Claims
- 1. A method of curing a heat curable film on a surface of a part of a cathode ray tube, characterized in that the film is cured by a hot gas flow which is blown onto a limited surface area of the film and which scans the surface as a result of movement of at least one of said hot gas flow and said surface relative to the other.
- 2. A method as claimed in claim 1, characterized in that the film is provided on the outside of a part of an evacuated cathode ray tube.
- 3. A method as claimed in claim 2, characterized in that the film is provided on the outside of the display window of the evacuated cathode ray tube.
- 4. A method as claimed in claim 3 wherein the surface is substantially rectangular, and the gas flow covers a strip-shaped area extending over the surface in a first direction, said gas flow being moved over the surface in a direction transversely to the first direction.
- 5. A method as claimed in claim 3 wherein the temperature of the gas flow is in excess of 500.degree. C.
- 6. A method as claimed in claim 3 wherein the size of the cathode ray tube, measured along the diagonal of the display window, is in excess of 50 cm.
- 7. A method as claimed in claim 2, characterized in that the film is provided on the outside of the cone of an evacuated cathode ray tube.
- 8. A method as claimed in claim 7 wherein the size of the cathode ray tube, measured along the diagonal of the display window, is in excess of 50 cm.
- 9. A method as claimed in claim 2, characterized in that the size of the cathode ray tube, measured along the diagonal of the display window, is in excess of 50 cm.
- 10. A method as claimed in claim 2 wherein the surface is substantially rectangular, and the gas flow covers a strip-shaped area extending over the surface in a first direction, said gas flow being moved over the surface in a direction transversely to the first direction.
- 11. A method as claimed in claim 2 wherein the temperature of the gas flow is in excess of 500.degree. C.
- 12. A method as claimed in claim 1, characterized in that the surface is substantially rectangular, and in that the gas flow covers a strip-shaped area extending over the surface in a first direction, said gas flow being moved over the surface in a direction transversely to the first direction.
- 13. A method as claimed in claim 12, characterized in that the temperature of the gas flow ranges between 700.degree. C. and 1000.degree. C.
- 14. A method as claimed in claim 1, characterized in that the temperature of the gas flow is in excess of 500.degree. C.
- 15. A device for curing a heat curable film on a surface having a curvature of a display window of or for a cathode ray tube without substantial deterioration of the film or cathode ray tube, wherein the device comprises means for blowing a hot gas flow having a temperature in excess of 500.degree. C. onto a specific area of the surface of the display window, and means for scanning the surface with a gas flow by movement of at least one of said hot gas flow and said surface relative to the other, and wherein said means for blowing the hot gas flow approximately follows the curvature of the surface.
- 16. A device as claimed in claim 15, characterized in that the device comprises a slit-shaped nozzle for blowing a gas flow onto a specific area of the display window, and means for moving the nozzle and the surface relative to each other in a direction transversely to the slit-shaped nozzle.
- 17. A device as claimed in claim 16 wherein the device comprises means for keeping the distance between the nozzle and the surface at least substantially equal.
- 18. A device as claimed in claim 15, characterized in that the device comprises means for keeping the distance between the nozzle and the surface at least substantially equal.
- 19. A device for curing a heat curable film on a surface having a curvature of a display window of or for a cathode ray tube without substantial deterioration of the film or cathode ray tube, wherein the device comprises a slit-shaped nozzle for blowing a hot gas flow having a temperature in excess of 500.degree. C. onto a specific area of the surface of the display window, and means for scanning the surface with a gas flow by movement of at least one of said hot gas flow and said surface relative to the other and wherein said slit-shaped nozzle follows approximately the curvature of the surface.
- 20. A device as claimed in claim 19 wherein the device comprises means for keeping the distance between the nozzle and the surface at least substantially equal.
- 21. A device for curing a heat curable film on a surface having a curvature of a display window of or for a cathode ray tube without substantial deterioration of the film or cathode ray tube, wherein the device comprises a slit-shaped nozzle for blowing a hot gas flow having a temperature in excess of 500.degree. C. onto a specific area of the surface of the display window, and means for scanning the surface with a gas flow by movement of at least one of said hot gas flow and said surface relative to the other in a direction transversely to the slit-shaped nozzle, and wherein said slit-shaped nozzle follows approximately the curvature of the surface.
Priority Claims (1)
Number |
Date |
Country |
Kind |
92203982 |
Dec 1992 |
EPX |
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Parent Case Info
This is a continuation of application Ser. No. 08/165,431, filed Dec. 10, 1993, now abandoned.
US Referenced Citations (6)
Continuations (1)
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Number |
Date |
Country |
Parent |
165431 |
Dec 1993 |
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