US3854043A
Expired / Lapsed
US
⏱️ 0.0 years remaining
X-ray color electrophotography
Assignee: Konica Minolta Inc
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Filing: 1973-02-16
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Granted: 1974-12-10
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Expires: 1993-02-16
Abstract
Abstract An electrostatic latent image formed on a photoconductive layer by means of X-ray electrophotography is divided into at least two regions by the degree of electrostatic potential, said regions being represented by different colors after being developed by depositing a different color developer powder on each of said regions.
Inventors
- 👤 Sigeru
- 👤 M Hukase
- 👤 M Tomono
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 16:35
CPC Classifications
G; G03; G03G; G03G13/00; G03G13/06; G03G13/08; G03G13/22; Y; Y10; Y10S; Y10S430/00; Y10S430/167; Y10S430/168
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
118 words
A METHOD OF PRODUCING A MULTI-COLOR X-RAY ELECTROPHOTOGRAPH COMPRISING: CHARGING A PHOTOCONDUCTIVE LAYER OF AN X-RAY SENSITIVE PLATE COMPRISING A BSSE AND THE PHOTOCONDUCTIVE LAYER, EXPOSING THE CHARGED PHOTOCONDUCTIVE LAYER TO X-RAYS WHICH HAVE PASSED THROUGH AN OBJECT TO THE ELECTROPHOTOGRAPHED SUCH THAT AN ELECTROSTATIC LATENT IMAGE IS FORMED ON SAID PHOTOCONDUCTIVE LAYER, SAID IMAGE HAVING REGIONS OF REDUCED CHARGE DENSITY IN ACCORDANCE WITH THE CONCENTRATION OF EXPOSING X-RAYS, INJECTING A FIRST COLOR DEVELOPER POWSER ONTO THE SURFACE OF SAID PHOTOCONDUCTIVE LAYER, SAID FIRST POWDER HAVING AN ELECTRICAL CHARGE OF SIGN OPPOSITE TO THAT OF THE PHOTOCONDUCTIVE LAYER, APPLYING AN ELECTRICAL FORCE TO SAID FIRST POWDER, SAID FORCE HAVING A MAGNITUDE LESS THAN THE MAGNITUDE OF THE FORCE
Claim 2
Independent Claim
118 words
A METHOD OF PRODUCING A MULTI-COLOR X-RAY ELECTROPHOTOGRAPH COMPRISING: CHARGING A PHOTOCONDUCTIVE LAYER OF AN X-RAY SENSITIVE PLATE COMPRISING A BSSE AND THE PHOTOCONDUCTIVE LAYER, EXPOSING THE CHARGED PHOTOCONDUCTIVE LAYER TO X-RAYS WHICH HAVE PASSED THROUGH AN OBJECT TO THE ELECTROPHOTOGRAPHED SUCH THAT AN ELECTROSTATIC LATENT IMAGE IS FORMED ON SAID PHOTOCONDUCTIVE LAYER, SAID IMAGE HAVING REGIONS OF REDUCED CHARGE DENSITY IN ACCORDANCE WITH THE CONCENTRATION OF EXPOSING X-RAYS, INJECTING A FIRST COLOR DEVELOPER POWSER ONTO THE SURFACE OF SAID PHOTOCONDUCTIVE LAYER, SAID FIRST POWDER HAVING AN ELECTRICAL CHARGE OF SIGN OPPOSITE TO THAT OF THE PHOTOCONDUCTIVE LAYER, APPLYING AN ELECTRICAL FORCE TO SAID FIRST POWDER, SAID FORCE HAVING A MAGNITUDE LESS THAN THE MAGNITUDE OF THE FORCE
Claim 3
Dependent Claim
23 words
The method according to claim 1 wherein said photo conductive layer is exposed to said X-rays only once for each multi color electrophotograph.
Claim 4
Dependent Claim
92 words
The method according to claim 2, wherein said method further comprises providing a development electrode, placing said first development powder between said electrode and said surface of the photoconductive layer, and the electrical force is applied to said first powder by impressing a potential on said electrode such that said potential has a sign opposite to that of said first powder and exerts on said first powder said electrical force which has a magnitude less than the magnitude of the force which the region of maximum potential exerts on said first powder.
Claim 5
Dependent Claim
71 words
The method according to claim 2, wherein the step of applying the electrical force on said first powder comprises impressing a potential on the base such that said potential has the same sign as the sign of said first powder and exerts on said first powder said electrical force which has the magnitude less than the magnitude of the force which the region of maximum potential exerts on said first powder.
Claim 6
Dependent Claim
42 words
The method according to claim 3 wherein the step of adjusting the magnitude of the applied force comprises lowering the potential on said electrode to a level lower than the potential on the next highest potential region of said photo conductive layer.
Claim 7
Dependent Claim
46 words
The method according to claim 4 wherein the step of adjusting the magnitude of the applied potential comprises lowering the magnitude of the potential impressed on said base to a level lower than the potential on the next highest potential region of said photo conductive layer.
Claim 8
Dependent Claim
12 words
A multi-color X-ray electrophotograph produced by the method according to claim 1.
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) | 1977-12-09 | 1978-06-10 | 1978-12-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-12-09 | 1982-06-10 | 1982-12-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-12-09 | 1986-06-10 | 1986-12-10 | $7700.00 | Window Closed / Lapsed |