US5678153A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fixing apparatus comprising a cleaning roller having a coated layer of polyimide and polytetrafluoroethylene
Assignee: Ricoh Co Ltd
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Filing: 1995-12-01
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Granted: 1997-10-14
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Expires: 2015-12-01
Abstract
Abstract A fixing apparatus includes a fixing roller for fixing a toner on a transferring material and a pressing roller for coming into contact with and pressing against a fixing roller. The apparatus further includes a cleaning roller which comes into contact with and cleans the fixing roller as well as a blade which scratches off toner and foreign particles transferred to the cleaning roller from the fixing roller. In the apparatus of the present invention, a coated layer including polyimide and polytetrafluorethylene is disposed on the surface of the cleaning roller.
Inventors
- 👤 Jun Okamoto
- 👤 Setsuo Soga
- 👤 Toshiya Yabei
- 👤 Yasuhiro Kohira
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 13:19
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/20; G03G15/2003; G03G15/2014; G03G15/2017; G03G15/2025
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
79 words
A fixing apparatus comprising: a fixing roller for fixing a toner image on a transferring material; a pressing roller for coming into contact with and pressing against said fixing roller; a cleaning roller for coming into contact with and cleaning said fixing roller; and a blade for scratching off toner and foreign particles transferred to said cleaning roller from said fixing roller; wherein a coated layer including polyimide and polytetrafluorethylene is disposed on a surface of said cleaning roller.
Claim 2
Dependent Claim
79 words
A fixing apparatus comprising: a fixing roller for fixing a toner image on a transferring material; a pressing roller for coming into contact with and pressing against said fixing roller; a cleaning roller for coming into contact with and cleaning said fixing roller; and a blade for scratching off toner and foreign particles transferred to said cleaning roller from said fixing roller; wherein a coated layer including polyimide and polytetrafluorethylene is disposed on a surface of said cleaning roller.
Claim 3
Dependent Claim
30 words
A fixing apparatus according to claim 1, wherein said coated layer of said cleaning roller has a pencil hardness based on, JIS Japanese Industrial Standard, of 5H scale or more.
Claim 4
Dependent Claim
24 words
A fixing apparatus according to claim 1, wherein said coated layer of said cleaning roller has a surface roughness of 0.6 μm or less.
Claim 5
Dependent Claim
18 words
A fixing apparatus according to claim 1, wherein said cleaning roller comprises a metallic core made of aluminum.
Claim 6
Dependent Claim
37 words
A fixing apparatus according to claim 1, wherein a free edge of said blade contacts said cleaning roller on a line which extends between a center of the fixing roller and a center of the cleaning roller.
References Cited (Backward Citations)
US3861860A
Cited
JPS5753774A
Cited
JPS5786873A
Cited
US4530596A
Cited
JPS6022171A
Cited
US4739370A
Cited
JPH05142964A
Cited
JPH06342247A
Cited
JPH07302012A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2000-10-13 | 2001-04-14 | 2001-10-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2004-10-13 | 2005-04-14 | 2005-10-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2008-10-13 | 2009-04-14 | 2009-10-14 | $7700.00 | Window Closed / Lapsed |