US6332919B2
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ink, ink set, ink cartridge, recording unit, image recording apparatus and image recording method
Assignee: Canon Inc
•
Filing: 2001-02-16
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Granted: 2001-12-25
•
Expires: 2021-02-16
Abstract
Abstract Provided is a black ink capable of mitigating the dependency on image quality of recording media and giving a high quality image stably, which comprises at least one salt selected from the group consisting of (M1) 2 SO 4 , CH 3 COO(M1), Ph_COO(M1), (M1)NO 3 , (M1)Cl, (M1)Br, (M1)I, (M1) 2 SO 3 and (M1) 2 CO 3 , where M1 is an alkali metal, ammonium or organo-ammonium and Ph is a phenyl group, and a self dispersible carbon black.
Inventors
- 👤 Koichi Osumi
- 👤 Yoshifumi Hattori
- 👤 Yoshihisa Takizawa
- 👤 Shinya Mishina
- 👤 Mikio Sanada
- 👤 Hisashi Teraoka
- 👤 Yuko Yakushigawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 22:39
CPC Classifications
C; C09; C09D; C09D11/00; C09D11/30; C09D11/38; B; B41; B41J; B41J2/00; B41J2/005; B41J2/01; C09D11/32; C09D11/324; C09D11/40
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
133 words
A process for alleviating bleeding between a black image and a color image adjoining each other on a recording medium, both of the images being formed on the recording medium by an ink jet process, comprising the steps of: (i) applying a black ink comprising a self-dispersing carbon black to an area where the black image is to be formed; and (ii) applying a color ink to an area where the color image is to be formed, wherein the black ink further contains at least one salt selected from the group consisting of (M1) 2 SO 4 , CH 3 COO(M1), Ph—COO(M1), (M1)NO 3 , (M1)Cl, (M1)Br, (M1)I, (M1) 2 SO 3 and (M1) 2 CO 3 , where M1 is an alkali metal, ammonium or organo-ammonium and Ph is a phenyl group.
Claim 2
Dependent Claim
133 words
A process for alleviating bleeding between a black image and a color image adjoining each other on a recording medium, both of the images being formed on the recording medium by an ink jet process, comprising the steps of: (i) applying a black ink comprising a self-dispersing carbon black to an area where the black image is to be formed; and (ii) applying a color ink to an area where the color image is to be formed, wherein the black ink further contains at least one salt selected from the group consisting of (M1) 2 SO 4 , CH 3 COO(M1), Ph—COO(M1), (M1)NO 3 , (M1)Cl, (M1)Br, (M1)I, (M1) 2 SO 3 and (M1) 2 CO 3 , where M1 is an alkali metal, ammonium or organo-ammonium and Ph is a phenyl group.
Claim 3
Dependent Claim
31 words
The process according to claim 1 , wherein the black ink has a first surface tension, and the color ink has a second surface tension smaller than the first surface tension.
Claim 4
Dependent Claim
18 words
The process according to claim 1 , wherein the step (i) is conducted prior to the step (ii).
Claim 5
Dependent Claim
31 words
The process according to claim 3 , wherein the step (ii) is conducted after solid-liquid separation has occurred in the black ink applied on the recording medium in the step (i).
Claim 6
Dependent Claim
39 words
The process according to claim 2 , wherein the step (i) and the step (ii) are conducted at such an interval that bleeding occurs between the black image and the color image unless the black ink contains the salt.
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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) | 2004-12-24 | 2005-06-25 | 2005-12-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2008-12-24 | 2009-06-25 | 2009-12-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2012-12-24 | 2013-06-25 | 2013-12-25 | $7700.00 | Window Closed / Lapsed |