US4844953A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Elastic roller for fixing and method of producing the same
Assignee: Sumitomo Electric Industries Ltd
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Filing: 1988-05-16
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Granted: 1989-07-04
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Expires: 2008-05-16
Abstract
Abstract The invention provides an elastic roller for use in an apparatus for fixing a toner image, electrostatically formed on copy paper by passing the toner image between two rollers, comprising a roller core, a fusible fluororesin layer coated on the outside of the roller core, a porous fluororesin having porous portions affixed to the roller core through the fusible fluororesin layer, and a rubber impregnated into the porous portions of the porous fluororesin. It also provides a method for making an elastic roller including the steps of fusing a fusible fluororesin layer on the outside of a roller core or base; affixing a porous fluororesin having porous portions to the roller core through the fused fluororesin layer; filling the porous portions of the porous fluororesin with a rubber after fusing the porous fluororesin to the roller core; and hardening the rubber.
Inventors
- 👤 Chiaki Kato
- 👤 Toshiyuki Hatta
- 👤 Akihiko Isomura
- 👤 Shinichi Toyooka
- 👤 Masaya Nishi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 04:12
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/20; G03G15/2003; G03G15/2014; G03G15/2053; G03G15/2057; Y; Y10; Y10T; Y10T428/00; Y10T428/13; Y10T428/1352; Y10T428/1386
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
57 words
An elastic roller for use in an apparatus for fixing a electrostatically formed toner image comprising: a roller core, a fusible fluororesin layer coated on the roller core, a porous fluororesin having porous portions affixed to the roller core through the fusible fluororesin layer, and a hardened rubber impregnated into the porous portions of the porous fluororesin.
Claim 2
Dependent Claim
57 words
An elastic roller for use in an apparatus for fixing a electrostatically formed toner image comprising: a roller core, a fusible fluororesin layer coated on the roller core, a porous fluororesin having porous portions affixed to the roller core through the fusible fluororesin layer, and a hardened rubber impregnated into the porous portions of the porous fluororesin.
Claim 3
Dependent Claim
18 words
The elastic roller according to claim 1, in which the fusible fluororesin layer comprises a perfluoroalkoxy (P.F.A.) resin.
Claim 4
Dependent Claim
17 words
The elastic roller according to claim 1, in which the porous fluororesin comprises a (poly-)tetrafluoroethylene (P.T.F.E.) resin.
Claim 5
Dependent Claim
23 words
The elastic roller according to claim 1, in which the rubber filling the porous portions of the porous fluororesin is a silicone rubber.
Claim 6
Dependent Claim
22 words
The elastic roller according to claim 1, in which the rubber filling the porous portions of the porous fluororesin is a fluororubber.
Claim 7
Dependent Claim
58 words
An elastic roller for use in an apparatus for fixing a electrostatically formed toner image comprising: a roller core, a layer of perfluoroalkoxy resin fused to the roller core, a layer of porous (poly-)tetrafluoroethylene resin affixed to the roller core through the perfluoroalkoxy resin layer, and a hardened rubber impregnated into the porous portions of the porous (poly-)tetrafluoroethylene.
Claim 8
Dependent Claim
58 words
An elastic roller for use in an apparatus for fixing a electrostatically formed toner image comprising: a roller core, a layer of perfluoroalkoxy resin fused to the roller core, a layer of porous (poly-)tetrafluoroethylene resin affixed to the roller core through the perfluoroalkoxy resin layer, and a hardened rubber impregnated into the porous portions of the porous (poly-)tetrafluoroethylene.
Claim 9
Dependent Claim
13 words
The elastic roller of claim 6 wherein the rubber is a silicone rubber.
Claim 10
Dependent Claim
12 words
The elastic roller of claim 6 wherein the rubber is a fluororubber.
Claim 11
Independent Claim
93 words
A method of producing an elastic roller for use in a fixing apparatus for fixing a toner image electrostatically formed on copy paper by passing the tone image between two rollers comprising the steps of: forming a fusible fluororesin layer on the outside of a roller core; coating the fusible fluororesin layer with a porous fluororesin having porous portions; affixing the porous fluororesin to the roller core through the fluororesin by heating; impregnating the porous portions with a rubber after affixing the porous fluororesin; and hardening the rubber after filling the porous portions.
Claim 12
Independent Claim
93 words
A method of producing an elastic roller for use in a fixing apparatus for fixing a toner image electrostatically formed on copy paper by passing the tone image between two rollers comprising the steps of: forming a fusible fluororesin layer on the outside of a roller core; coating the fusible fluororesin layer with a porous fluororesin having porous portions; affixing the porous fluororesin to the roller core through the fluororesin by heating; impregnating the porous portions with a rubber after affixing the porous fluororesin; and hardening the rubber after filling the porous portions.
Claim 13
Dependent Claim
73 words
The method according to claim 9, wherein the coating step comprises coating the fusible fluororesin layer with a (poly-)tetrafluoroethylene resin and wherein the affixing step comprises the steps of: covering the roller core fused with the fusible fluororesin layer with an unsintered drawn-tube of the porous fluororesin; and simultaneously heating the drawn-tube at a temperature not lower than the melting temperature of the (poly-)tetrafluoroethylene resin and affixing the drawn-tube onto the roller core.
Claim 14
Dependent Claim
22 words
The method according to claim 9, wherein the forming step comprises forming a fusible perfluoroalkoxy (P.F.A.) resin layer on the roller core.
Claim 15
Dependent Claim
23 words
The method according to claim 9, wherein the impregnating step comprises impregnating the porous portions of the porous fluororesin with a silicone rubber.
Claim 16
Dependent Claim
22 words
The method according to claim 9, wherein the impregnating step comprise impregnating the porous portions of the porous fluororesin with a fluororubber.
Claim 17
Dependent Claim
23 words
The method according to claim 11, wherein the impregnating step comprises impregnating the porous portions of the porous fluororesin with a silicone rubber.
Claim 18
Dependent Claim
22 words
The method according to claim 11, wherein the impregnating step comprise impregnating the porous portions of the porous fluororesin with a fluororubber.
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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) | 1992-07-03 | 1993-01-02 | 1993-07-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-07-03 | 1997-01-02 | 1997-07-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-07-03 | 2001-01-02 | 2001-07-04 | $7700.00 | Window Closed / Lapsed |