US3680955A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for forming an electrostatic image in a camera
Assignee: Minolta Co Ltd
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Filing: 1969-07-09
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Granted: 1972-08-01
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Expires: 1989-07-09
Abstract
Abstract In a camera wherein images are formed electrostatically, a flexible photosensitive element is spaced from a transparent electrode and an electrode roller engages the flexible photosensitive element into contacting relationship along a narrow width thereof with the transparent electrode. The roller is translated across the transparent electrode so that a latent image is formed on the flexible photosensitive element. The apparatus includes structure for impressing a D.C. voltage between a transparent electrode and an electrode roller to provide the necessary electrostatic field to transfer the image.
Inventors
- 👤 Kintaro Yata
- 👤 Koji Noda
- 👤 Hiroshi Ueda
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 17:27
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/22; G03G15/26
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
170 words
A camera of the electrostatic image forming type having an objective lens comprising: a flexible photosensitive element including a photosensitive layer having persistent internal polarization characteristics and an insulating layer, a plate-like transparent electrode interposed between said objective lens and said flexible element with said insulating layer opposing said transparent electrode in spaced relationship thereto, an electrode roller, a driving member for moving said electrode roller across said photosensitive layer, at least two rollers each mounted at opposite ends of said transparent electrode, said flexible element is supported by said at least two rollers, said electrode roller presses said insulating layer into contact with said transparent electrode by deforming said flexible element, means for impressing a DC voltage between said transparent electrode and said electrode roller as said driving member moves said electrode roller across said photosensitive layer to press said insulating layer in contact with said plate-like transparent electrode only over a limited area, and said flexible element and said transparent electrode are separated along their remaining opposing surface.
Claim 2
Dependent Claim
170 words
A camera of the electrostatic image forming type having an objective lens comprising: a flexible photosensitive element including a photosensitive layer having persistent internal polarization characteristics and an insulating layer, a plate-like transparent electrode interposed between said objective lens and said flexible element with said insulating layer opposing said transparent electrode in spaced relationship thereto, an electrode roller, a driving member for moving said electrode roller across said photosensitive layer, at least two rollers each mounted at opposite ends of said transparent electrode, said flexible element is supported by said at least two rollers, said electrode roller presses said insulating layer into contact with said transparent electrode by deforming said flexible element, means for impressing a DC voltage between said transparent electrode and said electrode roller as said driving member moves said electrode roller across said photosensitive layer to press said insulating layer in contact with said plate-like transparent electrode only over a limited area, and said flexible element and said transparent electrode are separated along their remaining opposing surface.
Claim 3
Dependent Claim
68 words
A camera of the electrostatic image forming type as in claim 1, wherein said driving member consists of a supply drum rotatably mounted on one side of said transparent electrode, a take-up drum rotatably mounted on the opposite side of said transparent electrode, said supply and take-up drums are interconnected by a flexible shaft, and said electrode roller is rotatably mounted on said flexible shaft between said drums.
Claim 4
Dependent Claim
53 words
A camera of the electrostatic image forming type as in claim 2, wherein said take-up drum is spring-loaded, said supply drum includes a load mechanism, and said spring and said load mechanism control the moving speed of said flexible shaft to adjust the traversal time of said electrode roller across said photosensitive element.
Claim 5
Dependent Claim
62 words
A camera of the electrostatic image forming type as in claim 2, wherein said one of said rollers includes a winding device interlocked with said supply drum, said winding device actuates said supply drum to move said electrode roller to said supply drum against the spring force of said take-up drum and rotates one of said rollers to move said flexible element.
Claim 6
Dependent Claim
51 words
A camera of the electrostatic image forming type as claim 2, further comprising a DC source and wherein said flexible shaft is electrically conductive and electrically connects one pole of said DC source to said electrode roller, and the other pole of said DC source is connected to said transparent electrode.
Claim 7
Dependent Claim
139 words
A camera of the electrostatic image forming type as in claim 5 further comprising a double-pole double-throw switch for connecting said DC source between said transparent electrode and said electrode roller, whereby one position of said switch connects said DC source with a specific polarity between said transparent electrode and said electrode roller and said driving member is actuated to move said electrode roller across said flexible element to precharge the surface of said photosensitive layer, and a second position of said switch reverses the polarity of said DC source connected between said transparent electrode and said electrode roller and said driving member is actuated to return said electrode roller and press said insulating element against said transparent electrode to transfer a charge to said photosensitive layer representing a latent image of an object transmitted through said objective lens.
Claim 8
Dependent Claim
38 words
A camera of the electrostatic image forming type as in claim 6, wherein said winding device moves said photosensitive element one picture frame portion at a time to allow said imaGe to be transferred to said photosensitive element.
Claim 9
Dependent Claim
24 words
A camera of the electrostatic image forming type as in claim 1 wherein said flexible element is in the form of an endless belt.
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) | 1975-08-01 | 1976-01-31 | 1976-08-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-01 | 1980-01-31 | 1980-08-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-01 | 1984-01-31 | 1984-08-01 | $7700.00 | Window Closed / Lapsed |