Claims
- 1. An electrophotographic single color copy process comprising the steps of applying an electrostatic charge onto the face of a receptor formed of a substrate having on its face a single photoconductive coating comprising a photoconductor, at least one sensitizer which sensitizes the photoconductor to at least a portion of the spectrum of visible light, a binder and a dispersed dye, exposing the charged receptor to an original whereby portions of the photoconductive coating corresponding to the non-imaged areas of the original are discharged leaving a latent electrostatic image on the receptor, developing the exposed receptor with a developing composition containing a toner in the form of a material which, when in an activated state, is a solvent for the dispersed dye or an adhesive for the coating whereby toner is retained on the coating in areas retaining the electrostatic charge, and bringing a copy sheet in surface contact with the coating containing toner on the face thereof in a fluid state to cause transfer of the dispersed dye from the areas retaining the latent electrostatic charge to corresponding areas of the copy sheet.
- 2. A process as defined in claim 1 wherein the copy sheet is a transparent film.
- 3. A process as defined in claim 1 wherein the copy sheet is a duplicating master.
- 4. A process as defined in claim 1 wherein the photoconductor is photoconductive zinc oxide.
- 5. A process as defined in claim 1 wherein the photoconductive coating is present in a coating weight of 5-40 pounds per 3,000 square feet of surface area.
- 6. A process as defined in claim 1 wherein the coating containing 10-200 parts by weight binder per 100 parts by weight photoconductor.
- 7. A process as defined in claim 1 wherein the coating contains 0.001 to 5.0 parts by weight of the sensitizer per 100 parts by weight photoconductor.
- 8. A process as defined in claim 1 wherein the coating contains 0.5 to 20.0 parts by weight of the dispersed dye per 100 parts of photoconductor.
- 9. A process as defined in claim 1 wherein the toner is a material which, when in a molten state, is a solvent for the dispersed dye.
- 10. A process as defined in claim 9 wherein the toner is selected from the group consisting of antipyrine and 1-allyl-2-thiourea.
- 11. A process as defined in claim 1 wherein the toner is a material which, when in a molten state, is an adhesive for the coating containing dispersed dye.
- 12. A process as defined in claim 11 wherein the toner is micronized polyethylene.
- 13. A process as defined in claim 1 wherein the sensitizer sensitizes the photoconductor over substantially the entire spectrum of visible light.
- 14. A process as defined in claim 1 wherein the sensitizer is a combination of sensitizing dyes, each of which sensitize the photoconductor over a segment of the visible spectrum, with sufficient dyes to cover the entire visible spectrum.
- 15. A process as defined in claim 14 wherein the sensitizer is a combination of three sensitizing dyes which sensitize the photoconductor to each of the primary additive colors of red, blue and green.
- 16. A process as defined in claim 1 wherein the sensitizer is a sensitizing dye which sensitizes the photoconductor to a selected portion of the visible spectrum.
- 17. A process as defined in claim 16 wherein the sensitizer is a sensitizing dye which sensitizes the photoconductor to the additive primary color of red.
- 18. A process as defined in claim 16 wherein the sensitizer is a sensitizing dye which sensitizes the photoconductor to the additive primary color of blue.
- 19. A process as defined in claim 16 wherein the sensitizer is a sensitizing dye which sensitizes the photoconductor to the additive primary color of green.
- 20. A process as defined in claim 1 wherein the dispersed dye is a spirit soluble dye.
- 21. A process as defined in claim 1 wherein the dispersed dye is a pigment and the toner serves as an adhesive for the coating containing the pigment when in an activated state.
- 22. An electrophotographic single color copy process comprising the steps of applying an electrostatic charge onto the face of a receptor formed of a substrate having on its face a single photoconductive coating comprising a photoconductor, at least one sensitizer which sensitizes the photoconductor to at least a portion of the spectrum of visible light, a binder and a dispersed dye, exposing the charged receptor to an original whereby portions of the photoconductive coating corresponding to the non-imaged areas of the original are discharged leaving a latent electrostatic image on the receptor, developing the exposed receptor with a developing composition containing a toner in the form of a material which, when activated by heat solvent or vapor, is a solvent for the dispersed dye whereby toner is retained on the coating in areas retaining the electrostatic charge, and bringing a copy sheet in surface contact with the coating containing toner on the face thereof in a fluid state to cause transfer of the dispersed dye from the areas retaining the latent electrostatic charge to corresponding areas of the copy sheet.
Parent Case Info
This is a continuation of application Ser. No. 94,124, filed Dec. 1, 1970, now abandoned.
US Referenced Citations (7)
Continuations (1)
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Number |
Date |
Country |
Parent |
94124 |
Dec 1970 |
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