Patent US3793017A successfully refreshed from Google Patents.
US3793017A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Image fixing method
Assignee: Individual
•
Filing: 1972-10-27
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Granted: 1974-02-19
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Expires: 1992-10-27
Abstract
Abstract This invention pertains to an imaging system wherein there is employed a structure comprising a cohesively weak electrically photosensitive imaging layer sandwiched between a donor sheet and a receiver sheet. The imaging layer is rendered structurally fracturable by treating the layer with an activator. After exposing the imaging layer to actinic electromagnetic radiation while the imaging layer subjected to an electric field, the sandwich is separated whereby the imaging layer fractures with the exposed portions of the imaging layer residing on one of the sheets and the unexposed portion residing on the other sheet. Images are produced in accordance with the present invention which are highly fixed to their substrates by employing in the imaging process an activator which is or contains an unsaturated hydrocarbon component that can be easily oxidized to form a protective coating in and on the image produced by the imaging process.
Inventors
- 👤 G Reinis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 19:19
CPC Classifications
G; G03; G03G; G03G17/00; G03G17/08
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
44 words
The method of claim 1 wherein the activator comprises at least one hydrocarbon having a concentration of reactive unsaturation held in a liquid medium, said medium being selected from the group consisting of solvents, partial solvents, swelling and softening agents for said imaging layer.
Claim 2
Dependent Claim
18 words
The method of claim 2 wherein said activator comprises at least a partial solvent for said imaging layer.
Claim 3
Dependent Claim
14 words
The method of claim 2 wherein the unsaturated hydrocarbon is soluble in said activator.
Claim 4
Dependent Claim
14 words
The method of claim 2 wherein the unsaturated hydrocarbon is dispersed in said activator.
Claim 5
Dependent Claim
26 words
The method of claim 1 wherein said unsaturated hydrocarbon is selected from the group consisting of partial solvents softening and swelling agents for said imaging layer.
Claim 6
Dependent Claim
11 words
The method of claim 1 wherein said hydrocarbon comprises linseed oil.
Claim 7
Dependent Claim
34 words
The method of claim 2 wherein the saturated hydrocarbon comprises linseed oil. 9 The method of claim 1 wherein the unsaturated hydrocarbon is oxidized at least in part by the application of heat thereto.
Claim 8
Dependent Claim
155 words
An imaging method comprising; a. providing an electrically photosensitive imaging layer sandwiched between a donor sheet and a receiver sheet, at least one of said sheets being at least partially transparent to electromagnetic radiation to which said imaging layer is sensitive; b. activating said imaging layer by applying thereto an activating amount of an activator at least one component of which is a hydrocarbon having a concentration of reactive unsaturation whereby it can be oxidized to form a film; c. subjecting said imaging layer to an electric field and exposing said imaging layer to electromagnetic radiation to which it is sensitive through one of said sheets; d. separating said donor and receiver sheet whereby said imaging layer fractures in imagewise configuration providing a positive image on one of said donor and receiver sheets and a negative image on the other sheet, and; e. oxidizing said hydrocarbon whereby protective, fixitive film is formed on said image.
Claim 9
Dependent Claim
33 words
The method of claim 1 further including the step of transferring the image from at least one of the donor and receiver sheets to a final substrate prior to oxidizing said unsaturated hydrocarbon.
Claim 10
Dependent Claim
11 words
The method of claim 2 wherein the activator is a thermo-solvent.
Claim 11
Dependent Claim
23 words
The method of claim 12 wherein the thermosolvent comprises a low melting wax saturated with said hydrocarbon having a concentration of reactive unsaturation.
Claim 12
Dependent Claim
19 words
The method of claim 1 wherein the imaging layer comprises an electrically photosensitive material dispersed in an insulating binder.
Claim 13
Dependent Claim
14 words
The method of claim 14 wherein the electrically photosensitive material is an organic material.
References Cited (Backward Citations)
US3573904A
Cited
US3723112A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-02-18 | 1977-08-20 | 1978-02-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-02-18 | 1981-08-20 | 1982-02-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-02-18 | 1985-08-20 | 1986-02-19 | $7700.00 | Window Closed / Lapsed |