US4485066A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making elastomer-coated hot roll
Assignee: IBM Information Products Corp
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Filing: 1983-02-08
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Granted: 1984-11-27
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Expires: 2003-02-08
Abstract
Abstract A hot roll, for use in a xerographic hot roll fuser, is made by coating a hollow aluminum cylinder with an elastomer, as by the use of an injection molding machine. After molding, the external surface of the elastomer cylinder is ground slightly to improve its concentricity. Thereafter, this ground external surface is subjected to the chemical influence of an acid. After a predetermined time period, the acid treatment is terminated and the roll is washed in water. The resulting hot roll, whose external surface has been chemically modified, possesses improved dry-release properties.
Inventors
- 👤 Vernon M. Balthis
- 👤 Howard E. Evans
- 👤 James C. Minor
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 01:50
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/20; G03G15/2003; G03G15/2014; G03G15/2053; G03G15/2057
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
69 words
In a method of making a xerographic hot roll, for use in a hot roll fuser, wherein a filler-containing elastomeric sleeve is ground to form a generally circular-cylinder shape, the improvement comprising: treating the ground external surface of the sleeve with a strong elastomer-solvent, which dissolves said external surface, to thereby cause a filler-free external surface skin to form on said sleeve, thereby improving the sleeve's paper/toner release property.
Claim 2
Dependent Claim
69 words
In a method of making a xerographic hot roll, for use in a hot roll fuser, wherein a filler-containing elastomeric sleeve is ground to form a generally circular-cylinder shape, the improvement comprising: treating the ground external surface of the sleeve with a strong elastomer-solvent, which dissolves said external surface, to thereby cause a filler-free external surface skin to form on said sleeve, thereby improving the sleeve's paper/toner release property.
Claim 3
Dependent Claim
11 words
The method of claim 1 wherein the solvent is an acid.
Claim 4
Dependent Claim
17 words
The method of claim 1 wherein the elastomer is a silicone and the solvent is trifluoroacetic acid.
Claim 5
Dependent Claim
41 words
The method of claim 3 wherein the elastomer is a filler-containing polydimethyl siloxane, including the steps of subjecting said elastomer to full-strength acid for about one minute, and then water-washing said elastomer to remove the acid, followed by drying said elastomer.
Claim 6
Dependent Claim
18 words
The method of claim 2 wherein the acid is selected from the group sulphuric, acetic or trifluoroacetic acid.
Claim 7
Dependent Claim
11 words
The method of claim 2 wherein the elastomer is a silicone.
Claim 8
Dependent Claim
45 words
The method of claim 6 wherein the elastomer is a filler-containing polydimethyl siloxane includes silica as filler, including the steps of subjecting said elastomer to said acid for about one minute, and then water-washing said elastomer to remove the acid, followed by drying said elastomer.
Claim 9
Dependent Claim
57 words
The method of claim 1 wherein the elastomer is a silicone and the solvent is trifluoroacetic acid, and wherein the step of treating the external surface of the sleeve comprises subjecting the sleeve to said acid for a period of about one minute, at a temperature of about 22° C., followed by a water-wash of said sleeve.
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) | 1987-11-27 | 1988-05-28 | 1988-11-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-11-27 | 1992-05-28 | 1992-11-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-11-27 | 1996-05-28 | 1996-11-27 | $7700.00 | Window Closed / Lapsed |