US4372247A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cold pressure fusing apparatus
Assignee: Pitney Bowes Inc
•
Filing: 1981-12-21
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Granted: 1983-02-08
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Expires: 2001-12-21
Abstract
Abstract Fusing apparatus for fixing toner material to a copy sheet. The apparatus comprises a pair of parallel, cold pressure fixing rollers, each of said rollers including a cylindrical metal tube open at both ends thereof, a cured elastomer occupying the volume enclosed by and bonded to said cylindrical tube, and a shaft extending through and bonded to said elastomer. The shaft is concentric with the tube. The apparatus also comprises means for applying a force to one of the two roller shafts to thereby apply a uniform pressure to the nip of the cold pressure fixing rollers.
Inventors
- 👤 Richard A. Calabrese
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 10:35
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/20; G03G15/2092; Y; Y10; Y10T; Y10T156/00; Y10T156/17; Y10T156/1702; Y10T156/1712; Y10T156/1741
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
94 words
Fusing apparatus for fixing toner material to a copy sheet, comprising: a pair of parallel, cold pressure fixing rollers, each of said rollers consisting of a cylindrical rigid metal tube open at both ends thereof, a cured elastomer occupying the volume enclosed by and bonded to said cylindrical tube, and a shaft extending through and bonded to said elastomer, said shaft being concentric with said tube; and means for applying a force to one of the two roller shafts to thereby apply a uniform pressure to the nip of the cold pressure fixing rollers.
Claim 2
Dependent Claim
94 words
Fusing apparatus for fixing toner material to a copy sheet, comprising: a pair of parallel, cold pressure fixing rollers, each of said rollers consisting of a cylindrical rigid metal tube open at both ends thereof, a cured elastomer occupying the volume enclosed by and bonded to said cylindrical tube, and a shaft extending through and bonded to said elastomer, said shaft being concentric with said tube; and means for applying a force to one of the two roller shafts to thereby apply a uniform pressure to the nip of the cold pressure fixing rollers.
Claim 3
Dependent Claim
10 words
The apparatus of claim 1, wherein the elastomer comprises urethane.
Claim 4
Dependent Claim
37 words
The apparatus of claim 1, wherein the force applying means comprises a pair of bolts which apply a force on the ends of said one roller shaft in a direction perpendicular to the axis of the shaft.
Claim 5
Dependent Claim
20 words
The apparatus of claim 3, wherein the outer diameter of the tube is about twice the diameter of the shaft.
Claim 6
Dependent Claim
18 words
The apparatus of claim 4, wherein the thickness of the tube is between about 1/8 and 1/4 inch.
References Cited (Backward Citations)
US3138695A
Cited
US3854975A
Cited
US3884623A
Cited
US3945723A
Cited
US4001544A
Cited
US3988817A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-02-07 | 1986-08-09 | 1987-02-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-02-07 | 1990-08-09 | 1991-02-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-02-07 | 1994-08-09 | 1995-02-08 | $7700.00 | Window Closed / Lapsed |