Patent US3561868A successfully refreshed from Google Patents.
US3561868A
Expired / Lapsed
US
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Cooling arrangement for a copying machine
Assignee: Individual
•
Filing: 1968-04-01
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Granted: 1971-02-09
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Expires: 1988-04-01
Abstract
Abstract A THERMO COPIER HAS A TRANSPARENT TUBULAR ROLLER COPERATING WITH A COUNTERPRESSURE ROLLER. A SOURCE OF INFRARED RADIATION IN THE INTERIOR OF THE TRANSPARENT ROLLER HEATS SHEETS PASSING BETWEEN THE ROLLERS, AND ALSO THE ROLLERS. A BLOWER DISCHARGES AN AIRSTREAM AGAINST THE COUNTERPRESSURE ROLLER BY WHICH THE AIRSTREAM IS DIVIDED INTO TWO COOLING AIRSTREAMS FLOWING TRANSVERSELY TO THE AXES OF THE ROLLERS ABOVE AND BELOW THE SAME AND BEING DISCHARGED THROUGH SEPARATE OUTLET OPENING.
Inventors
- 👤 Gerhard Ritzerfeld
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 13:18
CPC Classifications
G; G03; G03B; G03B27/00; G03B27/02; G03B27/14; G03B27/30; G03B27/306; B; B41; B41L; B41L19/00; B41L19/003
Claims Analysis
Total Claims: 0
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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) | 1974-02-08 | 1974-08-10 | 1975-02-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-08 | 1978-08-10 | 1979-02-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-08 | 1982-08-10 | 1983-02-09 | $7700.00 | Window Closed / Lapsed |