System for processing large xerographic prints
Abstract
Abstract PRESENT XEROGRAPHY SYSTEMS IMPRESS AN IMAGE ON AN ELECTROSTATIC SHEET OR FILM BY CHARGING THE ENTIRE AREA OF THE SHEET AND THEN EXPOSING THAT AREA TO THE IMAGE AND THEN APPLYING TONER TO THAT AREA TO DEVELOP THE IMAGE IMPRESSED ON THE FILM TO PERMANENT VISIBLE FORM. THE PRESENT SYSTEM CHARGES, EXPOSES AND TONES A LARGE AREA ELECTROSTATIC SHEET OR FILM IN SECTIONS BY POSITIONING A VERTICALLY MOVING CURTAIN BETWEEN THE FILM AND THE LENS SYSTEM. HORIZONTAL CORONA DISCHAGE PRODUCING ELECTRODES, A HORIZONTAL WINDOW AND THE HORIZONTAL WIPER BLADE ARE SPACED ONE ABOVE THE OTHER ON THE CURTAIN. AS THE CURTAIN MOVES DOWNWARD, AND ELECTRODES CHARGE PROGRESSIVELY LOWER AREAS OF THE FILM ACROSS ITS FULL WIDTH. THEN THE DOWNWARDLY MOVING HORIZONTAL WINDOW EXPOSES THESE AREAS, IN TURN, TO PROGRESSIVELY LOWER PORTIONS OF THE IMAGE PROJECTED FROM THE LENS SYSTEM SO THAT A LATENT IMAGE IS FOUND ON THE FILM. FINALLLY, THE DOWNWARDLY MOVING WIPER BLADE SPREADS TONER FROM AN ADJACENT SUPPLY UNIFORMILY OVER PROGRESSIVELY LOWER AREAS OF THE EXPOSED FILM SO THAT A HIGH-QUALITY VISIBLE IMAGE IS IMPRESSED ON THE FILM.
Inventors
- 👤 Manfred R Kuehnle
Bibliographic Details
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1975-06-20 | 1975-12-20 | 1976-06-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-06-20 | 1979-12-20 | 1980-06-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-06-20 | 1983-12-20 | 1984-06-20 | $7700.00 | Window Closed / Lapsed |