Patent US6438348B2 successfully refreshed from Google Patents.
US6438348B2
Expired / Lapsed
US
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Fixing apparatus with first and second heating rotation members having a potential difference
Assignee: Canon Inc
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Filing: 2001-01-22
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Granted: 2002-08-20
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Expires: 2021-01-22
Abstract
Abstract A fixing apparatus has a first rotating member, a first heating device for heating the first rotating member, a second rotating member forming a nip together with the first rotating member, and a second heating device for heating the second rotating member wherein a recording material bearing an unfixed image thereon is nipped and conveyed at the nip in such a manner that the unfixed image is in contact with the first rotating member and is fixed by heating on the recording material. A voltage applying device applies voltage to create potential difference between the first rotating member and the second rotating member, and the second rotating member has a conductive parting layer with a surface resistance of 10 6 Ω or less on a surface thereof.
Inventors
- 👤 Yasunari Kobaru
- 👤 Takayasu Yuminamochi
- 👤 Hiroshi Kataoka
- 👤 Takashi Narahara
- 👤 Tomoyuki Makihira
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 04:36
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/20; G03G15/2003; G03G15/2014; G03G15/2064
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
139 words
A fixing apparatus, comprising a first rotating member; first heating means for heating said first rotating member; a second rotating member for forming a nip together with said first rotating member; wherein a recording material bearing an unfixed image thereon is nipped and conveyed at said nip in such a manner that the unfixed image is in contact with said first rotating member, and the unfixed image is fixed by heating on the recording material, voltage applying means for applying voltage to create potential difference between said first rotating member and said second rotating member; and second heating means for heating said second rotating member, wherein said second rotating member has a conductive parting layer on a surface thereof, and wherein said conductive parting layer of said rotating member has a surface resistance of 10 6 Ω or less.
Claim 2
Dependent Claim
139 words
A fixing apparatus, comprising a first rotating member; first heating means for heating said first rotating member; a second rotating member for forming a nip together with said first rotating member; wherein a recording material bearing an unfixed image thereon is nipped and conveyed at said nip in such a manner that the unfixed image is in contact with said first rotating member, and the unfixed image is fixed by heating on the recording material, voltage applying means for applying voltage to create potential difference between said first rotating member and said second rotating member; and second heating means for heating said second rotating member, wherein said second rotating member has a conductive parting layer on a surface thereof, and wherein said conductive parting layer of said rotating member has a surface resistance of 10 6 Ω or less.
Claim 3
Dependent Claim
24 words
A fixing apparatus according to claim 1 , wherein said voltage applying means applies a voltage to the surface of said second rotating member.
Claim 4
Dependent Claim
26 words
A fixing apparatus according to claim 1 , wherein said conductive parting layer of said second rotating member is a fluororesin layer containing a conductive agent.
Claim 5
Dependent Claim
22 words
A fixing apparatus according to claim 1 , wherein said second rotating member has an elastic layer inside said conductive parting layer.
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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) | 2005-08-19 | 2006-02-18 | 2006-08-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2009-08-19 | 2010-02-18 | 2010-08-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2013-08-19 | 2014-02-18 | 2014-08-20 | $7700.00 | Window Closed / Lapsed |