Patent US5287153A successfully refreshed from Google Patents.
US5287153A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fixing apparatus with biasing means to prevent offset
Assignee: Canon Inc
•
Filing: 1990-11-27
•
Granted: 1994-02-15
•
Expires: 2010-11-27
Abstract
Abstract A fixing device includes a feed member for performing a fixing operation by grasping and feeding a supporting material supporting an undeveloped toner image. The feed member is made of a conductive base material and a surface release layer provided thereon, the surface release layer containing a conductive material. A biasing voltage is applied to the conductive base material.
Inventors
- 👤 Hisaaki Senba
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 05:54
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/20; G03G15/2003; G03G15/2014; G03G15/2053; G03G15/2057; G03G15/2064
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
124 words
A fixing device comprising: a fixing feed member comprising an electrically conductive layer and a releasing surface layer on the electrically conductive layer, said fixing feed member contactable to an unfixed toner image on a supporting material, and said releasing surface layer having a volume resistivity of from 10 6 to 10 13 Ωcm; a back up member; said fixing feed member and said back up member being arranged for grasping and feeding the supporting material supporting said unfixed toner image and for fixing said unfixed toner image; and a facilitating means for facilitating a transfer of electric charges, having a polarity opposite to the polarity of said unfixed toner image, from the surface of said releasing surface layer to said electrically conductive layer.
Claim 2
Dependent Claim
124 words
A fixing device comprising: a fixing feed member comprising an electrically conductive layer and a releasing surface layer on the electrically conductive layer, said fixing feed member contactable to an unfixed toner image on a supporting material, and said releasing surface layer having a volume resistivity of from 10 6 to 10 13 Ωcm; a back up member; said fixing feed member and said back up member being arranged for grasping and feeding the supporting material supporting said unfixed toner image and for fixing said unfixed toner image; and a facilitating means for facilitating a transfer of electric charges, having a polarity opposite to the polarity of said unfixed toner image, from the surface of said releasing surface layer to said electrically conductive layer.
Claim 3
Dependent Claim
23 words
A fixing device according to claim 1, wherein said releasing surface layer is comprised of a releasing material and an electrically conductive material.
Claim 4
Dependent Claim
17 words
A fixing device according to claim 1, further comprising a heater for heating said fixing feed member.
Claim 5
Dependent Claim
38 words
A fixing device according to claim 1, wherein said facilitating means comprises bias voltage applying means for applying a bias voltage having a polarity identical to the polarity of said unfixed toner image to said electrically conductive layer.
Claim 6
Dependent Claim
18 words
A fixing device according to claim 4, wherein said bias voltage applying means comprises a bias power supply.
Claim 7
Dependent Claim
16 words
A fixing device according to claim 4, wherein said bias voltage is more than 500 V.
References Cited (Backward Citations)
US4470688A
Cited
US4466732A
Cited
US4842944A
Cited
US4862215A
Cited
US4819020A
Cited
US5045891A
Cited
JPS63289572A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1997-02-14 | 1997-08-16 | 1998-02-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-02-14 | 2001-08-16 | 2002-02-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-02-14 | 2005-08-16 | 2006-02-15 | $7700.00 | Window Closed / Lapsed |