US4895465A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thermal transfer ribbon especially for impressions on rough paper
Assignee: Pelikan Produktions AG
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Filing: 1987-10-15
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Granted: 1990-01-23
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Expires: 2007-10-15
Abstract
Abstract A thermocarbon ribbon is formed by emulsifying two mutually incompatible thermoplastic polymers melting at heat-transfer temperatures of a wax. The emulsion containing a pigment is applied to a ribbon support and the solvent is evaporated. The ribbon has multi-strike capabilities and improved sharpness of transfer to rough paper resulting from the presence in the solid continuous phase of beads or microspheres of a dispersed phase, both phases being formed by the polymers.
Inventors
- 👤 Norbert Mecke
- 👤 Heinrich Krauter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 05:23
CPC Classifications
B; B41; B41M; B41M5/00; B41M5/26; B41M5/382; B41M5/38207; B41J; B41J31/00; Y; Y10; Y10T; Y10T428/00; Y10T428/249921; Y10T428/249994; Y10T428/249995; Y10T428/249996
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
91 words
A thermal-transfer ribbon, comprising: a support strip; and a thermally transferable image-transfer layer on said support strip comprising a solid continuous phase in which a pigment is dispersed, a pigment-containing discontinuous phase consisting of solid beads of a polymer meltable during the thermal-transfer process and distributed in said continuous phase, said solid continuous phase being formed by at least in part a polymer different from and mutually incompatible with the polymer of said beads, and a wax substance selected from the group which consists of a wax and a waxlike material.
Claim 2
Dependent Claim
91 words
A thermal-transfer ribbon, comprising: a support strip; and a thermally transferable image-transfer layer on said support strip comprising a solid continuous phase in which a pigment is dispersed, a pigment-containing discontinuous phase consisting of solid beads of a polymer meltable during the thermal-transfer process and distributed in said continuous phase, said solid continuous phase being formed by at least in part a polymer different from and mutually incompatible with the polymer of said beads, and a wax substance selected from the group which consists of a wax and a waxlike material.
Claim 3
Dependent Claim
14 words
The thermal-transfer ribbon defined in claim 1 wherein said substance is an ester wax.
Claim 4
Dependent Claim
28 words
The thermal-transfer ribbon defined in claim 1 wherein the polymer of said beads is at least one polymer selected from the group consisting of polystyrenes, polyacrylates and polyamides.
Claim 5
Dependent Claim
33 words
The thermal-transfer ribbon defined in claim 1 wherein said polymer forming said solid continuous phase is at least one polymer selected from the group which consists of polyethylenevinylacetate, a polyvinylether and a polyvinylester.
Claim 6
Independent Claim
135 words
A method of making a thermal-transfer ribbon which comprises the steps of: forming a solution in a vaporizable solvent of two different mutually incompatible thermoplastic polymers which are meltable during a thermal transfer process to form a two-phase liquid/liquid phase-separation system in the solution; adding to said two-phase liquid/liquid phase-separation system with stirring at least one pigment and a wax to form a color emulsion in said solvent; coating said color emulsion onto a support strip; and evaporating said solvent from said color emulsion on said support strip to form a thermally transferrable image-transfer layer on said support strip comprising a solid continuous phase of one of said polymers in which said pigment is dispersed, and a pigment-containing discontinuous phase consisting of solid beads of the other of said polymers distributed in said continuous phase.
Claim 7
Independent Claim
135 words
A method of making a thermal-transfer ribbon which comprises the steps of: forming a solution in a vaporizable solvent of two different mutually incompatible thermoplastic polymers which are meltable during a thermal transfer process to form a two-phase liquid/liquid phase-separation system in the solution; adding to said two-phase liquid/liquid phase-separation system with stirring at least one pigment and a wax to form a color emulsion in said solvent; coating said color emulsion onto a support strip; and evaporating said solvent from said color emulsion on said support strip to form a thermally transferrable image-transfer layer on said support strip comprising a solid continuous phase of one of said polymers in which said pigment is dispersed, and a pigment-containing discontinuous phase consisting of solid beads of the other of said polymers distributed in said continuous phase.
Claim 8
Dependent Claim
13 words
The method defined in claim 5 wherein said wax is an ester wax.
Claim 9
Dependent Claim
13 words
The method defined in claim 5 wherein said solvent is an aromatic hydrocarbon.
Claim 10
Dependent Claim
11 words
The method defined in claim 7 wherein said solvent is toluol.
Claim 11
Dependent Claim
30 words
The method defined in claim 7 wherein said one of said polymers is at least one polymer selected from the group which consists of polyethylenevinylacetate, a polyvinylether and a polyvinylester.
Claim 12
Dependent Claim
27 words
The method defined in claim 7 wherein said other of said polymers is at least one polymer selected from the group consisting of polystyrenes, polyacrylates and polyamides.
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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) | 1993-01-22 | 1993-07-24 | 1994-01-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-01-22 | 1997-07-24 | 1998-01-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-01-22 | 2001-07-24 | 2002-01-23 | $7700.00 | Window Closed / Lapsed |