US3663748A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Facsimile system utilizing single crt for scanning and image reproduction
Assignee: Eastman Kodak Co
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Filing: 1969-08-06
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Granted: 1972-05-16
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Expires: 1989-08-06
Abstract
Abstract An electrostatic facsimile system utilized a single cathode ray tube in performing both scanning and image reproduction operations. In one embodiment, one gun of a twin gun tube is used to produce a flying spot for scanning a document to be reproduced. The light reflected by the document is collected by a photomultiplier tube which produces an electrical image signal which is fed, through suitable monitoring means, to the second gun of the cathode ray tube. The external ends of the wire array terminate on the surface of a suitable receiving medium, where an electrostatic image is produced. Such image is then developed and fixed to produce a facsimile of the original. In a second embodiment one electron gun of a cathode ray tube is used for both scanning and image reproduction operations by providing means for switching the beam produced by the signal gun so that it alternately produces a flying spot on the document and produces an electrostatic image on the wire array.
Inventors
- 👤 Joseph L Boon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 04:23
CPC Classifications
H; H04; H04N; H04N1/00; H04N1/23; H04N1/29; G; G03; G03G; G03G15/00; G03G15/22; G03G15/32; G03G15/326; G03G15/328
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
165 words
An electrostatic printing apparatus for reproducing a facsimile of an original document, said apparatus comprising: a cathode ray tube including a faceplate having a surface and first and second electron gun means each for producing an electron beam; a luminescent phosphor coating located on the surface of said faceplate at a position for impingement by the beam from said first electron gun means, said phosphor coating having the property of luminescing in response to electron bombardment, said original document being positionable for illumination by said phosphor; wire means passing through said faceplate and being positioned for impingement by the beam of said second electron gun means; means for sensing light from the original document and for producing an electrical image signal in accordance therewith; and means for modulating the electron beam produced by said second electron gun in response to the signal produced by said electrical image signal producing means, to produce an electrostatic charge on said wire means in accordance with said modulated beam.
Claim 2
Dependent Claim
165 words
An electrostatic printing apparatus for reproducing a facsimile of an original document, said apparatus comprising: a cathode ray tube including a faceplate having a surface and first and second electron gun means each for producing an electron beam; a luminescent phosphor coating located on the surface of said faceplate at a position for impingement by the beam from said first electron gun means, said phosphor coating having the property of luminescing in response to electron bombardment, said original document being positionable for illumination by said phosphor; wire means passing through said faceplate and being positioned for impingement by the beam of said second electron gun means; means for sensing light from the original document and for producing an electrical image signal in accordance therewith; and means for modulating the electron beam produced by said second electron gun in response to the signal produced by said electrical image signal producing means, to produce an electrostatic charge on said wire means in accordance with said modulated beam.
Claim 3
Dependent Claim
154 words
A facsimile apparatus for sensing visual information and reproducing such information, said apparatus comprising: a cathode ray tube having electron beam producing means and a faceplate, said faceplate having first and second regions, said first region having a coating of luminescent phosphor thereon so that impingement thereon of an electron beam will produce a luminous spot for illuminating said visual information, said second region having a plurality of conductors extending through said faceplate; deflecting means for sweeping an electron beam from said beam producing means over said first region and said second region; photoelectric pickup means disposed to sense light from visual information for producing an output in accordance therewith; means for controlling the intensity of the beam impinging upon said second region in accordance with the output of said photoelectric pickup means; and means for producing an image in accordance with the radiation received by said second region from said beam producing means.
Claim 4
Dependent Claim
154 words
A facsimile apparatus for sensing visual information and reproducing such information, said apparatus comprising: a cathode ray tube having electron beam producing means and a faceplate, said faceplate having first and second regions, said first region having a coating of luminescent phosphor thereon so that impingement thereon of an electron beam will produce a luminous spot for illuminating said visual information, said second region having a plurality of conductors extending through said faceplate; deflecting means for sweeping an electron beam from said beam producing means over said first region and said second region; photoelectric pickup means disposed to sense light from visual information for producing an output in accordance therewith; means for controlling the intensity of the beam impinging upon said second region in accordance with the output of said photoelectric pickup means; and means for producing an image in accordance with the radiation received by said second region from said beam producing means.
Claim 5
Dependent Claim
177 words
Apparatus for scanning information and for reproducing information on a recording medium, comprising: a cathode ray tube having a face surface and electron beam generating means; a coating on said face surface for establishing a spot of light on said face surface when electrically activated by an electron beam; means for focusing said spot of light on information to be reproduced; eleCtrostatic image means within said tube for establishing an electrostatic charge when electrically activated by an electron beam; means for displacing an electron beam generated by said beam generating means to scan a portion of said face surface to establish light spot scanning of the information; means responsive to light from the information during such scanning for establishing an electrical image signal; means responsive to said image signal for modulating an electron beam generated by said beam generating means during scanning of said electrostatic image means by said beam generating means to establish an electrostatic image corresponding to the scanned information; and means for converting said electrostatic image to a visible image on the recording medium.
Claim 6
Dependent Claim
177 words
Apparatus for scanning information and for reproducing information on a recording medium, comprising: a cathode ray tube having a face surface and electron beam generating means; a coating on said face surface for establishing a spot of light on said face surface when electrically activated by an electron beam; means for focusing said spot of light on information to be reproduced; eleCtrostatic image means within said tube for establishing an electrostatic charge when electrically activated by an electron beam; means for displacing an electron beam generated by said beam generating means to scan a portion of said face surface to establish light spot scanning of the information; means responsive to light from the information during such scanning for establishing an electrical image signal; means responsive to said image signal for modulating an electron beam generated by said beam generating means during scanning of said electrostatic image means by said beam generating means to establish an electrostatic image corresponding to the scanned information; and means for converting said electrostatic image to a visible image on the recording medium.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-05-16 | 1975-11-15 | 1976-05-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-16 | 1979-11-15 | 1980-05-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-16 | 1983-11-15 | 1984-05-16 | $7700.00 | Window Closed / Lapsed |