US3812780A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrographic forms print station
Assignee: Bull HN Information Systems Italia SpA
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Filing: 1973-01-02
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Granted: 1974-05-28
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Expires: 1993-01-02
Abstract
Abstract An electrographic printing device is provided with a forms print station including an electrode drum having forms information raised thereon which operates on a dielectric print medium. The forms print station provides means for the rapid printing of various size forms on the print medium which are then transported through the electrographic printing device for the addition of variable information at a print station downstream thereof.
Inventors
- 👤 R Borelli
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 17:35
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/22; G03G15/32; G03G15/321; Y; Y10; Y10S; Y10S101/00; Y10S101/37
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
201 words
An apparatus for providing electrographic printing on a flat flexible dielectric medium comprising driving means for moving said medium along a path, excitation means along the path for applying a latent charge to said medium in response to variable signals to form variable latent images on said medium and a forms print station located along said path upstream of said excitation means for successively forming the same latent image on said medium, said forms print station comprising roller means in frictional engagement with said medium and rotated about its axis by movement of said medium, a print drum having characters, extending from a surface thereof for forming said same latent image on each rotation of said drum which is rotatable about its axis, means for biasing said print drum toward said roller means, said drum further having ring means disposed near the ends thereof for contacting said roller means whereby said print drum is rotated by said roller means and means for applying a voltage to said drum to establish a difference of potential across the surface of said dielectric medium to produce a latent charge on the surface of said dielectric medium in the form of said print drum characters.
Claim 2
Independent Claim
201 words
An apparatus for providing electrographic printing on a flat flexible dielectric medium comprising driving means for moving said medium along a path, excitation means along the path for applying a latent charge to said medium in response to variable signals to form variable latent images on said medium and a forms print station located along said path upstream of said excitation means for successively forming the same latent image on said medium, said forms print station comprising roller means in frictional engagement with said medium and rotated about its axis by movement of said medium, a print drum having characters, extending from a surface thereof for forming said same latent image on each rotation of said drum which is rotatable about its axis, means for biasing said print drum toward said roller means, said drum further having ring means disposed near the ends thereof for contacting said roller means whereby said print drum is rotated by said roller means and means for applying a voltage to said drum to establish a difference of potential across the surface of said dielectric medium to produce a latent charge on the surface of said dielectric medium in the form of said print drum characters.
Claim 3
Dependent Claim
51 words
The apparatus of claim 1 wherein said roller means is of an electrical insulating material and wherein said means for establishing a difference of potential across said medium comprises conductive means located adjacent said roller means and the opposite surface of said medium and a voltage source connected to said drum.
Claim 4
Dependent Claim
34 words
The apparatus of claim 1 wherein said roller means is of electrical conductive material and said means for establishing a difference in potential across said medium comprises a voltage source connected to said drum.
Claim 5
Dependent Claim
29 words
The apparatus of claim 1 wherein said print drum is pivotably supported for movement of its rotational axis along an arc intersecting the rotational axis of said roller means.
Claim 6
Dependent Claim
58 words
The apparatus of claim 4 which further includes means connected to said drum for indicating the beginning of each successive same image to be formed by rotation of said drum and stationary means adjacent said drum for sensing said indicating means and providing a signal to said excitation means in response to the sensing of said indicating means.
Claim 7
Independent Claim
237 words
An apparatus for providing electrographic printing on a flat flexible dielectric medium comprising driving means for moving said medium along a path, excitation means along the path for applying a latent charge to said medium in response to variable signals to form variable latent images on said medium, a forms print station located along said path upstream of said excitation means for successively forming the same latent image on said medium and toner developer means disposed between said excitation means and said forms print station, for developing the latent images so fOrmed at said station, said forms print station comprising a roller fabricated of electrically insulated material in frictional engagement with said medium and rotated about its axis by movement of said medium, a print drum having characters extending from a surface thereof for forming said same latent image on each rotation of said drums which is rotatable about its axis, means biasing said print drum towards said roller, said drum further having a pair of rings extending outwardly from said surface thereof, one located adjacent either end of said drum for contacting said roller whereby said drum is rotated by movement of said roller, and means for applying a voltage to said drum to establish a difference of potential across the surface of said dielectric medium to produce a latent charge on the surface of said dielectric medium in the form of said print drum characters.
Claim 8
Independent Claim
237 words
An apparatus for providing electrographic printing on a flat flexible dielectric medium comprising driving means for moving said medium along a path, excitation means along the path for applying a latent charge to said medium in response to variable signals to form variable latent images on said medium, a forms print station located along said path upstream of said excitation means for successively forming the same latent image on said medium and toner developer means disposed between said excitation means and said forms print station, for developing the latent images so fOrmed at said station, said forms print station comprising a roller fabricated of electrically insulated material in frictional engagement with said medium and rotated about its axis by movement of said medium, a print drum having characters extending from a surface thereof for forming said same latent image on each rotation of said drums which is rotatable about its axis, means biasing said print drum towards said roller, said drum further having a pair of rings extending outwardly from said surface thereof, one located adjacent either end of said drum for contacting said roller whereby said drum is rotated by movement of said roller, and means for applying a voltage to said drum to establish a difference of potential across the surface of said dielectric medium to produce a latent charge on the surface of said dielectric medium in the form of said print drum characters.
Claim 9
Dependent Claim
44 words
The apparatus of claim 6 wherein said means for establishing a difference in potential across said medium comprises a pair of electrodes located one on either side of said roller along the path of said medium and a voltage source connected to said drum.
Claim 10
Dependent Claim
28 words
The apparatus of claim 7 wherein said print drum is pivotably supported for movement of its rotational axis along an arc intersecting the rotational axis of said roller.
Claim 11
Dependent Claim
58 words
The apparatus of claim 8 which further includes means connected to said drum for indicating the beginning of each successive same image to be formed by rotation of said drum and stationary means adjacent said drum for sensing said indicating means and providing a signal to said excitation means in response to the sensing of said indicating means.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-05-27 | 1977-11-26 | 1978-05-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-05-27 | 1981-11-26 | 1982-05-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-05-27 | 1985-11-26 | 1986-05-28 | $7700.00 | Window Closed / Lapsed |