US5070373A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fixing device
Assignee: Kyocera Mita Industrial Co Ltd
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Filing: 1990-02-22
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Granted: 1991-12-03
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Expires: 2010-02-22
Abstract
Abstract Disclosed is a fixing device wherein a pressure belt is rotated independently of a heating roller in the paper delivery direction by second driving means including a one-way clutch which allows racing thereof in the paper delivery direction. The pressure belt is rotated at a peripheral speed less than that of the heating roller by the second driving means. The fixing device can surely perform fixation without causing defective delivery or crumple regardless of papers or plastic films.
Inventors
- 👤 Masahiko Fukano
- 👤 Toshinori Muraoka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 01:06
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/20; G03G15/2003; G03G15/2014; G03G15/2064; G03G15/206; G03G2215/00; G03G2215/20; G03G2215/2003; G03G2215/2009
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
160 words
A device for fixing toner images transferred onto the surface of a paper comprising: (i) a heating roller; (ii) first driving means for driving said heating roller; (iii) a pressure belt which comes into contact with and is driven with said heating roller; and (iv) second driving means for driving said pressure belt at a lower peripheral speed than that of said heating roller when slippage occurs between said heating roller and the paper and between the paper and said pressure belt so that the peripheral speed of said pressure belt becomes lower than that of said heating roller, wherein the second driving means includes a one-way clutch which allows racing of said pressure belt in a paper delivery direction so that said pressure belt can be rotated at the same peripheral speed as that of said heating roller when the slippage does not occur between said heating roller and the paper and between the paper and said pressure belt.
Claim 2
Independent Claim
160 words
A device for fixing toner images transferred onto the surface of a paper comprising: (i) a heating roller; (ii) first driving means for driving said heating roller; (iii) a pressure belt which comes into contact with and is driven with said heating roller; and (iv) second driving means for driving said pressure belt at a lower peripheral speed than that of said heating roller when slippage occurs between said heating roller and the paper and between the paper and said pressure belt so that the peripheral speed of said pressure belt becomes lower than that of said heating roller, wherein the second driving means includes a one-way clutch which allows racing of said pressure belt in a paper delivery direction so that said pressure belt can be rotated at the same peripheral speed as that of said heating roller when the slippage does not occur between said heating roller and the paper and between the paper and said pressure belt.
Claim 3
Dependent Claim
23 words
A device according to claim 1 wherein the one-way clutch is for transmitting torque through rolling balls or rollers arranged around a shaft.
Claim 4
Dependent Claim
50 words
A device according to claim 1 wherein the second driving means includes a pair of flat gears which are rotated integrally with the heating roller and gear ratio thereof is set so that the pressure belt may be rotated at the peripheral speed less than that of the heating roller.
References Cited (Backward Citations)
GB321162A
Cited
US3637976A
Cited
US4231653A
Cited
US4523836A
Cited
GB2209709A
Cited
US4967237A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1994-12-02 | 1995-06-03 | 1995-12-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-12-02 | 1999-06-03 | 1999-12-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-12-02 | 2003-06-03 | 2003-12-03 | $7700.00 | Window Closed / Lapsed |