US5099560A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Elastic fixing roller
Assignee: Sumitomo Electric Industries Ltd
•
Filing: 1991-01-28
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Granted: 1992-03-31
•
Expires: 2011-01-28
Abstract
Abstract A fixing roller for use in the fixing stage of a fixing apparatus such as a copying machine provided with multiple rubber and/or fabric layers of certain thicknesses and hardnesses surrounding a core member to improve the copying characteristics of the roller.
Inventors
- 👤 Chiaki Kato
- 👤 Masaya Nishi
- 👤 Toshiyuki Hatta
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 22:12
CPC Classifications
B; B29; B29C; B29C70/00; B29C70/04; B29C70/28; B29D; B29D99/00; B29D99/0032; B29D99/0035; F; F16; F16C; F16C13/00; G; G03; G03G; G03G15/00; G03G15/20; G03G15/2003; G03G15/2014; G03G15/2053; G03G15/2057; B29L; B29L2031/00; B29L2031/32; B29L2031/324
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
81 words
A fixing roller for use in a fixing stage of a fixing apparatus comprising: a roller core; a first heat-resistant rubber layer provided on an outer surface of said roller core; a second heat-resistant rubber layer provided on an outer surface of said first heat-resistant rubber layer, said second heat-resistant rubber layer being reinforced at its outer surface by a heat-resistant porous material; and a thin third heat-resistant rubber layer provided on the outer surface of said second heat-resistant rubber layer.
Claim 2
Dependent Claim
81 words
A fixing roller for use in a fixing stage of a fixing apparatus comprising: a roller core; a first heat-resistant rubber layer provided on an outer surface of said roller core; a second heat-resistant rubber layer provided on an outer surface of said first heat-resistant rubber layer, said second heat-resistant rubber layer being reinforced at its outer surface by a heat-resistant porous material; and a thin third heat-resistant rubber layer provided on the outer surface of said second heat-resistant rubber layer.
Claim 3
Dependent Claim
23 words
A fixing roller as set forth in claim 1, wherein said first heat-resistant rubber layer is thicker than said second heat-resistant rubber layer.
Claim 4
Dependent Claim
22 words
A fixing roller as set forth in claim 1, wherein said third heat-resistant rubber layer is no more than 0.2 mm thick.
Claim 5
Dependent Claim
27 words
A fixing roller as set forth in claim 1, wherein said heat-resistant porous material is a porous tube of ethylene tetrafluoride resin having a porosity of 60-90%.
Claim 6
Dependent Claim
24 words
A fixing roller as set forth in claim 1, wherein said roller as a whole has a Shore hardness of 60 degrees or less.
Claim 7
Dependent Claim
28 words
A fixing roller as set forth in claim 1, wherein said heat-resistant porous material is impregnated with liquid silicone rubber having a viscosity of 50,000 c.s. or less.
Claim 8
Dependent Claim
25 words
A fixing roller as set forth in claim 1, wherein a filler is added to the rubber to raise its heat resistance and electrical conductivity.
Claim 9
Dependent Claim
23 words
A fixing roller as set forth in claim 1, wherein a silicon oil is added to the rubber to raise its releasing properties.
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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) | 1995-03-31 | 1995-09-30 | 1996-03-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-03-31 | 1999-09-30 | 2000-03-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-03-31 | 2003-09-30 | 2004-03-31 | $7700.00 | Window Closed / Lapsed |