US5001104A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat-sensitive recording material
Assignee: New Oji Paper Co Ltd
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Filing: 1989-08-14
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Granted: 1991-03-19
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Expires: 2009-08-14
Abstract
Abstract A heat-sensitive recording material in which a heat-sensitive recording layer containing a colorless to light-colored basic Leuco dyestuff and a color developer is tightly contacted with a thermal head to effect color development, characterized in that ammonium zirconyl carbonate is contained in said heat-sensitive color-developing layer or in an undercoating layer so as to offer a heat-sensitive recording material which is superior in its high speed printing properties and free from printing hindrances caused by smudge deposition or sticking.
Inventors
- 👤 Yasuyoshi Morita
- 👤 Masaaki Matsuoka
- 👤 Satoshi Fukui
- 👤 Kyoko Koyabu
- 👤 Tatsuya Murata
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 22:18
CPC Classifications
B; B41; B41M; B41M5/00; B41M5/26; B41M5/40; B41M5/42; B41M5/426; B41M5/30; B41M5/337; B41M5/3377
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
60 words
A heat-sensitive recording material comprising a substrate sheet and a heat-sensitive recording layer on said substrate sheet containing a colorless to light-colored basic Leuco dyestuff and a color developer which is able to effect color development by direct contact of the recording layer with a thermal head, characterized in that ammonium zirconyl carbonate is contained in said heat-sensitive color-developing layer.
Claim 2
Dependent Claim
60 words
A heat-sensitive recording material comprising a substrate sheet and a heat-sensitive recording layer on said substrate sheet containing a colorless to light-colored basic Leuco dyestuff and a color developer which is able to effect color development by direct contact of the recording layer with a thermal head, characterized in that ammonium zirconyl carbonate is contained in said heat-sensitive color-developing layer.
Claim 3
Dependent Claim
49 words
A heat-sensitive recording material according to claim 1 wherein said ammonium zirconyl carbonate is present in an amount sufficient to reduce smudge deposition and sticking between the heat-sensitive recording layer and the thermal head when said heat sensitive layer is contacted with said thermal head during a recording step.
Claim 4
Dependent Claim
14 words
A heat-sensitive recording material according to claim 2 on which the substrate is paper.
Claim 5
Dependent Claim
67 words
A heat-sensitive recording material comprising a substrate sheet, an undercoating layer formed on the substrate sheet and a heat-sensitive recording layer on said undercoating layer containing a colorless to light-colored basic Leuco dyestuff and a color developer which is able to effect color development by direct contact of the recording layer with a thermal head, characterized in that ammonium zirconyl carbonate is contained in said undercoating layer.
Claim 6
Dependent Claim
67 words
A heat-sensitive recording material comprising a substrate sheet, an undercoating layer formed on the substrate sheet and a heat-sensitive recording layer on said undercoating layer containing a colorless to light-colored basic Leuco dyestuff and a color developer which is able to effect color development by direct contact of the recording layer with a thermal head, characterized in that ammonium zirconyl carbonate is contained in said undercoating layer.
Claim 7
Dependent Claim
49 words
A heat-sensitive recording material according to claim 4 wherein said ammonium zirconyl carbonate is present in an amount sufficient to reduce smudge deposition and sticking between the heat-sensitive recording layer and the thermal head when said heat sensitive layer is contacted with said thermal head during a recording step.
Claim 8
Dependent Claim
14 words
A heat-sensitive recording material according to claim 5 on which the substrate is paper.
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) | 1994-03-18 | 1994-09-17 | 1995-03-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-03-18 | 1998-09-17 | 1999-03-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-03-18 | 2002-09-17 | 2003-03-19 | $7700.00 | Window Closed / Lapsed |