US5035950A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluoroelastomer coated fuser roll
Assignee: Ames Rubber Corp
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Filing: 1990-02-09
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Granted: 1991-07-30
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Expires: 2010-02-09
Abstract
Abstract A fuser member for applying heat and pressure to fuse toner to a recording medium which does not require use of mercapto functional release agents has a surface of a fluoroelastomer material including vinylidene fluoride and at least about 23.4 mole percent hexafluoropropylene. High hexafluoropropylene molar content at least as high as about 30.0 mole percent and preferably 38.1 mole percent may be utilized. When the fluoroelastomer material is a copolymer of vinylidene fluoride and hexafluoropropylene, the fluorine content is between about 69-71%. Such fuser members may be utilized alone or with polysiloxane release agents which do not include mercapto functional compounds.
Inventors
- 👤 Chris Del Rosario
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 17:44
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/20; G03G15/2003; G03G15/2014; G03G15/2053; G03G15/2057; Y; Y10; Y10S; Y10S428/00; Y10S428/906; Y10T; Y10T428/00; Y10T428/31504; Y10T428/3154; Y10T428/31652; Y10T428/31663; Y10T428/31678
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
38 words
A fuser member to fix toner particles on a recording medium, comprising: a substrate; and a top coat on the substrate, the top coat of a fluoroelastomer including vinylidene fluoride and at least about 23.4 mole percent hexafluoropropylene.
Claim 2
Dependent Claim
38 words
A fuser member to fix toner particles on a recording medium, comprising: a substrate; and a top coat on the substrate, the top coat of a fluoroelastomer including vinylidene fluoride and at least about 23.4 mole percent hexafluoropropylene.
Claim 3
Dependent Claim
17 words
The fuser member of claim 1, wherein the fluoroelastomer includes at least about 30.0 mole percent hexafluoropropylene.
Claim 4
Dependent Claim
17 words
The fuser member of claim 1, wherein the fluoroelastomer includes at least about 38.1 mole percent hexafluoropropylene.
Claim 5
Dependent Claim
17 words
The fuser member of claim 1, wherein the fluoroelastomer is a copolymer of hexafluoropropylene and vinylidene fluoride.
Claim 6
Dependent Claim
19 words
The fuser member of claim 4, wherein the weight ratio of vinylidene fluoride to hexafluoropropylene is less than 1.0.
Claim 7
Dependent Claim
15 words
The fuser member of claim 4, wherein the ratio is between about 0.70 and 0.80.
Claim 8
Dependent Claim
27 words
The fuser member of claim 1, wherein the fuser member is in the form of a roll and the fluoroelastomer is the outer covering of the roll.
Claim 9
Dependent Claim
29 words
The fuser member of claim 7, wherein the substrate is in the form of a metal core having a layer of silicone material including metal oxide filler, disposed thereon.
Claim 10
Dependent Claim
21 words
The fuser member of claim 8, and including a tie coat of fluoroelastomer disposed between the top coat and the substrate.
Claim 11
Dependent Claim
16 words
The fuser member of claim 1, wherein the fluoroelastomer is cured by a nucleophic addition cure.
Claim 12
Dependent Claim
22 words
The fuser member of claim 10, wherein the nucleophilic addition cure utilized MgO as an acceptor and Ca (OH) 2 as activator.
Claim 13
Dependent Claim
38 words
The fuser member of claim 11, wherein MgO is included in an amount between about 2 to 4 parts and Ca(OH) 2 in an amount between about 4 to 8 parts, per 100 parts by weight of elastomer.
Claim 14
Dependent Claim
21 words
The fuser member of claim 11, wherein the fluoroelastomer includes less than about 10 parts metal oxide per 100 parts elastomer.
Claim 15
Dependent Claim
53 words
A fuser system for fusing toner to a recording medium, comprising: a substrate; a top coat formed of a fluoroelastomer material disposed on the substrate, the fluoroelastomer material including vinylidene fluoride and at least about 23.4 mole percent hexafluoropropylene; and a polysiloxane release agent fluid disposed on the surface of the top coat.
Claim 16
Dependent Claim
53 words
A fuser system for fusing toner to a recording medium, comprising: a substrate; a top coat formed of a fluoroelastomer material disposed on the substrate, the fluoroelastomer material including vinylidene fluoride and at least about 23.4 mole percent hexafluoropropylene; and a polysiloxane release agent fluid disposed on the surface of the top coat.
Claim 17
Dependent Claim
18 words
The fuser system of claim 14, wherein the release agent fluid is substantially free of mercapto functional compounds.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1994-07-29 | 1995-01-28 | 1995-07-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-07-29 | 1999-01-28 | 1999-07-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-07-29 | 2003-01-28 | 2003-07-30 | $7700.00 | Window Closed / Lapsed |