Patent US4751584A successfully refreshed from Google Patents.
US4751584A
Expired / Lapsed
US
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Display-reproducing apparatus
Assignee: TOYO POLYMER Co Ltd 8-1 NISHIGAHARA 1-CHOME KITA-KU TOKYO JAPAN
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Filing: 1986-09-18
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Granted: 1988-06-14
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Expires: 2006-09-18
Abstract
Abstract A display-reproducing apparatus comprises a display board, a reading means for reading information displayed on the board and a reproducing device for reproducing the information read by the reading means, wherein the board is so formed that written information by a writing means and a projected image can be displayed on the surface, and the written information is erasable, and the reading means is capable of reading both the written information and the projected image by scanning a surface of the board.
Inventors
- 👤 Yoshio Midorikawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 18:10
CPC Classifications
H; H04; H04N; H04N1/00; H04N1/00127; H04N1/00249; H04N1/00267; B; B43; B43L; B43L1/00; B43L1/004; H04N1/04; H04N1/10; H04N1/1013; H04N1/1017; H04N1/1039; H04N1/1043; H04N1/19; H04N1/191; H04N1/192; H04N1/193; H04N2201/00; H04N2201/04; H04N2201/0402; H04N2201/0438
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
87 words
A display-reproducing apparatus comprising: a display board; a reading means for reading information displayed on the board; and a reproducing device for reproducing the information read by the reading means, wherein said board is formed such that both written information by a writing means and a projected image can be displayed simultaneously on the board with the written information being erasable, and said reading means is selectively capable of reading either the written information and the projected image or both by scanning a surface of the board.
Claim 2
Dependent Claim
87 words
A display-reproducing apparatus comprising: a display board; a reading means for reading information displayed on the board; and a reproducing device for reproducing the information read by the reading means, wherein said board is formed such that both written information by a writing means and a projected image can be displayed simultaneously on the board with the written information being erasable, and said reading means is selectively capable of reading either the written information and the projected image or both by scanning a surface of the board.
Claim 3
Dependent Claim
39 words
The display-reproducing apparatus according to claim 1, wherein the reading means scans the surface of the board on which the information is to be written by the writing means and the projected image is given from the opposite side.
Claim 4
Dependent Claim
35 words
The display-reproducing apparatus according to claim 2, wherein the display board has a layer which allows a part of incident light to pass through and causes irregular reflection to the other part of the light.
Claim 5
Dependent Claim
24 words
The display-reproducing apparatus according to claim 3, wherein the display board is formed by laminating a transparent body and sheets of paper or cloth.
Claim 6
Dependent Claim
26 words
The display-reproducing apparatus according to claim 3, wherein the display board is a transparent body having a surface which is provided with minute projections and recesses.
Claim 7
Dependent Claim
29 words
The display-reproducing apparatus according to claim 3, wherein the display board is a transparent body having at least one surface to which a printing or coating layer is formed.
Claim 8
Dependent Claim
16 words
The display-reproducing apparatus according to claim 3, wherein the display board has a light diffusing layer.
Claim 9
Dependent Claim
26 words
The display-reproducing apparatus according to claim 3, wherein the surface of the display board to be written by the writing means is formed of fluorocarbon resin.
Claim 10
Dependent Claim
27 words
The display-reproducing apparatus according to claim 2, wherein a reflection plate is placed at the opposite side of the surface to be written by the writing means.
Claim 11
Dependent Claim
25 words
The display-reproducing apparatus according to claim 9, wherein the reflection plate is inclined by 45 degrees with respect to the surface of the display board.
Claim 12
Dependent Claim
46 words
The display-reproducing apparatus according to claim 1, wherein the reading means scans the surface of the display board on which the information is to be written by the writing means and the project image is given from the same side as the surface to be written.
Claim 13
Dependent Claim
24 words
The display-reproducing apparatus according to claim 1, wherein the reading means is a sensor at each side of the surfaces of the display board.
Claim 14
Dependent Claim
44 words
The display-reproducing apparatus according to claim 1, wherein the reading means scans the surface opposite the surface on which the information is to be written by the writing means, and the projected image is given from the side of the surface to be written.
Claim 15
Dependent Claim
64 words
The display-reproducing apparatus according to claim 3, the display board is formed of a transparent or a semi-transparent plate body and an opaque plate body which is placed by the opposite side of the surface to be written by the writing means, and the reading means is moved between the both plate bodies to read the information on the transparent or semi-transparent plate body.
Claim 16
Dependent Claim
35 words
The display-reproducing apparatus according to claim 13, wherein the display board has a layer which allows a part of incident light to pass through and causes irregular reflection to the other part of the light.
Claim 17
Dependent Claim
16 words
The display-reproducing apparatus according to claim 15, wherein the display board has a light diffusing layer.
Claim 18
Dependent Claim
26 words
The display-reproducing apparatus according to claim 15, wherein the surface of the display board to be written by the writing means is formed of fluorocarbon resin.
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) | 1991-06-14 | 1991-12-14 | 1992-06-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-06-14 | 1995-12-14 | 1996-06-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-06-14 | 1999-12-14 | 2000-06-14 | $7700.00 | Window Closed / Lapsed |