US3672764A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrostatic copier with removable cleaning module
Assignee: Agfa Gevaert AG
•
Filing: 1970-12-02
•
Granted: 1972-06-27
•
Expires: 1990-12-02
Abstract
Abstract A ROTATABLE DRUM CARRYING A PHOTOCONDUCTIVE LAYER IS MOUNTED IN A HOUSING OF A COPIER. A CLEANING MODULE IS CONNECTABLE WITH AND DISCONNECTABLE FROM THE HOUSING INTO AND COMPRISES A PAY-OFF ROLLER AND A TAKE-UP ROLLER, A CLEANING TAPE WHICH IS CONVOLUTED ABOUT THE ROLLERS, A BIASING ARRANGMENT WHICH BIASES INCREMENTS OF THE CLEANING TAPE INTO CONTACT WITH THE TRAVELLING PHOTOCONDUCTIVE LAYER FOR FRICTIONAL REMOVAL OF SURFACE CONTAMINANTS THEREFROM, AND A DRIVE FOR INCREMENTALLY ADVANCING THE TAPE FROM THE PAY-OFF ROLLER TO THE TAKE-UP ROLLER.
Inventors
- 👤 Karl Hartwig
- 👤 Herbert Engel And Gunt Schnall
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 01:05
CPC Classifications
G; G03; G03G; G03G21/00; G03G21/0005; G03G21/0041
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-06-27 | 1975-12-27 | 1976-06-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-06-27 | 1979-12-27 | 1980-06-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-06-27 | 1983-12-27 | 1984-06-27 | $7700.00 | Window Closed / Lapsed |