Patent EP0429010A2 successfully refreshed from Google Patents.
EP0429010A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Thermoreversible recording medium, apparatus utilizing the same and method for fabricating the same
Assignee: Oki Electric Industry Co Ltd
•
Filing: 1990-11-15
•
Granted: —
•
Expires: 2010-11-15
Abstract
Abstract A thermoreversible recording medium which permits reversible recording and erasure to be repeated by use of a heating means, such as a thermal head or a laser, and is used for example; for storage, display or printing of image or other information, comprises a matrix material and an organic substance of low molecular weight. The matrix material essentially consists of a copolymer of styrene and butadiene, and the organic substance is a saturated carboxylic acid. The saturated carboxylic acid may preferabiy be capric acid, lauric acid, myristic acid, palmitic acid, stearic acid, arachic acid, behenic acid or lignoceric acid. These compounds are saturated carboxylic acids with 10 - 24 carbon atoms. The weight ratio between the matrix and the organic substance is set within 1:1 to 20:1.
Inventors
- 👤 Okabe C/O Oki Electric Ind. Co. Ltd. Yutaka
- 👤 Nishioka C/O Oki Electric Ind. Co. Ltd. Yoichi
- 👤 Kato C/O Oki Electric Ind. Co. Ltd. Hiroyo
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-07 04:23
CPC Classifications
B; B41; B41M; B41M5/00; B41M5/26; B41M5/36; B41M5/363; Y; Y10; Y10S; Y10S428/00; Y10S428/913; Y10S428/914; Y10S430/00; Y10S430/165; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31855; Y10T428/31931
Claims Analysis
Total Claims: 26
Claim 1
Independent Claim
53 words
A thermoreversible recording medium comprising a matrix material and an organic substance of low molecular weight, and having its transparency being changed depending on the thermal history, wherein said matrix material essentially consisting of a copolymer of styrene and butadiene, and said organic substance of low molecular weight is a saturated carboxylic acid.
Claim 2
Dependent Claim
53 words
A thermoreversible recording medium comprising a matrix material and an organic substance of low molecular weight, and having its transparency being changed depending on the thermal history, wherein said matrix material essentially consisting of a copolymer of styrene and butadiene, and said organic substance of low molecular weight is a saturated carboxylic acid.
Claim 3
Dependent Claim
22 words
The medium of claim 1, wherein said saturate carboxylic acid has 10 to 24 carbon atoms, and is dispersed, in the matrix.
Claim 4
Dependent Claim
26 words
The medium of claim 1, wherein the weight ratio between the matrix and the organic substance of low molecular weight is set within 1:1 to 20:1.
Claim 5
Dependent Claim
57 words
A thermoreversible optical recording medium comprising a recording layer of a matrix material and an organic substance of low molecular weight, and a heat generating layer which absorbs light to generate heat; said matrix material essentially consisting of a copolymer of styrene and butadiene, and said organic substance of low molecular weight being a saturated carboxylic acid.
Claim 6
Dependent Claim
57 words
A thermoreversible optical recording medium comprising a recording layer of a matrix material and an organic substance of low molecular weight, and a heat generating layer which absorbs light to generate heat; said matrix material essentially consisting of a copolymer of styrene and butadiene, and said organic substance of low molecular weight being a saturated carboxylic acid.
Claim 7
Dependent Claim
21 words
The thermoreversible optical recording medium of claim 4, wherein said recording layer contains the substance whicj, absorbs light to generate heat.
Claim 8
Dependent Claim
22 words
The medium of claim 4, wherein said saturate carboxylic acid has 10 to 24 carbon atoms, and is dispersed in the matrix.
Claim 9
Dependent Claim
25 words
The medium of claim 4, wherein the weight ratio between a matrix and the organic substance of low molecular weight set within 1:1 to 20:1:
Claim 10
Dependent Claim
45 words
A thermoreversible optical recording medium comprising a matrix and a substance which comprises a substance which absorbs light to generate heat, wherein said matrix material comprises a copolymer of styrene and butadiene, and the organic substance of low molecular weight is a saturated carboxylic acid.
Claim 11
Dependent Claim
45 words
A thermoreversible optical recording medium comprising a matrix and a substance which comprises a substance which absorbs light to generate heat, wherein said matrix material comprises a copolymer of styrene and butadiene, and the organic substance of low molecular weight is a saturated carboxylic acid.
Claim 12
Dependent Claim
22 words
The medium of claim 8, wherein said saturate carboxylic acid has 10 to 24 carbon atoms, and is dispersed in the matrix.
Claim 13
Dependent Claim
26 words
The medium of claim 8, wherein the weight ratio between the matrix and the organic substance of low molecular weight is set within 1:1 to 20:1.
