US3900318A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Use of sublimable disperse dyes in photoelectrophoretic image reproduction
Assignee: Novartis AG
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Filing: 1973-05-14
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Granted: 1975-08-19
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Expires: 1993-05-14
Abstract
Abstract The present invention relates to a process wherein disperse dyes which can be converted into the vapour state at temperatures between 160* and 220* C under atmospheric pressure are used in photoelectrophoretic image reproduction and to the use of the image obtained according to the said process for reproducing a symmetric image on a surface other than the injector electrode or blocking electrode, or both by heating this image in contact with said surface to the sublimation range of the dyes used.
Inventors
- 👤 Georgeos Zographos
- 👤 Peter Mockli
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 06:45
CPC Classifications
G; G03; G03G; G03G17/00; G03G17/04
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
101 words
IN A PROCESS FOR PRODUCING AN IMAGE BY THE PHOTOELECTROPHORETIC IMAGE REPRODUCING SYSTEM, COMPRISING THE STEPS OF (A) IRRADIATING WITH LIGHT A VOLATILE LIQUID DYESTUFF SUSPENSION, CAUSING MIGRATION OF SAID DYESTUFF IN SAID SUSPENSION FROM AN INJECTOR ELECTRODE TO A BLOCKING ELECTRODE, (B) EVAPORATING THE VOLATILE LIQUID TO LEAVE A POWDER DYESTUFF IMAGE ON THE INJECTOR ELECTRODE OR THE BLOCKING ELECTRODE OR BOTH AND, (C) FIXING THE IMAGE, THE IMPROVEMENT COMPRISING USING AS SAID DYESTUFF A DISPERSE DYE OR A MIXTURE OF DISPERSE DYES WHICH CAN BE CONVERTED INTO THE VAPOR STATE AT TEMPERATURES BETWEEN 160*C AND 220*C UNDER ATMOSPHERIC PRESSURE.
Claim 2
Dependent Claim
101 words
IN A PROCESS FOR PRODUCING AN IMAGE BY THE PHOTOELECTROPHORETIC IMAGE REPRODUCING SYSTEM, COMPRISING THE STEPS OF (A) IRRADIATING WITH LIGHT A VOLATILE LIQUID DYESTUFF SUSPENSION, CAUSING MIGRATION OF SAID DYESTUFF IN SAID SUSPENSION FROM AN INJECTOR ELECTRODE TO A BLOCKING ELECTRODE, (B) EVAPORATING THE VOLATILE LIQUID TO LEAVE A POWDER DYESTUFF IMAGE ON THE INJECTOR ELECTRODE OR THE BLOCKING ELECTRODE OR BOTH AND, (C) FIXING THE IMAGE, THE IMPROVEMENT COMPRISING USING AS SAID DYESTUFF A DISPERSE DYE OR A MIXTURE OF DISPERSE DYES WHICH CAN BE CONVERTED INTO THE VAPOR STATE AT TEMPERATURES BETWEEN 160*C AND 220*C UNDER ATMOSPHERIC PRESSURE.
Claim 3
Dependent Claim
27 words
A process according to claim 1, wherein a sublimable disperse dye which corresponds to one of the formulae F1 to F24 is used in photoelectrophoretic image reproduction.
Claim 4
Dependent Claim
21 words
A process according to claim 1, wherein the size of the dyestuff particles is between 0.1 Mu to 5 Mu .
Claim 5
Dependent Claim
50 words
A process wherein an image obtained according to claim 1 is used for reproducing a symmetric image on a surface other than the injector electrode or blocking electrode, or both, which process consists in heating this image in contact with said surface to the sublimation range of the dyes used.
References Cited (Backward Citations)
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US3246148A
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US3384566A
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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) | 1978-08-18 | 1979-02-17 | 1979-08-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-08-18 | 1983-02-17 | 1983-08-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-08-18 | 1987-02-17 | 1987-08-19 | $7700.00 | Window Closed / Lapsed |