US5158926A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reversible thermosensitive recording material
Assignee: Ricoh Co Ltd
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Filing: 1991-08-30
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Granted: 1992-10-27
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Expires: 2011-08-30
Abstract
Abstract A reversible thermosensitive recording material is composed of a support and a reversible thermosensitive recording layer formed on the support. The reversible thermosensitive recording layer includes a matrix resin and an organic low-molecular-weight material dispersed in the matrix resin, and has a temperature-dependent transparency. The matrix resin includes a resin component having a glass transition temperature of 90° C. or more.
Inventors
- 👤 Yoshihiko Hotta
- 👤 Makoto Kawaguchi
- 👤 Kunichika Morohoshi
- 👤 Yukio Konagaya
- 👤 Toru Nogiwa
- 👤 Akira Suzuki
- 👤 Fumihito Masubuchi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 10:04
CPC Classifications
B; B41; B41M; B41M5/00; B41M5/26; B41M5/36; B41M5/363; B41M5/30; B41M5/305; Y; Y10; Y10S; Y10S428/00; Y10S428/913
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
59 words
A reversible thermosensitive recording material comprising a support and a reversible thermosensitive recording layer formed on said support, said reversible thermosensitive recording layer comprising a matrix resin and an organic low-molecular-weight material dispersed in said matrix resin, and having a temperature-dependent transparency, said matrix resin comprising a resin component having a glass transition temperature of 90° C. or more.
Claim 2
Dependent Claim
59 words
A reversible thermosensitive recording material comprising a support and a reversible thermosensitive recording layer formed on said support, said reversible thermosensitive recording layer comprising a matrix resin and an organic low-molecular-weight material dispersed in said matrix resin, and having a temperature-dependent transparency, said matrix resin comprising a resin component having a glass transition temperature of 90° C. or more.
Claim 3
Dependent Claim
29 words
The reversible thermosensitive recording material as claimed in claim 1, wherein said matrix resin further comprises a resin component having a glass transition temperature of less than 90° C.
Claim 4
Dependent Claim
47 words
The reversible thermosensitive recording material as claimed in claim 2, wherein said resin component having a glass transition temperature of less than 90° C. comprises at least one component selected from the group consisting of a vinyl chloride copolymer, vinylidene chloride copolymer and a low-heat-resistant polyester resin.
Claim 5
Dependent Claim
29 words
The reversible thermosensitive recording material as claimed in claim 3, wherein said resin component having a glass transition temperature of less than 90° C. is a vinyl chloride copolymer.
Claim 6
Dependent Claim
50 words
The reversible thermosensitive recording material as claimed in claim 4, wherein said vinyl chloride copolymer is selected from the group consisting of vinyl chloride resin, vinyl chloride - vinyl acetate copolymer, vinyl chloride - vinyl acetate - vinyl alcohol copolymer, and vinyl chloride - vinyl acetate - maleic acid copolymer.
Claim 7
Dependent Claim
29 words
The reversible thermosensitive recording material as claimed in claim 3, wherein said resin component having a glass transition temperature of less than 90° C. is a vinylidene chloride copolymer.
Claim 8
Dependent Claim
36 words
The reversible thermosensitive recording material as claimed in claim 6, wherein said vinylidene chloride copolymer is selected from the group consisting of polyvinylidene chloride, vinylidene chloride - vinyl chloride copolymer, and vinylidene chloride - acrylonitrile copolymer.
Claim 9
Dependent Claim
29 words
The reversible thermosensitive recording material as claimed in claim 3, wherein said resin component having a glass transition temperature of less than 90° C. is a low-heat-resistant polyester resin.
Claim 10
Dependent Claim
38 words
The reversible thermosensitive recording material as claimed in claim 2, wherein the ratio by weight of said resin component having a glass transition temperature of 90° C. or more is at least 1 wt.% in said matrix resin.
Claim 11
Dependent Claim
58 words
The reversible thermosensitive recording material as claimed in claim 1, wherein said resin component having a glass transition temperature of 90° C. or more comprises at least one component selected from the group consisting of chlorinated vinyl chloride resin, phenoxy resin, styrene resin, polymethyl methacrylate, polydivinyl benzene, polycarbonate, polyvinyl formal, high-heat-resistant polyester, and copolymers of said resin components.
Claim 12
Dependent Claim
28 words
The reversible thermosensitive recording material as claimed in claim 1, further comprising a light reflection layer, which s interposed between said reversible thermosensitive recording layer and said support.
Claim 13
Dependent Claim
26 words
The reversible thermosensitive recording material as claimed in claim 11, further comprising an adhesive layer between said light reflection layer and said reversible thermosensitive recording layer.
Claim 14
Dependent Claim
21 words
The reversible thermosensitive recording material as claimed in claim 1, further comprising an overcoat layer on said reversible thermosensitive recording layer.
Claim 15
Dependent Claim
25 words
The reversible thermosensitive recording material as claimed in claim 13, further comprising an intermediate layer between said overcoat layer and said reversible thermosensitive recording layer.
References Cited (Backward Citations)
US4425161A
Cited
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 |