Patent EP0050479A1 successfully refreshed from Google Patents.
US4952942A
Expired / Lapsed
US
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Ink jet recording method with improved tone by recording yellow first
Assignee: Canon Inc
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Filing: 1989-03-22
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Granted: 1990-08-28
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Expires: 2009-03-22
Abstract
Abstract An ink jet recording method comprises using inks of two or more colors including yellow and forming a mixed color portion containing yellow on a recording medium by use of a plurality of inks with different dye concentrations for at least one color, wherein the yellow ink is attached onto the recording medium always prior to attachment of other inks thereonto.
Inventors
- 👤 Rieko Kanome
- 👤 Eiichi Suzuki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 22:06
CPC Classifications
B; B41; B41J; B41J2/00; B41J2/005; B41J2/01; B41J2/17; B41J2/175; B41J2/17566; B41J2/205; B41J2/2056; B41J2/21; B41J2/2107
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
133 words
An ink jet recording method, which comprises the steps of: using a yellow ink, a cyan ink and a magenta ink, provided that at least one of the yellow and cyan inks is provided in a plurality of dye concentrations; modulating the diameters of dots of the inks; and forming a mixed color portion on a recording medium, wherein the relationships between the diameters of ink dots (D μm) and that between the dye concentrations of inks (A wt%) satisfy the formulae: (D.sub.y /D.sub.Mn) or (D.sub.y /D.sub.Cn)<1 and (A.sub.y /A.sub.Mn) or (a.sub.y /A.sub.Cn)≧3 wherein Y denotes yellow ink, Mn denotes magenta ink of low dye concentration and Cn denotes cyan ink of low concentration, and the yellow ink is attached on the recording medium prior to the attachment of other color inks thereon.
Claim 2
Dependent Claim
133 words
An ink jet recording method, which comprises the steps of: using a yellow ink, a cyan ink and a magenta ink, provided that at least one of the yellow and cyan inks is provided in a plurality of dye concentrations; modulating the diameters of dots of the inks; and forming a mixed color portion on a recording medium, wherein the relationships between the diameters of ink dots (D μm) and that between the dye concentrations of inks (A wt%) satisfy the formulae: (D.sub.y /D.sub.Mn) or (D.sub.y /D.sub.Cn)<1 and (A.sub.y /A.sub.Mn) or (a.sub.y /A.sub.Cn)≧3 wherein Y denotes yellow ink, Mn denotes magenta ink of low dye concentration and Cn denotes cyan ink of low concentration, and the yellow ink is attached on the recording medium prior to the attachment of other color inks thereon.
Claim 3
Dependent Claim
28 words
An ink jet recording method according to claim 1, wherein the relationship between the dye concentration of inks (A) satisfies the following formula: (A.sub.y /A.sub.Mn) or (A.sub.y /A.sub.Cn)>3.5.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-08-27 | 1994-02-26 | 1994-08-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-08-27 | 1998-02-26 | 1998-08-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-08-27 | 2002-02-26 | 2002-08-28 | $7700.00 | Window Closed / Lapsed |