EP0194776A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Multicolor toner images in electrography
Assignee: 3M Co
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Filing: 1986-02-21
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Granted: —
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Expires: 2006-02-21
Abstract
Abstract There is disclosed here a method of transferring an assembly of overlaid color toner images from a primary electrostatic imaging surface (e.g., a photoconductor) to a receptor sheet by embedding and encapsulating the toner particles in a transparent binder. The transfer is accomplished in one step with no loss in image quality, either in color or in resolution, and presents a glossy final result. The final encapsulated image is also protected from abrasion and contamination.
Inventors
- 👤 Gregory L. C/O Minnesota Mining And Zwadlo
- 👤 Kevin M. C/O Minnesota Mining And Kidnie
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-29 22:16
CPC Classifications
G; G03; G03G; G03G9/00; G03G9/08; G03G7/00; G03G7/0006; G03G7/002; G03G7/0026; G03G7/0046; G03G11/00; G03G5/00; G03G5/12; G03G9/12
Claims Analysis
Total Claims: 24
Claim 1
Independent Claim
128 words
A process for electrographic multitoned image transfer comprising the steps of a) producing on the surface of an electrographic sheet a liquid toned image comprising at least two different toners absorbing radiation in different portions of the electromagnetic spectrum, b) contacting said surface with a receptor layer comprising a thermoplastic film-forming binder having a dry thickness in the range of 3 to 100 micrometers. c) applying between said electrographic sheet and said receptor layer a pressure of between 0.1 kg/cm 2 and 50 kg/c m 2 at a temperature in the range 20°C to 130°C, d) releasing the pressure, and e) separating said receptor layer from said one surface of said electrographic sheet, said receptor layer carrying said liquid toned image embedded in it and encapsulated by it.
Claim 2
Dependent Claim
128 words
A process for electrographic multitoned image transfer comprising the steps of a) producing on the surface of an electrographic sheet a liquid toned image comprising at least two different toners absorbing radiation in different portions of the electromagnetic spectrum, b) contacting said surface with a receptor layer comprising a thermoplastic film-forming binder having a dry thickness in the range of 3 to 100 micrometers. c) applying between said electrographic sheet and said receptor layer a pressure of between 0.1 kg/cm 2 and 50 kg/c m 2 at a temperature in the range 20°C to 130°C, d) releasing the pressure, and e) separating said receptor layer from said one surface of said electrographic sheet, said receptor layer carrying said liquid toned image embedded in it and encapsulated by it.
Claim 3
Dependent Claim
41 words
A process as recited in claim 1 wherein said pressure is between 0.3 kg/cm 2 and 5 kg/cm 2 , and said liquid toned image is dried prior to the application of pressure between said electrographic sheet and said receptor layer.
Claim 4
Dependent Claim
53 words
A process as recited in claim 1 wherein said receptor layer is contacted to said one surface of said electrographic sheet in step (b) by coating onto it a solution of said thermoplastic film-forming binder in a suitable solvent, drying off said solvent, and then contacting said receptor layer with a support surface.
Claim 5
Dependent Claim
18 words
A process as recited in claim 1 wherein said receptor layer is permanently adhered to a support surface.
Claim 6
Dependent Claim
24 words
A process as recited in claim 1 wherein said one surface of said electrographic sheet comprises a thin release layer of a film-forming silicone.
Claim 7
Dependent Claim
27 words
A-process as recited in claim 2 wherein said thermoplastic film-forming binder is chosen from the group consisting of acrylic resin dispersions, polyvinyl alcohol, and poly(vinyl acetal) resins.
Claim 8
Dependent Claim
27 words
A process as recited in claim 6 wherein said solvent is chosen from the group consisting of cycloaliphatic solvents, C l -C 6 alcohols, and aqueous alcohol.
Claim 9
Dependent Claim
43 words
A process as recited in claim 4 wherein the material of said thermoplastic film-forming binder has a Newtonian complex dynamic melt viscosity of less than about 1.7 x 10 3 poise and a loss tangent greater than 10 at the temperature of transfer.
Claim 10
Dependent Claim
32 words
A process as recited in claim 3 wherein said support surface comprises one of two major surfaces of a support sheet comprising paper, clear plastic, light diffusing plastic, glass, or opaque plastic.
Claim 11
Dependent Claim
25 words
A process as recited in claim 3 wherein the material of said thermoplastic film-forming binder is chosen from the group consisting of photo-cured epoxy oligomers.
Claim 12
Dependent Claim
127 words
A process for electrographic multitoned image transfer comprising the steps of a) producing on the surface of an electrographic sheet a liquid toned image comprising at least two different toners which are differentially readable by mechanical means, b) contacting said surface with a receptor layer comprising a thermoplastic film-forming binder having a dry thickness in the range of 3 to 100 micrometers. c) applying between said electrographic sheet and said receptor layer a pressure of between 0.1 kg/c m 2 and 50 kg/c m 2 at a temperature in the range 20°C to 130°C, d) releasing the pressure, and e) separating said receptor layer from said one surface of said electrographic sheet, said receptor layer carrying said liquid toned image embedded in it and encapsulated by it.
