US3716018A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for heating and fixing toner images upon a recording medium
Assignee: Ricoh Co Ltd
•
Filing: 1970-10-06
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Granted: 1973-02-13
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Expires: 1990-10-06
Abstract
Abstract A non-adhesive endless belt is used for heating and fixing toner images upon a recording medium by mounting the belt on a roller having means for heating it and on a driving roller spaced apart from the heated roller means. The recording medium is passed closely adjacent to or with its toner-carrying surface in contact with the surface of the heated belt to fuse the toner in the form of the image on the recording medium. Cleaning means and a preheated pressure roller are also provided to improve the quality of the fused toner image.
Inventors
- 👤 W Ohta
- 👤 K Kasuya
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 13:10
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/20; G03G15/2003; G03G15/2007; G03B; G03B27/00; G03B27/02; G03B27/14; G03B27/30; G03B27/306; G03G15/2014; G03G15/2064; G03G2215/00; G03G2215/20; G03G2215/2003; G03G2215/2016; G03G2215/2025; G03G2215/2032
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
113 words
A device for heating and fixing a toner image upon a toner-carrying recording medium being transported thereby comprising: a. a heating roller disposed adjacent the path of travel of said recording medium; b. an endless belt made of a thermostable substance and mounted for travel around said heating roller so as to transfer heat from said roller to the toner-carrying surface of said recording medium to fuse the toner thereon; c. means for driving said endless belt in the same direction as that of said recording medium; and d. a preheated pressure roller positioned opposite said heating roller and cooperating with said heating roller to pass said recording medium under pressure between them.
Claim 2
Independent Claim
113 words
A device for heating and fixing a toner image upon a toner-carrying recording medium being transported thereby comprising: a. a heating roller disposed adjacent the path of travel of said recording medium; b. an endless belt made of a thermostable substance and mounted for travel around said heating roller so as to transfer heat from said roller to the toner-carrying surface of said recording medium to fuse the toner thereon; c. means for driving said endless belt in the same direction as that of said recording medium; and d. a preheated pressure roller positioned opposite said heating roller and cooperating with said heating roller to pass said recording medium under pressure between them.
Claim 3
Independent Claim
113 words
A device for heating and fixing a toner image upon a tonercarrying recording medium being transported thereby comprising: a. a heating roller disposed adjacent the path of travel of said recording medium; b. an endless belt made of a thermostable substance and mounted for travel around said heating roller so as to transfer heat from said roller to the toner-carrying surface of said recording medium to fuse the toner thereon; c. means for driving said endless belt in the same direction as that of said recording medium; and d. a preheated pressure roller positioned opposite said heating roller and cooperating with said heating roller to pass said recording medium under pressure between them.
Claim 4
Independent Claim
113 words
A device for heating and fixing a toner image upon a tonercarrying recording medium being transported thereby comprising: a. a heating roller disposed adjacent the path of travel of said recording medium; b. an endless belt made of a thermostable substance and mounted for travel around said heating roller so as to transfer heat from said roller to the toner-carrying surface of said recording medium to fuse the toner thereon; c. means for driving said endless belt in the same direction as that of said recording medium; and d. a preheated pressure roller positioned opposite said heating roller and cooperating with said heating roller to pass said recording medium under pressure between them.
Claim 5
Dependent Claim
16 words
The device defined in claim 1 wherein said endless belt is made of a non-adhesive material.
Claim 6
Dependent Claim
17 words
The device defined in claim 1 wherein said heating roller is spaced apart from said belt-driving means.
Claim 7
Dependent Claim
16 words
The device defined in claim 1, including means for cleaning the surface of said endless belt.
Claim 8
Dependent Claim
14 words
The device defined in claim 4 wherein said cleaning means is a rotating brush.
Claim 9
Dependent Claim
25 words
The device defined in claim 1 wherein an application means is provided for applying a non-adhesive coating upon the surface of said non-adhesive endless belt.
Claim 10
Dependent Claim
19 words
The device defined in claim 6 wherein said application means is a application roller coated with a permeable substance.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-02-13 | 1976-08-14 | 1977-02-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-02-13 | 1980-08-14 | 1981-02-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-02-13 | 1984-08-14 | 1985-02-13 | $7700.00 | Window Closed / Lapsed |