Claim 14
Dependent Claim
46 words
A thermoreversible display medium which comprises a colored support member, and a recording layer whose transparency varies according to its thermal history and which is provided on the support member, wherein said recording layer contains matrix material formed from styrene/butadiene copolymer, and a saturated carboxylic acid.
Claim 15
Dependent Claim
46 words
A thermoreversible display medium which comprises a colored support member, and a recording layer whose transparency varies according to its thermal history and which is provided on the support member, wherein said recording layer contains matrix material formed from styrene/butadiene copolymer, and a saturated carboxylic acid.
Claim 16
Dependent Claim
22 words
The medium of claim 11, wherein said saturate carboxylic acid has 10 to 24 carbon atoms, and is dispersed in the matrix.
Claim 17
Dependent Claim
26 words
The medium of claim 11, wherein the weight ratio between the matrix and the organic substance of low molecular weight is set within 1:1 to 20:1.
Claim 18
Dependent Claim
75 words
An image recording device which comprises a display medium using a material whose transparency varies according to its thermal history, a recording means to form an image on this medium, ,and an erasure means to erase the image formed on this medium, wherein said display medium comprises a colored support member, and a recording layer provided on the colored support member and comprising a matrix material formed from styrene/butadiene copolymer and a saturated carboxylic acid.
Claim 19
Dependent Claim
75 words
An image recording device which comprises a display medium using a material whose transparency varies according to its thermal history, a recording means to form an image on this medium, ,and an erasure means to erase the image formed on this medium, wherein said display medium comprises a colored support member, and a recording layer provided on the colored support member and comprising a matrix material formed from styrene/butadiene copolymer and a saturated carboxylic acid.
Claim 20
Dependent Claim
38 words
The image recording device according to claim 14, wherein the erasure means comprises a local erasure means to erase part only of the images on the display medium, and a full erasure means to erase all of them.
Claim 21
Independent Claim
63 words
A method of fabricating a thermoreversible recording mediw for use in an image forming comprising the steps of: a) preparing a mixture of a matrix component essentially consisting of a styrene-butadiene copolymer and an organic substance with low molecular weight which is a saturated carboxylic acid; and (b) coating a solution of the above mixture in an organic solvent on a support member.
Claim 22
Independent Claim
63 words
A method of fabricating a thermoreversible recording mediw for use in an image forming comprising the steps of: a) preparing a mixture of a matrix component essentially consisting of a styrene-butadiene copolymer and an organic substance with low molecular weight which is a saturated carboxylic acid; and (b) coating a solution of the above mixture in an organic solvent on a support member.
Claim 23
Dependent Claim
59 words
The method of claim 16, wherein said saturated carboxylic acid has 10 to 24 carbon atoms, and is dispersed in the matrix; and the weight ratio between the matrix and the organic substance of low molecular weight is set within 11 to 20:1; and a solution of the mixture in an organic solvent is coated on a support member.
Claim 24
Dependent Claim
128 words
An image forming apparatus comprising: (a) a means for charging the surface of a photosensitive member; (b) a means for conducting a thermal writing on a thermoreversible recording medium; (c) a means for conducting a whole-surface exposure, with the thermoreversible recording medium being superimposed with the photosensitive member; (d) a means for developing the toner image on the photesensitive member; (e) a means for transferring the toner image onto a recording medium, with the recording medium being superimposed with the photosensitive member; and (f) a means for fixing the toner image on the recording medium; wherein (g) said thermoreversible recording medium is a mixture of a matrix component essentially consisting of a styrene-butadiene copolymer and an organic substance of low molecular weight which is a saturated carboxylic acid.
Claim 25
Dependent Claim
128 words
An image forming apparatus comprising: (a) a means for charging the surface of a photosensitive member; (b) a means for conducting a thermal writing on a thermoreversible recording medium; (c) a means for conducting a whole-surface exposure, with the thermoreversible recording medium being superimposed with the photosensitive member; (d) a means for developing the toner image on the photesensitive member; (e) a means for transferring the toner image onto a recording medium, with the recording medium being superimposed with the photosensitive member; and (f) a means for fixing the toner image on the recording medium; wherein (g) said thermoreversible recording medium is a mixture of a matrix component essentially consisting of a styrene-butadiene copolymer and an organic substance of low molecular weight which is a saturated carboxylic acid.
Claim 26
Dependent Claim
59 words
The apparatus of claim 18, wherein said saturated carboxylic acid has 10 to 24 carbon atoms, and is dispersed in the matrix; and the weight ratio between the matrix and the organic substance of low molecular weight is set within 1:1 to 20:1; and a solution of the mixture in an organic solvent is coated on a support member.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
Maintenance schedule is calculated for granted US utility patents.