US4816873A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Imaging device
Assignee: Brother Industries Ltd
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Filing: 1987-10-26
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Granted: 1989-03-28
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Expires: 2007-10-26
Abstract
Abstract Disclosed is an imaging device wherein a latent image is formed by projecting an optical image on a photo and pressure sensitive recording sheet, on which a plurality of microcapsules enveloping photo-hardenable resins and chromogenic materials therein are coated, and a visible image is developed on a transfer sheet by pressurizing the recording sheet in superposed state with the transfer sheet, the transfer sheet being coated with color-developing agents which react with the chromogenic materials to develop the visible image. The disclosed imaging device comprises an exposing unit for exposing the recording sheet, which is arranged to extend over the entire width of the recording sheet, and a pressing unit for pressing the recording sheet and the transfer sheet in superposed state.
Inventors
- 👤 Naoyuki Hatta
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 18:34
CPC Classifications
G; G03; G03F; G03F7/00; G03F7/002; G03F7/0022; G03B; G03B27/00; G03B27/32; G03B2227/00; G03B2227/32; G03B2227/325
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
172 words
An imaging device wherein a latent image is formed by projecting an optical image on a photo and pressure sensitive recording sheet, on which a plurality of microcapsules enveloping photo-hardenable resins and chromogenic materials therein are coated, and a visible image is developed on a transfer sheet by pressurizing said recording sheet in superposed state with said transfer sheet, said transfer sheet being coated with color-developing agents which react with said chromogenic materials to develop said visible image, said recording sheet including a predetermined central area and a remaining area, which comprises: a first optical means for projecting said optical image onto said predetermined central area of said recording sheet; a second optical means for projecting light onto said remaining area so that substantially all microcapsules existing on said remaining area are hardened; and a pressing unit for pressing said recording sheet and said transfer sheet in superposed state, whereby, both edge portions of said recording sheet are always exposed by said second optical means irrespective of an image to be recorded.
Claim 2
Dependent Claim
172 words
An imaging device wherein a latent image is formed by projecting an optical image on a photo and pressure sensitive recording sheet, on which a plurality of microcapsules enveloping photo-hardenable resins and chromogenic materials therein are coated, and a visible image is developed on a transfer sheet by pressurizing said recording sheet in superposed state with said transfer sheet, said transfer sheet being coated with color-developing agents which react with said chromogenic materials to develop said visible image, said recording sheet including a predetermined central area and a remaining area, which comprises: a first optical means for projecting said optical image onto said predetermined central area of said recording sheet; a second optical means for projecting light onto said remaining area so that substantially all microcapsules existing on said remaining area are hardened; and a pressing unit for pressing said recording sheet and said transfer sheet in superposed state, whereby, both edge portions of said recording sheet are always exposed by said second optical means irrespective of an image to be recorded.
Claim 3
Dependent Claim
17 words
The imaging device according to claim 1 wherein said pressing unit comprises a pair of pressing rollers.
Claim 4
Dependent Claim
29 words
The imaging device according to claim 1 wherein said recording sheet is formed to be a rolled serial sheet while said transfer sheet is formed to a cut sheet.
Claim 5
Dependent Claim
154 words
An imaging device wherein a latent image is formed by projecting optical image on a photo and pressure sensitive recording sheet, on which a plurality of microcapsules enveloping photo-hardenable resins and chromogenic materials therein are coated, and visible image is developed on a transfer sheet by pressurizing said recording sheet in superposed state with said transfer sheet, said transfer sheet being coated with color-developing agents which react with said chromogenic materials to develop said visible image, which comprises: a light emitting diode array for exposing said recording sheet, said diode array being arranged to extend over and entire width of the recording sheet; and a pressing unit for pressing said recording sheet and said transfer in superposed state, wherein certain portions of said light emitting diode array corresponding to both edge portions of said recording sheet are always controlled to be in an ON state irrespective of variation of an image to be recorded.
Claim 6
Dependent Claim
154 words
An imaging device wherein a latent image is formed by projecting optical image on a photo and pressure sensitive recording sheet, on which a plurality of microcapsules enveloping photo-hardenable resins and chromogenic materials therein are coated, and visible image is developed on a transfer sheet by pressurizing said recording sheet in superposed state with said transfer sheet, said transfer sheet being coated with color-developing agents which react with said chromogenic materials to develop said visible image, which comprises: a light emitting diode array for exposing said recording sheet, said diode array being arranged to extend over and entire width of the recording sheet; and a pressing unit for pressing said recording sheet and said transfer in superposed state, wherein certain portions of said light emitting diode array corresponding to both edge portions of said recording sheet are always controlled to be in an ON state irrespective of variation of an image to be recorded.
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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) | 1992-03-27 | 1992-09-26 | 1993-03-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-03-27 | 1996-09-26 | 1997-03-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-03-27 | 2000-09-26 | 2001-03-28 | $7700.00 | Window Closed / Lapsed |