Patent US3868744A successfully refreshed from Google Patents.
US3868744A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cleaning apparatus for heated pressure roll fuser
Assignee: Xerox Corp
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Filing: 1972-11-24
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Granted: 1975-03-04
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Expires: 1992-11-24
Abstract
Abstract An improved cleaning apparatus for cleaning the residual toner particles from the heated fuser roll of a heated pressure fusing system in an electrostatic copy machine. The improved cleaning apparatus includes a carriage supporting a plurality of cleaning rollers in contact with the surface of the heated fuser roll. A pressure loading mechanism applies a force of about 4 to 8 pounds onto the carriage and cleaning rollers against the surface of the heated fuser roll. Each cleaning roller has a core member which is wrapped in a soft thermally insulating material such that under the pressure loading condition the surface of the cleaning roller conforms to that of the heated fuser roll. The exterior surface of each cleaning roller has a toner coating mixed with silicone oil to insure proper release of the residual toner from the heated fuser roll onto the cleaning roller.
Inventors
- 👤 Raghulinga R Thettu
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 21:08
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/20; G03G15/2003; G03G15/2014; G03G15/2017; G03G15/2025
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
142 words
In a fusing system for fusing toner images in an electrostatic copying machine in which a relatively hard heated roll surface is used to fix the toner images to copy sheet material, an improved cleaning apparatus for cleaning toner offset onto the heated roll surface comprising a carriage means supporting at least one cleaning roller member in contact with the heated roll surface to be cleaned, pressure loading means for urging said carriage means towards the heated roll surface at a predetermined pressure, said cleaning roller being exteriorly coated with toner layer covered with a silicone oil film to create sufficient surface energy to collect toner from the heated roll surface, said cleaning roller member further including a core member having a soft deformable thermally insulating cover means to conform to the surface of the heated roll to effect uniform cleaning thereof.
Claim 2
Dependent Claim
142 words
In a fusing system for fusing toner images in an electrostatic copying machine in which a relatively hard heated roll surface is used to fix the toner images to copy sheet material, an improved cleaning apparatus for cleaning toner offset onto the heated roll surface comprising a carriage means supporting at least one cleaning roller member in contact with the heated roll surface to be cleaned, pressure loading means for urging said carriage means towards the heated roll surface at a predetermined pressure, said cleaning roller being exteriorly coated with toner layer covered with a silicone oil film to create sufficient surface energy to collect toner from the heated roll surface, said cleaning roller member further including a core member having a soft deformable thermally insulating cover means to conform to the surface of the heated roll to effect uniform cleaning thereof.
Claim 3
Dependent Claim
14 words
Apparatus to claim 1 wherein said toner layer thickness is at least .001 inches.
Claim 4
Dependent Claim
19 words
Apparatus according to claim 2 wherein said silicone oil film thickness ranges from about .005 to about .1 microns.
Claim 5
Dependent Claim
14 words
Apparatus according to claim 1 wherein said insulating cover means is in braided form.
Claim 6
Dependent Claim
15 words
Apparatus according to claim 1 wherein said insulating cover means is wrapped in spiral form.
Claim 7
Dependent Claim
14 words
Apparatus according to claim 1 wherein said insulating cover means is in tubular form.
Claim 8
Dependent Claim
24 words
Apparatus according to claim 1 wherein said core member is supported to rotate on bearings mounted on a shaft fixed to said carriage means.
Claim 9
Dependent Claim
21 words
Apparatus according to claim 7 wherein said pressure loading means exerts a force ranging from about 4 to about 8 pounds.
Claim 10
Dependent Claim
18 words
Apparatus according to claim 8 wherein at least two cleaning roller members are supported on the carriage means.
Claim 11
Dependent Claim
135 words
In a fusing system for fusing toner images in an electrostatic copying machine in which a relatively hard heated roll surface is used to fix the toner images to copy sheet material, an improved cleaning apparatus for cleaning toner offset onto the heated roll surface comprising a carriage supporting at least one cleaning roller member in contact with the heated roll surface to be cleaned, pressure loading means for urging said carriage towards the heated roll surface at a predetermined pressure, said cleaning roller being exteriorly coated with a thermoplastic layer to create sufficient surface energy to collect toner from the heated roll surface, said cleaning roller member further including a core member have a soft deformable thermally insulating cover means to conform to the surface of the heated roll to effect uniform cleaning thereof.
Claim 12
Dependent Claim
135 words
In a fusing system for fusing toner images in an electrostatic copying machine in which a relatively hard heated roll surface is used to fix the toner images to copy sheet material, an improved cleaning apparatus for cleaning toner offset onto the heated roll surface comprising a carriage supporting at least one cleaning roller member in contact with the heated roll surface to be cleaned, pressure loading means for urging said carriage towards the heated roll surface at a predetermined pressure, said cleaning roller being exteriorly coated with a thermoplastic layer to create sufficient surface energy to collect toner from the heated roll surface, said cleaning roller member further including a core member have a soft deformable thermally insulating cover means to conform to the surface of the heated roll to effect uniform cleaning thereof.
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) | 1978-03-03 | 1978-09-02 | 1979-03-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-03-03 | 1982-09-02 | 1983-03-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-03-03 | 1986-09-02 | 1987-03-04 | $7700.00 | Window Closed / Lapsed |