US3904786A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for fixing images by contact heating in a duplicator
Assignee: Fujifilm Business Innovation Corp
•
Filing: 1973-11-06
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Granted: 1975-09-09
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Expires: 1993-11-06
Abstract
Abstract A process for fixing images by contact heating in a duplicator comprising passing a thermoplastic resin powder image formed on a support between at least two heating rollers disposed in proximity to each other; heating the roller as disposed on the image side of the support to a temperature less than the temperature of the roller disposed on the side opposite the image side so that a temperature gradient is produced in the thermoplastic resin powder image to prevent said thermoplastic resin powder image from adhering to the roller disposed on the image side.
Inventors
- 👤 Koichi Takiguchi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 15:21
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/20; G03G15/2003; G03G15/2014; G03G15/2064; G03G13/00; G03G13/20; Y; Y10; Y10S; Y10S101/00; Y10S101/37
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
118 words
A PROCESS FOR FIXING IMAGES BY CONTACT HEATING IN A DUPLICATOR COMPRISING PASSING A THERMOLPASTIC RESIN POWER IMAGE FORMED ON A SUPPORT BETWEEN AT LEAST TWO HEATING ROLLERS DISPOSED IN PROXIMITY TO EACH OTHER HEATING THE ROLLER DISPOSED ON THE IMAGE SIDE OF SAID SUPPORT TO A HIGH ENOUGH TEMPERATURE TO SOFTEN SAID THERMOPLASTIC RESIN POWDER IMAGE WHEN IN CONTACT THEREWITH AND HEATING THE ROLLER DISPOSED ON THE SIDE OPPOSITE THE IMAGE SIDE TO A TEMPERATURE HIGH ENOUGH TO MELT SAID THEROMOPLASTIC RESIN POWDER IMAGE THROUGH THE SUPPORT SO THAT A TEMPERATURE GRADIENT IS PRODUCED IN SAID THREMOPLASTIC RESIN POWDER IMAGE TO PREVENT SAID THERMOPLASTIC RESIN POWDER IMAGE FROM ADHERING TO THE ROLLER DISPOSED ON THE IMAGE SIDE.
Claim 2
Dependent Claim
118 words
A PROCESS FOR FIXING IMAGES BY CONTACT HEATING IN A DUPLICATOR COMPRISING PASSING A THERMOLPASTIC RESIN POWER IMAGE FORMED ON A SUPPORT BETWEEN AT LEAST TWO HEATING ROLLERS DISPOSED IN PROXIMITY TO EACH OTHER HEATING THE ROLLER DISPOSED ON THE IMAGE SIDE OF SAID SUPPORT TO A HIGH ENOUGH TEMPERATURE TO SOFTEN SAID THERMOPLASTIC RESIN POWDER IMAGE WHEN IN CONTACT THEREWITH AND HEATING THE ROLLER DISPOSED ON THE SIDE OPPOSITE THE IMAGE SIDE TO A TEMPERATURE HIGH ENOUGH TO MELT SAID THEROMOPLASTIC RESIN POWDER IMAGE THROUGH THE SUPPORT SO THAT A TEMPERATURE GRADIENT IS PRODUCED IN SAID THREMOPLASTIC RESIN POWDER IMAGE TO PREVENT SAID THERMOPLASTIC RESIN POWDER IMAGE FROM ADHERING TO THE ROLLER DISPOSED ON THE IMAGE SIDE.
Claim 3
Dependent Claim
32 words
A process as in claim 1 where said roller disposed on the image side of said support is coated with a material which readily releases said thermoplastic resin powder from the coating.
Claim 4
Dependent Claim
30 words
A process as in claim 1 where roller disposed on the image side of said support is coated at or near the surface thereof with a material softer than metal.
Claim 5
Dependent Claim
32 words
A process as in claim 1 including cleaning the roller disposed on the image side of said support with a material which readily releases said thermoplastic resin powder from said last-mentioned roller.
Claim 6
Dependent Claim
15 words
A process as in claim 1 where heat is applied to both of said rollers.
Claim 7
Dependent Claim
39 words
A process as in claim 1 where heat is applied to said roller and is disposed on the side opposite the image side and said roller on the image side of said support being heated from the first-mentioned roller.
Claim 8
Dependent Claim
27 words
A process as in claim 1 where heat is applied to at least one of said rollers by a heating element centrally mounted with said one roller.
Claim 9
Dependent Claim
28 words
A process as in claim 1 where heat is applied to at least one of said rollers by a heating element contacting the periphery of said one roller.
Claim 10
Dependent Claim
17 words
A process as in claim 1 where the temperature difference between said rollers is at least 10*C.
References Cited (Backward Citations)
US3060051A
Cited
US3268351A
Cited
US3332347A
Cited
US3682738A
Cited
US3669707A
Cited
US3770346A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-09-08 | 1979-03-10 | 1979-09-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-09-08 | 1983-03-10 | 1983-09-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-09-08 | 1987-03-10 | 1987-09-09 | $7700.00 | Window Closed / Lapsed |