Patent US4794102A successfully refreshed from Google Patents.
US4794102A
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US
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Thermally-responsive record material
Assignee: APPELETON PAPERS Inc
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Filing: 1987-09-03
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Granted: 1988-12-27
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Expires: 2007-09-03
Abstract
Abstract A high sensitivity thermal paper resistant to image erasure is disclosed. The thermal paper has a color-forming composition comprising a chromogenic material, an acidic developer material, a water insoluble polymer consisting of poly α-methylstyrene or α-methylstyrene/vinyltoluene copolymer, and a thermal modifier. Preferably the thermal modifier is selected from acetoacet-o-toluidine, diphenoxyethane, phenyl-1-hydroxy-2-naphthoate, diheptadecyl ketone and octadecanamide. The disclosed composition when thermally imaged is surprisingly resistant to image erasure and smearing attributable to fingerprint oils.
Inventors
- 👤 Thomas C. Petersen
- 👤 Dean G. Dalebroux
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 13:44
CPC Classifications
B; B41; B41M; B41M5/00; B41M5/26; B41M5/30; B41M5/337; B41M5/3375; Y; Y10; Y10S; Y10S428/00; Y10S428/913; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31855
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
92 words
A thermally-responsive record material resistant to image smearing comprising a support member bearing a thermally-sensitive color-forming composition, said thermally-sensitive color-forming composition comprising: a chromogenic material, and in contiguous relationship, an acidic developer material whereby the melting or sublimation of either material produces a change in color by reaction between the two, a water insoluble polymeric compound selected from the group consisting of poly α-methylstyrene and copolymer of α-methylstyrene/vinyltoluene, and in combination therewith, a thermal modifier selected from the group consisting of acetoacet-o-toluidine, diphenoxyethane, phenyl-1-hydroxy-2-naphthoate, diheptadecyl ketone, and octadecanamide, and a binder therefor.
Claim 2
Dependent Claim
92 words
A thermally-responsive record material resistant to image smearing comprising a support member bearing a thermally-sensitive color-forming composition, said thermally-sensitive color-forming composition comprising: a chromogenic material, and in contiguous relationship, an acidic developer material whereby the melting or sublimation of either material produces a change in color by reaction between the two, a water insoluble polymeric compound selected from the group consisting of poly α-methylstyrene and copolymer of α-methylstyrene/vinyltoluene, and in combination therewith, a thermal modifier selected from the group consisting of acetoacet-o-toluidine, diphenoxyethane, phenyl-1-hydroxy-2-naphthoate, diheptadecyl ketone, and octadecanamide, and a binder therefor.
Claim 3
Dependent Claim
12 words
The record material of claim 1 wherein the thermal modifier comprises acetoacet-o-toluidine.
Claim 4
Dependent Claim
12 words
A record material of claim 1 wherein the thermal modifier comprises diphenoxyethane.
Claim 5
Dependent Claim
12 words
The record material of claim 1 wherein the thermal modifier comprises phenyl-1-hydroxy-2-naphthoate.
Claim 6
Dependent Claim
13 words
The record material of claim 1 wherein the thermal modifier comprises diheptadecyl ketone.
Claim 7
Dependent Claim
12 words
The record material of claim 1 wherein the thermal modifier comprises octadecanamide.
Claim 8
Dependent Claim
20 words
The record material of claim 1 wherein the thermal modifier comprises 10-30% by weight of the thermally-sensitive color forming composition.
Claim 9
Dependent Claim
25 words
The record material of claim 1 wherein the water insoluble polymeric compound comprises 2 to 20% by weight of the thermally sensitive color forming composition.
Claim 10
Dependent Claim
20 words
The record material of claim 1 wherein the thermal modifier comprises 10-30% by weight of the thermally-sensitive color forming composition.
Claim 11
Dependent Claim
15 words
The record material of claim 1 wherein the acidic developer material is a phenol compound.
Claim 12
Dependent Claim
22 words
The record material of claim 10 in which the phenol compound is selected from the group consisting of 4,4'-isopropylindinediphenol, 2,2-bis(4-hydroxyphenyl)-4-methylpentane, and 2,2-bis(4-hydroxyphenyl)-5-methylhexane.
Claim 13
Dependent Claim
22 words
The record material of claim 1 in which the chromogenic material is selected from the group consisting of 3-diethylamino-6-methyl-7-anilinofluoran; and 3-diethylamino-7-(2-chloroanilino)fluoran; 3-(N-methylcyclohexylamino)-6-methyl-7-anilinofluoran.
Claim 14
Dependent Claim
24 words
The record material of claim 1 in which the binder is selected from the group consisting of polyvinyl alcohol, methylcellulose, methyl-hydroxypropylcellulose, starch, and hydroxyethylcellulose.
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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) | 1991-12-27 | 1992-06-27 | 1992-12-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-12-27 | 1996-06-27 | 1996-12-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-12-27 | 2000-06-27 | 2000-12-27 | $7700.00 | Window Closed / Lapsed |