US5249000A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thermoreversible recording medium, apparatus utilizing the same and method for fabricating the same
Assignee: Oki Electric Industry Co Ltd
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Filing: 1992-04-10
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Granted: 1993-09-28
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Expires: 2012-04-10
Abstract
Abstract An image forming apparatus which permits reversible recording and erasure by a heating means, and permits storage, display, printing or reproduction of an image or other information. The present apparatus thermoreversibly records an image on a matrix material of a copolymer of styrene and butadiene and a low molecular weight, saturated carboxylic acid, preferably containing from 10 to 24 carbon atoms, and where the weight ratio of the matrix material to carboxylic acid is from 1:1 to 20:1.
Inventors
- 👤 Yutaka Okabe
- 👤 Yoichi Nishioka
- 👤 Hiroyo Kato
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 06:45
CPC Classifications
B; B41; B41J; B41J2/00; B41J2/435; B41J2/475; B41J2/4753; B41M; B41M5/00; B41M5/26; B41M5/28; B41M5/36; B41M5/363; Y; Y10; Y10S; Y10S428/00; Y10S428/913
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
124 words
An image forming apparatus comprising: a means for charging a surface of a photosensitive member; a means for thermally writing on a thermoreversible recording medium formed on a support member; a means for exposing said photosensitive member when said thermoreversible recording medium is superimposed on said photosensitive member; a means for developing a toner image on said photosensitive member; a means for transferring said toner image onto a second recording medium, when said second recording medium is superimposed on said photosensitive member; and a means for fixing said toner image onto said second recording medium; wherein said thermoreversible recording medium is a mixture consisting essentially of a matrix material which consists essentially of a copolymer of styrene and butadiene, and a saturated carboxylic acid.
Claim 2
Dependent Claim
124 words
An image forming apparatus comprising: a means for charging a surface of a photosensitive member; a means for thermally writing on a thermoreversible recording medium formed on a support member; a means for exposing said photosensitive member when said thermoreversible recording medium is superimposed on said photosensitive member; a means for developing a toner image on said photosensitive member; a means for transferring said toner image onto a second recording medium, when said second recording medium is superimposed on said photosensitive member; and a means for fixing said toner image onto said second recording medium; wherein said thermoreversible recording medium is a mixture consisting essentially of a matrix material which consists essentially of a copolymer of styrene and butadiene, and a saturated carboxylic acid.
Claim 3
Dependent Claim
57 words
The apparatus of claim 1, wherein said saturated carboxylic acid comprises 10 to 24 carbon atoms, and is dispersed in said matrix material; and the weight ratio between the said matrix and said saturated carboxylic acid is from 1:1 to 20:1; and a solution of said mixture in an organic solvent is coated on said support member.
Claim 4
Dependent Claim
18 words
The apparatus of claim 1, additionally comprising: a means for erasing an image on said thermoreversible recording medium.
Claim 5
Dependent Claim
16 words
The apparatus of claim 3, wherein said means for erasing is a means for localized erasure.
Claim 6
Dependent Claim
16 words
The apparatus of claim 3, wherein said means for erasing is a means for whole-surface erasure.
Claim 7
Dependent Claim
20 words
The apparatus of claim 1, wherein said means for exposing said photosensitive member exposes the entire surface of said member.
Claim 8
Dependent Claim
17 words
The apparatus of claim 1, wherein said saturated carboxylic acid comprises from 10 to 24 carbon atoms.
Claim 9
Dependent Claim
21 words
The apparatus of claim 1, wherein the ratio of said matrix material to said saturated carboxylic acid is 1:1 to 20:1.
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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) | 1996-09-27 | 1997-03-29 | 1997-09-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-09-27 | 2001-03-29 | 2001-09-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-09-27 | 2005-03-29 | 2005-09-28 | $7700.00 | Window Closed / Lapsed |