US4277160A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrostatic printer
Assignee: Toshiba Corp
•
Filing: 1979-09-06
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Granted: 1981-07-07
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Expires: 1999-09-06
Abstract
Abstract An electrostatic printer comprises a movable photosensitive body, a cathode ray tube adapted to transmit a light image to the photosensitive body through an optical fiber plate located near the photosensitive body to form an electrostatic image on the photosensitive body, a developing unit, a fixer, a transparent film provided between the photosensitive body and the optical fiber plate such that it covers and contacts with the optical fiber plate, the transparent film being moved in a direction opposite to that in which the photosensitive body is moved and a roller contacting the film and urging it into contact with the plate to eliminate any slack.
Inventors
- 👤 Yoshihiro Yamada
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 21:26
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/22; G03G15/04; G03G15/04036; G03G15/04045; G03G15/32; G03G15/326
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
134 words
An electrostatic printer comprising: (1) a movable photosensitive body; (2) means having a cathode ray tube and adapted to transmit a light image to the photosensitive body through an optical fiber plate located near the photosensitive body to form an electrostatic image on the photosensitive body; (3) means for developing the electrostatic image; (4) means for fixing a developed image to a paper; (5) a transparent film provided between the photosensitive body and the optical fiber plate such that it covers and contacts with the optical fiber plate, said transparent film being moved in a direction opposite to that in which the photosensitive body is moved; and (6) urging means provided in pressure contact with the transparent film to impart a tension to the latter so that said film contacts said plate without slack.
Claim 2
Dependent Claim
134 words
An electrostatic printer comprising: (1) a movable photosensitive body; (2) means having a cathode ray tube and adapted to transmit a light image to the photosensitive body through an optical fiber plate located near the photosensitive body to form an electrostatic image on the photosensitive body; (3) means for developing the electrostatic image; (4) means for fixing a developed image to a paper; (5) a transparent film provided between the photosensitive body and the optical fiber plate such that it covers and contacts with the optical fiber plate, said transparent film being moved in a direction opposite to that in which the photosensitive body is moved; and (6) urging means provided in pressure contact with the transparent film to impart a tension to the latter so that said film contacts said plate without slack.
Claim 3
Dependent Claim
16 words
An electrostatic printer according to claim 1 further including means for winding back said transparent film.
Claim 4
Dependent Claim
30 words
An electrostatic printer according to claim 2 in which, when the transparent film is wound back, said urging means acts as a cleaner for removing toner deposited on the film.
Claim 5
Dependent Claim
18 words
An electrostatic printer according to claim 1 in which said urging means is comprised of a rotatable roller.
Claim 6
Dependent Claim
26 words
An electrostatic printer according to claim 1 further including drive means for moving said film in synchronism with a copying signal from said cathode ray tube.
Claim 7
Dependent Claim
48 words
An electrostatic printer according to claim 1 in which said transparent film is urged by said urging means on the side of a film supply roll so that a proper tension is imparted to the film between the optical fiber plate and the surface of a photosensitive body.
References Cited (Backward Citations)
US3641605A
Cited
US3890038A
Cited
JPS49125038A
Cited
US3941558A
Cited
US4074217A
Cited
US4025181A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-07-06 | 1985-01-05 | 1985-07-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-07-06 | 1989-01-05 | 1989-07-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-07-06 | 1993-01-05 | 1993-07-07 | $7700.00 | Window Closed / Lapsed |