Claim 13
Dependent Claim
127 words
A process for electrographic multitoned image transfer comprising the steps of a) producing on the surface of an electrographic sheet a liquid toned image comprising at least two different toners which are differentially readable by mechanical means, b) contacting said surface with a receptor layer comprising a thermoplastic film-forming binder having a dry thickness in the range of 3 to 100 micrometers. c) applying between said electrographic sheet and said receptor layer a pressure of between 0.1 kg/c m 2 and 50 kg/c m 2 at a temperature in the range 20°C to 130°C, d) releasing the pressure, and e) separating said receptor layer from said one surface of said electrographic sheet, said receptor layer carrying said liquid toned image embedded in it and encapsulated by it.
Claim 14
Dependent Claim
21 words
A process as recited in claim 11 wherein said pressure is between 0.3 kg/cm 2 and 5 kg/c m 2 .
Claim 15
Dependent Claim
54 words
A process as recited in claim 11 wherein said receptor layer is contacted to said one surface of said electrographic sheet in step (b) by coating onto it a solution of said thermoplastic film-forming binder in a suitable solvent and drying off said solvent, and then contacting said receptor layer with a support surface.
Claim 16
Dependent Claim
18 words
A process as recited in claim 11 wherein said receptor layer is permanently adhered to a support sheet.
Claim 17
Dependent Claim
24 words
A process as recited in claim 11 wherein said one surface of said electrographic sheet comprises a thin release layer of a film-forming silicone.
Claim 18
Dependent Claim
133 words
A process for electrographic multitoned image transfer comprising the steps of a) producing on the surface of an electrographic sheet a first liquid toned image, b) producing on said surface with a toned image a second liquid toned image on said first liquid toned image, c) contacting said surface with a receptor layer comprising a thermoplastic film-forming binder having a dry thickness in the range of 3 to 100 micrometers. d) applying between said electrographic sheet and said receptor layer a pressure of between 0.1 kg/cm 2 and 50 kg/cm 2 at a temperature in the range 20°C to 130°C, e) releasing the pressure, and f) separating said receptor layer from said one surface of said electrographic sheet, said receptor layer carrying said liquid toned image embedded in it and encapsulated by it.
Claim 19
Dependent Claim
133 words
A process for electrographic multitoned image transfer comprising the steps of a) producing on the surface of an electrographic sheet a first liquid toned image, b) producing on said surface with a toned image a second liquid toned image on said first liquid toned image, c) contacting said surface with a receptor layer comprising a thermoplastic film-forming binder having a dry thickness in the range of 3 to 100 micrometers. d) applying between said electrographic sheet and said receptor layer a pressure of between 0.1 kg/cm 2 and 50 kg/cm 2 at a temperature in the range 20°C to 130°C, e) releasing the pressure, and f) separating said receptor layer from said one surface of said electrographic sheet, said receptor layer carrying said liquid toned image embedded in it and encapsulated by it.
Claim 20
Dependent Claim
44 words
A process as recited in claim 16 wherein said pressure is between 0.3 kg/cm 2 and 5 kg/cm 2 , and said first and second liquid toned images are dried prior to the application of pressure between said electrographic sheet and said receptor layer.
Claim 21
Dependent Claim
45 words
l8. A process as recited in claim 16 wherein said receptor layer is contacted to said one surface of said electrographic sheet in step (b) by coating onto it a solution of said thermoplastic film-forming binder in a suitable solvent and drying off said solvent.
Claim 22
Dependent Claim
18 words
A process as recited in claim 16 wherein said receptor layer is permanently adhered to a support surface.
Claim 23
Independent Claim
146 words
An apparatus for the formation of electrographic multitoned images comprising a) means for establishing a charge on an electrophotographic surface, b) means for imagewise removing charge on said electrophotographic surface, c) means for producing on said electrophotographic surface a liquid toned image comprising at least two different toners absorbing radiation in different portions of the electromagnetic spectrum, d) means for contacting said electrophotographic surface with a receptor layer comprising a thermoplastic film-forming binder having a dry thickness in the range of 3 to 100 micrometers. e) means for applying between said electrographic sheet and said receptor layer a pressure of between 0.1 kg/cm 2 and 50 kg/cm 2 at a temperature in the range of 20°C to 130°C, f) means for separating said receptor layer from said electrographic surface so that said receptor layer carries said liquid toned image embedded in it and encapsulated by it.
Claim 24
Independent Claim
146 words
An apparatus for the formation of electrographic multitoned images comprising a) means for establishing a charge on an electrophotographic surface, b) means for imagewise removing charge on said electrophotographic surface, c) means for producing on said electrophotographic surface a liquid toned image comprising at least two different toners absorbing radiation in different portions of the electromagnetic spectrum, d) means for contacting said electrophotographic surface with a receptor layer comprising a thermoplastic film-forming binder having a dry thickness in the range of 3 to 100 micrometers. e) means for applying between said electrographic sheet and said receptor layer a pressure of between 0.1 kg/cm 2 and 50 kg/cm 2 at a temperature in the range of 20°C to 130°C, f) means for separating said receptor layer from said electrographic surface so that said receptor layer carries said liquid toned image embedded in it and encapsulated by it.
References Cited (Backward Citations)
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