance L between said discharge port groups being 8n (n is a positive integer) times of a discharge port pitch P and selected such that joints of swaths of each color are spaced from joints of swaths of other two colors by a substantially equal distance.
Claim 2
Dependent Claim
23 words
An ink jet recording apparatus according to Claim 1 wherein said discharge port groups and said discharge ports are arranged on one line.
Claim 3
Dependent Claim
39 words
An ink jet recording apparatus according to Claim 1 wherein said distance L is substantially equal to (3m-1)/3 or (3m-2)/3 of the width of each discharge port group (the number of discharge ports x the discharge port pitch P).
Claim 4
Dependent Claim
20 words
An ink jet recording apparatus according to Claim 1 wherein said discharge port groups are formed in one recording head.
Claim 5
Dependent Claim
73 words
An ink jet recording apparatus according to Claim 1 further comprising: a discharge port group having a plurality of discharge ports for discharging black ink other than said three primary colors; a distance L2 between said black discharge port group and the discharge port group of other color closest to said black discharge port group having the following relation with the distance L; L2 = L + 8KP (K is a positive integer).
Claim 6
Dependent Claim
38 words
An ink jet recording apparatus according to Claim 5 wherein the number of discharge ports of said black discharge port group is larger than the number of discharge ports of each of discharge port groups of other colors.
Claim 7
Dependent Claim
20 words
An ink jet recording apparatus according to Claim 6 wherein said discharge port groups are formed in one recording head.
Claim 8
Dependent Claim
23 words
An ink jet recording apparatus according to Claim 7 wherein said discharge port groups and said discharge ports are arranged on one line.
Claim 9
Dependent Claim
40 words
An ink jet recording apparatus according to Claim 1 further comprising: an image memory for storing image data corresponding to said discharge port groups; said image memory supplying image data to the corresponding discharge port groups on 8 bits basis.
Claim 10
Dependent Claim
24 words
An ink jet recording apparatus according to any one of Claims 1 to 9 wherein said discharge ports discharge inks by using thermal energy.
Claim 11
Dependent Claim
133 words
Amethod of ink jet recording by discharging inks of at least three primary colors to repeatedly form swaths of colors on a recording medium to complete a record, comprising the steps of: providing at least three discharge port groups each having a plurality of discharge ports for discharging the inks of at least three primary colors; said discharge port groups being arranged with a spacing L from each other with the distance L between the discharge port groups being 8n (n is a positive integer) times of a discharge port pitch P; scanning said discharge port groups to the recording medium in a direction different from the direction of arrangement of said discharge port groups; and supplying image data corresponding to said discharge port groups from an image memory on 8 bits basis.
Claim 12
Dependent Claim
25 words
A method of ink jet recording apparatus according to Claim 11 wherein said discharge port groups and said discharge ports are arranged on one line.
Claim 13
Dependent Claim
41 words
A method of ink jet recording apparatus according to Claim 11 wherein said distance L is substantially equal to (3m-1)/3 or (3m-2)/3 of the width of each discharge port group (the number of discharge ports x the discharge port pitch P).
Claim 14
Dependent Claim
21 words
A method of ink jet recording apparatus according to Claim 11 wherein said discharge port groups are arranged on one line.
Claim 15
Dependent Claim
24 words
An ink jet recording apparatus according to any one of Claims 11 to 14 wherein said discharge ports discharge inks by using thermal energy.
References Cited (Backward Citations)
No citation records indexed.
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