US4234248A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hot roll fuser
Assignee: Pitney Bowes Inc
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Filing: 1979-06-04
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Granted: 1980-11-18
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Expires: 1999-06-04
Abstract
Abstract A heated fuser member for use in an electrostatic copying machine formed of a roll structure whose outer surface comprises graphite is disclosed.
Inventors
- 👤 Christian A. Beck
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 00:22
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/20; G03G15/2003; G03G15/2014; G03G15/2053; G03G15/2057
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
83 words
In an electrostatic copying machine in which the fusing apparatus for fixing toner images to a support surface comprises a heated fuser member in pressure contact with a backup member, and fusing is accomplished by passing the support surface with the toner images thereon between the heated fuser member and backup member thereby applying heat and pressure to the toner image, an improved roll type fuser member whose outer surface comprises graphite, said graphite comprising less than about 0.5 percent by weight carbon.
Claim 2
Dependent Claim
83 words
In an electrostatic copying machine in which the fusing apparatus for fixing toner images to a support surface comprises a heated fuser member in pressure contact with a backup member, and fusing is accomplished by passing the support surface with the toner images thereon between the heated fuser member and backup member thereby applying heat and pressure to the toner image, an improved roll type fuser member whose outer surface comprises graphite, said graphite comprising less than about 0.5 percent by weight carbon.
Claim 3
Dependent Claim
19 words
A heated fuser roll according to claim 1 wherein said fuser roll is made of a hollow graphite cylinder.
Claim 4
Dependent Claim
24 words
A heated fuser roll according to claim 2 wherein said cylinder has a wall thickness ranging from about 0.125 inches to about 0.5 inches.
Claim 5
Dependent Claim
28 words
A heated fuser roll according to claim 2 wherein the outer surface of the fuser roll is heated by a heating means disposed internally within said graphite cylinder.
Claim 6
Dependent Claim
18 words
A heated fuser roll according to claim 2 wherein said backup member is deformable by said graphite cylinder.
Claim 7
Dependent Claim
24 words
A heated fuser roll according to claim 4 wherein said backup member is a roll structure comprising an outer surface of a silicone rubber.
Claim 8
Dependent Claim
22 words
A heated fuser roll according to claim 4 wherein said backup member is a roll structure comprising an outer surface of polytetrafluoroethylene.
Claim 9
Dependent Claim
16 words
A heated fuser roll according to claim 4 wherein said backup member is a resilient belt.
Claim 10
Dependent Claim
101 words
In an electrostatic copying machine in which the fusing apparatus for fixing toner images to a support surface comprises a heated fuser member in pressure contact with a backing member, and fusing is accomplished by passing the support surface with the toner images thereon between the heated fuser member and backup member thereby applying heat and pressure to the toner image, an improved roll type fuser member comprising a hollow cylinder whose wall thickness ranges from about 0.125 inches to about 0.5 inches, the cylinder being made of a material comprising graphite with less than about 0.5 percent by weight carbon.
Claim 11
Dependent Claim
101 words
In an electrostatic copying machine in which the fusing apparatus for fixing toner images to a support surface comprises a heated fuser member in pressure contact with a backing member, and fusing is accomplished by passing the support surface with the toner images thereon between the heated fuser member and backup member thereby applying heat and pressure to the toner image, an improved roll type fuser member comprising a hollow cylinder whose wall thickness ranges from about 0.125 inches to about 0.5 inches, the cylinder being made of a material comprising graphite with less than about 0.5 percent by weight carbon.
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) | 1983-11-18 | 1984-05-19 | 1984-11-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-11-18 | 1988-05-19 | 1988-11-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-11-18 | 1992-05-19 | 1992-11-18 | $7700.00 | Window Closed / Lapsed |