Patent US3697168A successfully refreshed from Google Patents.
US3697168A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrostatic reproduction device
Assignee: COPYSTATICS Inc C/O LOWENTHAL A DE CORP
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Filing: 1969-12-29
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Granted: 1972-10-10
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Expires: 1989-12-29
Abstract
Abstract An electrostatic reproduction device employing a continuous belt having a charge imparted thereto of a first polarity which is exposed to an image to be reproduced. One surface of a paper web upon which the reproduction will be made is brought in direct contact with the belt after charging and exposure. The second oppositely disposed surface of said paper is subjected to the action of a toner which is attracted to the second surface as a result of a charge imparted to the paper by the charged belt.
Inventors
- 👤 Jules Nisenson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 05:17
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/22; G03G15/14; G03G15/18
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
120 words
An electrostatic reproduction device comprising a movable belt member having a chargeable surface, means for charging said surface to a first polarity, a rotatable drum for receiving an original thereon and placing it in direct contact with said chargeable surface, means for exposing said surface to an image of the original to be duplicated, paper supply means for presenting a first surface of a web of paper to direct contact with said chargeable surface, and means for subjecting a second oppositely disposed surface of said paper web to the action of a toner having a charge of polarity opposite that of said first polarity while the first surface of said paper web is in direct contact with said chargeable surface.
Claim 2
Dependent Claim
120 words
An electrostatic reproduction device comprising a movable belt member having a chargeable surface, means for charging said surface to a first polarity, a rotatable drum for receiving an original thereon and placing it in direct contact with said chargeable surface, means for exposing said surface to an image of the original to be duplicated, paper supply means for presenting a first surface of a web of paper to direct contact with said chargeable surface, and means for subjecting a second oppositely disposed surface of said paper web to the action of a toner having a charge of polarity opposite that of said first polarity while the first surface of said paper web is in direct contact with said chargeable surface.
Claim 3
Dependent Claim
68 words
An electrostatic reproduction device in accordance with claim 1 wherein said movable belt member is supported by spaced-apart first, second and third rollers, and wherein said charging means is located between said first and second rollers, said exposing means is located between said second and third rollers, and said means for subjecting said paper to the action of a toner is located between said first and third rollers.
Claim 4
Dependent Claim
50 words
An electrostatic reproduction device in accordance with claim 2 wherein said original is placed in direct contact with said chargeable surface between said second and third rollers, and the first surface of said paper web is presented in direct contact with said chargeable surface between said first and third rollers.
Claim 5
Dependent Claim
63 words
An electrostatic reproduction device in accordance with claim 3 wherein said means for subjecting said paper to the action of a toner includes a toothed wheel defining a periphery having a plurality of interstices, means for placing a supply of toner in said interstices, and means for driving said wheel at a surface velocity in excess of that of said paper supply means.
Claim 6
Dependent Claim
45 words
An electrostatic reproduction device in accordance with claim 4 wherein said rotatable drum is transparent and said exposing means is located within said transparent drum to expose said original while it is in direct contact with said chargeable surface between said second and third rollers.
Claim 7
Dependent Claim
45 words
An electrostatic reproduction device in accordance with claim 4 wherein said rotatable drum is translucent and said exposing means is located within said translucent drum to expose said original while it is in direct contact with said chargeable surface between said second and third rollers.
References Cited (Backward Citations)
US3002434A
Cited
US3185777A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-10-10 | 1976-04-10 | 1976-10-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-10-10 | 1980-04-10 | 1980-10-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-10-10 | 1984-04-10 | 1984-10-10 | $7700.00 | Window Closed / Lapsed |