US4065586A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fixing method using polyarylsiloxanes as release agents
Assignee: Xerox Corp
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Filing: 1976-03-01
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Granted: 1977-12-27
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Expires: 1996-03-01
Abstract
Abstract Polyarylsiloxanes are used on fusing devices in photocopiers to fix particulate thermoplastic toner to a substrate while the toner is in a fused state. The polyarylsiloxanes can be continuously applied in minimal thicknesses on the fusing device to form a thermally stable, renewable, self-cleaning layer having excellent toner release properties. A preferred polyarylsiloxane is polyphenylmethyl dimethyl siloxane.
Inventors
- 👤 Clifford O. Eddy
- 👤 Thomas R. Hoffend
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 14:28
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/20; G03G15/2003; G03G15/2014; G03G15/2017; G03G15/2025
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
126 words
The method of fusing electroscopic toner images to a substrate including the steps of: a. forming a film on a heated metal fuser member in an electrostatic reproducing apparatus, said film being a barrier to electroscopic toner and comprising the product resulting from the interaction of the fuser member and a polyarylsiloxane having at least about 0.5 aryl group or substituted aryl group per molecule which interacts with the fuser member surface, said polyarylsiloxane being fluid at the temperature of the fuser member and acting as a release fluid film for the electroscopic toner; b. contacting the toner images on said substrate with the coated, heated fuser member for a period of time sufficient to soften the electroscopic toner; and c. allowing the toner to cool.
Claim 2
Independent Claim
126 words
The method of fusing electroscopic toner images to a substrate including the steps of: a. forming a film on a heated metal fuser member in an electrostatic reproducing apparatus, said film being a barrier to electroscopic toner and comprising the product resulting from the interaction of the fuser member and a polyarylsiloxane having at least about 0.5 aryl group or substituted aryl group per molecule which interacts with the fuser member surface, said polyarylsiloxane being fluid at the temperature of the fuser member and acting as a release fluid film for the electroscopic toner; b. contacting the toner images on said substrate with the coated, heated fuser member for a period of time sufficient to soften the electroscopic toner; and c. allowing the toner to cool.
Claim 3
Dependent Claim
34 words
The method of claim 1 comprising continuously depositing the polyarylsiloxane on the heated fuser member to maintain a toner barrier coating and fluid toner release film of at least about 0.5 micron in thickness.
Claim 4
Dependent Claim
20 words
The method of claim 2 wherein the thickness of the film is maintained at about 1 to about 4 microns.
Claim 5
Dependent Claim
12 words
The method of claim 1 comprising fusing the electroscopic toner to paper.
Claim 6
Dependent Claim
29 words
The method of claim 1 comprising contacting the heated fuser member with said polyarylsiloxane which is a solid or liquid at ambient temperature and a liquid at operating temperature.
Claim 7
Dependent Claim
17 words
The method of claim 1 comprising applying said polyarylsiloxane to a fuser member having a copper surface.
Claim 8
Dependent Claim
17 words
The method of claim 1 comprising applying said polyarylsiloxane to a fuser member having a steel surface.
Claim 9
Dependent Claim
17 words
The method of claim 1 comprising applying said polyarylsiloxane to a fuser member having an aluminum surface.
Claim 10
Independent Claim
182 words
A method of fusing toner images to a substrate including the steps of: a. coating the surface of a heated metal fuser member in an electrostatic reproducing apparatus with a polyarylsiloxane release material, said polyarylsiloxane release material being the type capable of interacting with the surface of the fuser member, said coating comprising a first barrier portion in contact with the surface of the fuser member, said first portion being formed during operation of the apparatus at the interface of the fuser member and the polyarylsiloxane release material, the first portion having a greater affinity for the high surface energy material of the fuser member surface than the toner and thereby preventing toner from contacting the fuser member surface, and a second release portion, the release portion being the fluid polyarylsiloxane release material having a cohesive force which is less than the adhesive forces between the toner and the substrate and the cohesive forces of the toner; b. contacting the toner images on said substrate for a period of time sufficient to soften the toner; and c. allowing the toner to cool.
Claim 11
Independent Claim
182 words
A method of fusing toner images to a substrate including the steps of: a. coating the surface of a heated metal fuser member in an electrostatic reproducing apparatus with a polyarylsiloxane release material, said polyarylsiloxane release material being the type capable of interacting with the surface of the fuser member, said coating comprising a first barrier portion in contact with the surface of the fuser member, said first portion being formed during operation of the apparatus at the interface of the fuser member and the polyarylsiloxane release material, the first portion having a greater affinity for the high surface energy material of the fuser member surface than the toner and thereby preventing toner from contacting the fuser member surface, and a second release portion, the release portion being the fluid polyarylsiloxane release material having a cohesive force which is less than the adhesive forces between the toner and the substrate and the cohesive forces of the toner; b. contacting the toner images on said substrate for a period of time sufficient to soften the toner; and c. allowing the toner to cool.
Claim 12
Dependent Claim
24 words
The method of claim 9 wherein the polyarylsiloxane release material is a solid or liquid at room temperature and a fluid at operating temperatures.
Claim 13
Dependent Claim
32 words
The method of claim 9 wherein the thickness of the polyarylsiloxane release material on the surface of the heated fuser member is sufficiently thin to constitute a minimal barrier to heat transfer.
Claim 14
Dependent Claim
24 words
The method of claim 11 wherein the thickness of the polyarylsiloxane release material on the fuser member is about 0.5 to about 10 microns.
Claim 15
Dependent Claim
34 words
The method of claim 9 comprising continuously applying the polyarylsiloxane release material to the surface of the fuser member to maintain thereon the second release portion of the fluid and the first barrier portion.
Claim 16
Dependent Claim
28 words
The method of claim 9 wherein polyarylsiloxane release material has at least about 0.5 aryl groups, substituted aryl groups or a combination of said groups per siloxane molecule.
Claim 17
Dependent Claim
39 words
The method of claim 9 wherein the polyarylsiloxane release material comprises polyarylmethyl dimethylsiloxane having from about 0.5 methyl group per single polymer chain or from about 1.0 group per two polymer chains substituted by aryl or aryl substituted groups.
Claim 18
Dependent Claim
13 words
The method of claim 9 wherein the polyarylsiloxane release material is polyphenylmethyl dimethylsiloxane.
Claim 19
Dependent Claim
13 words
The method of claim 9 wherein the polyarylsiloxane release material is polychlorophenylmethyl dimethylsiloxane.
Claim 20
Dependent Claim
13 words
The method of claim 9 wherein the polyarylsiloxane release material is polybromophenyl dimethylsiloxane.
Claim 21
Dependent Claim
13 words
The method of claim 9 wherein the polyarylsiloxane release material is polyiodophenyl dimethylsiloxane.
Claim 22
Dependent Claim
13 words
The method of claim 9 wherein the polyarylsiloxane release material is polyiodonaphthyl dimethylsiloxane.
References Cited (Backward Citations)
US3937637A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-12-26 | 1981-06-27 | 1981-12-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-12-26 | 1985-06-27 | 1985-12-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-12-26 | 1989-06-27 | 1989-12-27 | $7700.00 | Window Closed / Lapsed |