US4677445A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Recording method
Assignee: Canon Inc
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Filing: 1984-05-30
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Granted: 1987-06-30
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Expires: 2004-05-30
Abstract
Abstract A method for recording images on a recording material by ejection of recording liquid through fine nozzle or nozzles, characterized in that said recording liquid is a liquid composition containing therein water-soluble dyestuff, and that concentration of calcium ion in said liquid composition is adjusted to 10 ppm or below.
Inventors
- 👤 Masahiro Haruta
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 16:58
CPC Classifications
C; C09; C09D; C09D11/00; C09D11/30; C09D11/32; C09D11/328; C09B; C09B67/00; C09B67/0096
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
52 words
In an improved method for recording images on a recording material by ejection of recording liquid containing a water-soluble, calcium ion-contaminated dyestuff through one or more fine nozzles onto a recording medium, the improvement comprising: selecting and employing a recording liquid in which the calcium ion concentration is 3 ppm or less.
Claim 2
Dependent Claim
52 words
In an improved method for recording images on a recording material by ejection of recording liquid containing a water-soluble, calcium ion-contaminated dyestuff through one or more fine nozzles onto a recording medium, the improvement comprising: selecting and employing a recording liquid in which the calcium ion concentration is 3 ppm or less.
Claim 3
Dependent Claim
18 words
A method for recording images according to claim 1 wherein the recording liquid is an aqueous recording liquid.
Claim 4
Dependent Claim
24 words
A method for recording images according to claim 1 wherein the recording liquid is an aqueous recording liquid further containing a water-soluble organic solvent.
Claim 5
Dependent Claim
25 words
A method for recording images according to claim 1 wherein the recording liquid contains said dyestuff in an amount of 1 to 5 weight percent.
Claim 6
Dependent Claim
23 words
A method for recording images according to claim 1 wherein the recording liquid is ejected using an on-demand type ink jet recording system.
Claim 7
Dependent Claim
82 words
A process for forming a recording liquid suitable for ink jet recording and writing having a calcium ion concentration less than 3 ppm comprising; (a) dissolving a water-soluble calcium ion contaminated dyestuff capable of forming a recording liquid having a calcium ion concentration of more than 3 ppm in water to form a dye solution; (b) treating the dye solution to remove excess calcium ion contaminants; and (c) adding a water-soluble organic solvent to the dye solution to form the recording liquid.
Claim 8
Dependent Claim
82 words
A process for forming a recording liquid suitable for ink jet recording and writing having a calcium ion concentration less than 3 ppm comprising; (a) dissolving a water-soluble calcium ion contaminated dyestuff capable of forming a recording liquid having a calcium ion concentration of more than 3 ppm in water to form a dye solution; (b) treating the dye solution to remove excess calcium ion contaminants; and (c) adding a water-soluble organic solvent to the dye solution to form the recording liquid.
Claim 9
Dependent Claim
79 words
The process for forming a recording liquid according to claim 6 wherein the step of treating the dye solution to remove excess calcium ion concentration comprises: (i) adding sodium sulfate to an aqueous solution of the dyestuff to form a calcium precipitate; (ii) filtering the calcium precipitate from the aqueous dyestuff solution; (iii) washing the filtered aqueous dyestuff solution with a saturated aqueous solution of sodium sulfate and (iv) drying the washed dyestuff solution to form a refined dyestuff.
Claim 10
Dependent Claim
7 words
The recording liquid product of claim 7.
Claim 11
Dependent Claim
7 words
The recording liquid product of claim 6.
Claim 12
Dependent Claim
34 words
A process for forming a recording liquid suitable for ink jet recording and writing according to claim 6 wherein the recording liquid is to be ejected using an on-demand type ink jet recording system.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-06-29 | 1990-12-29 | 1991-06-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-06-29 | 1994-12-29 | 1995-06-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-06-29 | 1998-12-29 | 1999-06-30 | $7700.00 | Window Closed / Lapsed |