US4187774A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrostatic print marking apparatus
Assignee: Fujifilm Holdings Corp
•
Filing: 1978-03-14
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Granted: 1980-02-12
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Expires: 1998-03-14
Abstract
Abstract In an electrostatic print marking apparatus for printing markings on steel plates wherein an intermediate image carrying medium is used for transferring a toner image from an electrostatic image recording drum to a steel plate, a toner image transferred from the drum to the intermediate image carrying medium is re-charged before it is transferred from the image carrying medium to the steel plate.
Inventors
- 👤 Masakazu Iwasa
- 👤 Hisashi Kato
- 👤 Yoshio Kudo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 14:14
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/14; G03G15/16; G03G15/1625
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
115 words
An electrostatic print marking apparatus for printing markings on steel plates wherein an electrostatic latent image is developed into a toner image and the toner image is transferred to an intermediate image carrying medium, and the toner image transferred to the intermediate image carrying medium is transferred to a steel plate, wherein the improvement comprises a DC charger provided in the vicinity of said intermediate image carrying medium for re-charging the toner image carried on the intermediate image carrying medium before the toner is transferred to the steel plate in the same polarity as the polarity in which the toner image is charged before the toner image is transferred to the intermediate image carrying medium.
Claim 2
Dependent Claim
115 words
An electrostatic print marking apparatus for printing markings on steel plates wherein an electrostatic latent image is developed into a toner image and the toner image is transferred to an intermediate image carrying medium, and the toner image transferred to the intermediate image carrying medium is transferred to a steel plate, wherein the improvement comprises a DC charger provided in the vicinity of said intermediate image carrying medium for re-charging the toner image carried on the intermediate image carrying medium before the toner is transferred to the steel plate in the same polarity as the polarity in which the toner image is charged before the toner image is transferred to the intermediate image carrying medium.
Claim 3
Dependent Claim
31 words
An electrostatic print marking apparatus as claimed in claim 1 wherein said intermediate image carrying medium is a flexible belt consisting of a metallic substrate and a dielectric layer provided thereon.
References Cited (Backward Citations)
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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) | 1983-02-11 | 1983-08-13 | 1984-02-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-02-11 | 1987-08-13 | 1988-02-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-02-11 | 1991-08-13 | 1992-02-12 | $7700.00 | Window Closed / Lapsed |