US3356831A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Xerographic fusing apparatus
Assignee: Xerox Corp
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Filing: 1964-12-23
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Granted: 1967-12-05
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Expires: 1984-12-23
Abstract
No abstract record available.
Inventors
- 👤 Paul G Andrus
- 👤 John F Byrne
- 👤 Frederick W Hudson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 16:03
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/20; G03G15/2003; G03G15/2014
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
106 words
IN A XEROGRAPHIC REPRODUCING UNTI WHEREIN POWDER IMAGES ARE LOOSELY SUPPORTED ON A MOVING SUPPORT SURFACE, A HEAT FUSING APPARATUS FOR FIXING A POWDER IMAGE TO SAID SUPPORT SURFACE, SAID HEAT FUSING APPARATUS COMPRISING IN COMBINATION: (A) HEATING MEANS IN THERMAL CONTACT WITH THE MOVING SUPPORT SURFACE TO EFFECT FUSING OF THE POWDER IMAGE THEREON, AND (B) A HEAT EXCHANGE UNIT INCLUDING THERMAL TRANSFER MEANS SUPPORTED IN HEAT EXCHANGE RELATION BETWEEN PORTIONS OF THE MOVING SUPPORT SURFACE APPROACHING THE PAST CONTACT WITH SAID HEATING MEANS TO TRANSFER HEAT FROM THE LATTER TO THE FORMER PORTIONS OF SAID MOVING SUPPORT SURFACE TO PREHEAT THE APPROACHING SUPPORT SURFACE.
Claim 2
Dependent Claim
106 words
IN A XEROGRAPHIC REPRODUCING UNTI WHEREIN POWDER IMAGES ARE LOOSELY SUPPORTED ON A MOVING SUPPORT SURFACE, A HEAT FUSING APPARATUS FOR FIXING A POWDER IMAGE TO SAID SUPPORT SURFACE, SAID HEAT FUSING APPARATUS COMPRISING IN COMBINATION: (A) HEATING MEANS IN THERMAL CONTACT WITH THE MOVING SUPPORT SURFACE TO EFFECT FUSING OF THE POWDER IMAGE THEREON, AND (B) A HEAT EXCHANGE UNIT INCLUDING THERMAL TRANSFER MEANS SUPPORTED IN HEAT EXCHANGE RELATION BETWEEN PORTIONS OF THE MOVING SUPPORT SURFACE APPROACHING THE PAST CONTACT WITH SAID HEATING MEANS TO TRANSFER HEAT FROM THE LATTER TO THE FORMER PORTIONS OF SAID MOVING SUPPORT SURFACE TO PREHEAT THE APPROACHING SUPPORT SURFACE.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-12-04 | 1971-06-05 | 1971-12-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-12-04 | 1975-06-05 | 1975-12-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-12-04 | 1979-06-05 | 1979-12-05 | $7700.00 | Window Closed / Lapsed |