US5259873A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hot melt ink used for ink jet printer
Assignee: Brother Industries Ltd
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Filing: 1992-04-06
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Granted: 1993-11-09
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Expires: 2012-04-06
Abstract
Abstract In a hot melt ink of the present invention, a paraffin wax and an ethylene-vinyl acetate copolymer are heated and melted, and a carbon black is added therein and is dispersed with its diameter of substantially 1-30 mu m. In a dot printed with this hot melt ink, the area of the recorded dot is smaller than the area of the printed dot, and it is possible to print the dot in a high density. Therefore, the hot melt ink of the present invention excels in a color fastness to heat, a color fastness to light, and a color permanence, and a dot image having higher density can be printed.
Inventors
- 👤 Masaya Fujioka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 22:32
CPC Classifications
C; C09; C09D; C09D11/00; C09D11/30; C09D11/34; B; B41; B41J; B41J2/00; B41J2/005; B41J2/01; B41J2/17; B41J2/175; B41J2/17593
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
83 words
A hot melt ink for an ink jet printer for forming a print dot with a liquid ink made by heating and melting a solid ink, comprising: a vehicle which is solid at a room temperature and which is liquid at an ink jet temperature higher than the room temperature, said vehicle comprising a saturated hydrocarbon compound; and a pigment having a particle diameter of 1-30 μm, said pigment agglomerating at a center of the print dot as the vehicle cools and solidifies.
Claim 2
Dependent Claim
83 words
A hot melt ink for an ink jet printer for forming a print dot with a liquid ink made by heating and melting a solid ink, comprising: a vehicle which is solid at a room temperature and which is liquid at an ink jet temperature higher than the room temperature, said vehicle comprising a saturated hydrocarbon compound; and a pigment having a particle diameter of 1-30 μm, said pigment agglomerating at a center of the print dot as the vehicle cools and solidifies.
Claim 3
Dependent Claim
16 words
The hot melt ink as claimed in claim 1, wherein said vehicle comprises a paraffin wax.
Claim 4
Dependent Claim
16 words
The hot melt ink as claimed in claim 1, wherein said vehicle comprises a microcrystalline wax.
Claim 5
Dependent Claim
16 words
The hot melt ink as claimed in claim 1, wherein said pigment comprises an organic pigment.
Claim 6
Dependent Claim
16 words
The hot melt ink as claimed in claim 1, wherein said pigment comprises an inorganic pigment.
Claim 7
Dependent Claim
16 words
The hot melt ink as claimed in claim 1, wherein said pigment comprises a carbon black.
Claim 8
Dependent Claim
34 words
The hot melt ink as claimed in claim 1, further comprising at least one additive selected from a group consisting of a dispersion adjustor, a viscosity adjustor, a melting point adjustor, and a tackifier.
Claim 9
Independent Claim
61 words
A method of manufacturing a hot melt ink, comprising the steps of: heating a solvent and an adhesive to make a mixed solution thereof, said mixed solution comprising a saturated hydrocarbon compound; adding a pigment to said mixed solution; and crushing said pigment into particles which each have a diameter of 1-30 μm to disperse the particles in said mixed solution.
Claim 10
Independent Claim
61 words
A method of manufacturing a hot melt ink, comprising the steps of: heating a solvent and an adhesive to make a mixed solution thereof, said mixed solution comprising a saturated hydrocarbon compound; adding a pigment to said mixed solution; and crushing said pigment into particles which each have a diameter of 1-30 μm to disperse the particles in said mixed solution.
Claim 11
Dependent Claim
22 words
The method as claimed in claim 8, further comprising a step of solidifying said mixed solution in which said pigment is dispersed.
Claim 12
Dependent Claim
26 words
The method as claimed in claim 9, wherein said step of solidifying said mixed solution comprises a step of pouring said mixed solution into a mold.
Claim 13
Dependent Claim
33 words
The method as claimed in claim 9, further comprising a step of removing from the mold said solidified mixed solution which has been poured into said mold to form said hot melt ink.
Claim 14
Dependent Claim
26 words
The method as claimed in claim 8, wherein said step of heating includes using as said solvent one of a paraffin wax and a microcrystalline wax.
Claim 15
Dependent Claim
21 words
The method as claimed in claim 8, wherein said step of heating includes using as said adhesive an ethylene-vinyl acetate copolymer.
Claim 16
Dependent Claim
20 words
The method as claimed in claim 8, wherein said step of adding includes adding a carbon black as said pigment.
Claim 17
Dependent Claim
49 words
The method as claimed in claim 8, wherein said step of heating to make a mixed solution includes heating the solvent and the adhesive to form a vehicle which is solid at a room temperature and which is liquid at an ink jet temperature higher than the room temperature.
Claim 18
Dependent Claim
19 words
The method as claimed in claim 8, wherein said step of adding the pigment includes adding an organic pigment.
Claim 19
Dependent Claim
19 words
The method as claimed in claim 8, wherein said step of adding the pigment includes adding an inorganic pigment.
Claim 20
Dependent Claim
34 words
The method as claimed in claim 8, further comprising the step of adding an additive selected from a group consisting of a dispersion adjustor, a viscosity adjustor, a melting point adjustor and a tackifier.
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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) | 1996-11-08 | 1997-05-10 | 1997-11-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-11-08 | 2001-05-10 | 2001-11-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-11-08 | 2005-05-10 | 2005-11-09 | $7700.00 | Window Closed / Lapsed |