US5158924A
Expired / Lapsed
US
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Reversible thermosensitive recording material and image display method of using the same
Assignee: Ricoh Co Ltd
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Filing: 1991-09-13
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Granted: 1992-10-27
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Expires: 2011-09-13
Abstract
Abstract A reversible thermosensitive recording material is composed of a support and a reversible thermosensitive recording layer formed thereon, which is capable of recording and erasing images repeatedly by utilizing its property that the transparency can be changed reversibly from a transparent state to an opaque state, and vice versa, depending upon the temperature thereof. The reversible thermosensitive recording layer is composed of a reversible thermosensitive layer and a protective layer formed thereon and has a scratching intensity of 10 g or more and a coefficient of friction of 0.10 or less. Images are reversibly formed and erased on this reversible thermosensitive recording material.
Inventors
- 👤 Yukio Konagaya
- 👤 Yoshihiko Hotta
- 👤 Makoto Kawaguchi
- 👤 Toru Nogiwa
- 👤 Kunichika Morohoshi
- 👤 Akira Suzuki
- 👤 Fumihito Masubuchi
- 👤 Takao Igawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 13:31
CPC Classifications
B; B41; B41M; B41M5/00; B41M5/26; B41M5/40; B41M5/42; B41M5/36; B41M5/363; B41M5/30; B41M5/305; B41M5/423; B41M5/426; B41M5/44; B41M5/443; Y; Y10; Y10S; Y10S428/00; Y10S428/913; Y10T; Y10T428/00; Y10T428/31
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
76 words
A reversible thermosensitive recording material comprising a support and a reversible thermosensitive recording layer formed thereon, said reversible thermosensitive recording layer comprising a reversible thermosensitive layer which comprises an organic low-molecular weight material and a resin matrix and a protective layer which comprises a heat resistant resin formed thereon and the surface of said reversible thermosensitive thermal layer having a scratching intensity of 10 g or more and a coefficient of friction of 0.10 or less.
Claim 2
Dependent Claim
76 words
A reversible thermosensitive recording material comprising a support and a reversible thermosensitive recording layer formed thereon, said reversible thermosensitive recording layer comprising a reversible thermosensitive layer which comprises an organic low-molecular weight material and a resin matrix and a protective layer which comprises a heat resistant resin formed thereon and the surface of said reversible thermosensitive thermal layer having a scratching intensity of 10 g or more and a coefficient of friction of 0.10 or less.
Claim 3
Dependent Claim
23 words
The reversible thermosensitive recording material as claimed in claim 1, wherein said protective layer comprises a heat resistant resin and a lubricating additive.
Claim 4
Dependent Claim
22 words
The reversible thermosensitive recording material as claimed in claim 2, wherein said protective layer has a thickness of 0.1 to 30 μm.
Claim 5
Dependent Claim
52 words
The reversible thermosensitive recording material as claimed in claim 1, wherein said protective layer comprises a first protective layer comprising a heat resistant resin overlaid on said reversible thermosensitive layer, and a second protective layer comprising a heat resistant resin and a lubricating additive, which is overlaid on said first protective layer.
Claim 6
Dependent Claim
26 words
The reversible thermosensitive recording material as claimed in claim 4, wherein a printed portion is provided between said first protective layer and said second protective layer.
Claim 7
Dependent Claim
36 words
The reversible thermosensitive recording material as claimed in claim 4, wherein said first protective layer has a thickness of 0.1 to 20 μm, and said second protective layer has a thickness of 0.001 to 2.0 μm.
Claim 8
Dependent Claim
45 words
The reversible thermosensitive recording material as claimed in claim 1, wherein said heat resistant resin comprises an electron radiation curing resin component having a polyester skeleton with a branched molecular structure having 5 or more functional groups, and an electron radiation curing silicone-modified resin component.
Claim 9
Dependent Claim
36 words
The reversible thermosensitive recording material as claimed in claim 7, wherein said first protective layer has a thickness of 0.1 to 20 μm, and said second protective layer has a thickness of 0.001 to 2.0 μm.
Claim 10
Dependent Claim
19 words
The reversible thermosensitive recording material as claimed in claim 1, wherein said heat resistant resin is a phosphazene resin.
Claim 11
Dependent Claim
53 words
The reversible thermosensitive recording material as claimed in claim 1, wherein said protective layer comprises a first protective layer comprising a ultraviolet curing or electron radiation curing resin overlaid on said reversible thermosensitive layer, and a second protective layer comprising a silicone- or fluorine-containing resin, which is overlaid on said first protective layer.
Claim 12
Dependent Claim
26 words
The reversible thermosensitive recording material as claimed in claim 10, wherein a printed portion is provided between said first protective layer and said second protective layer.
Claim 13
Dependent Claim
36 words
The reversible thermosensitive recording material as claimed in claim 10, wherein said first protective layer has a thickness of 0.1 to 20 μm, and said second protective layer has a thickness of 0.001 to 2.0 μm.
Claim 14
Dependent Claim
25 words
The reversible thermosensitive recording material as claimed in claim 1, wherein a printed portion is provided between said reversible thermosensitive layer and said protective layer.
Claim 15
Dependent Claim
22 words
The reversible thermosensitive recording material as claimed in claim 1, wherein said protective layer has a thickness of 0.1 to 30 μm.
Claim 16
Dependent Claim
133 words
An image display method comprising the steps of reversibly recording images and erasing the recorded images on a reversible thermosensitive recording material comprising a support and a reversible thermosensitive recording layer formed thereon, said reversible thermosensitive recording layer comprising a reversible thermosensitive layer which comprises an organic low-molecular weight material and a resin matrix and a protective layer which comprises a heat resistant resin formed thereon and having a scratching intensity of 10 g or more and a coefficient friction of 0.10 or less, which is capable of recording and erasing images repeatedly by utilizing the property thereof that the transparency can be changed reversibly from a transparent state to an opaque state, and vice versa, depending upon the temperature thereof, with the application of heat thereto by use of a thermal head.
Claim 17
Dependent Claim
133 words
An image display method comprising the steps of reversibly recording images and erasing the recorded images on a reversible thermosensitive recording material comprising a support and a reversible thermosensitive recording layer formed thereon, said reversible thermosensitive recording layer comprising a reversible thermosensitive layer which comprises an organic low-molecular weight material and a resin matrix and a protective layer which comprises a heat resistant resin formed thereon and having a scratching intensity of 10 g or more and a coefficient friction of 0.10 or less, which is capable of recording and erasing images repeatedly by utilizing the property thereof that the transparency can be changed reversibly from a transparent state to an opaque state, and vice versa, depending upon the temperature thereof, with the application of heat thereto by use of a thermal head.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1995-10-27 | 1996-04-27 | 1996-10-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-10-27 | 2000-04-27 | 2000-10-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-10-27 | 2004-04-27 | 2004-10-27 | $7700.00 | Window Closed / Lapsed |