US5420679A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Elastic roller and fixing apparatus using same
Assignee: Canon Inc
•
Filing: 1993-04-19
•
Granted: 1995-05-30
•
Expires: 2013-04-19
Abstract
Abstract An elastic roller includes a conductive base; an elastic layer on the conductive base; a surface parting layer on the elastic layer, the surface parting layer having a surface resistance of not less than 10 10 ohm; wherein the elastic layer has a volume resistivity of not more than 10 7 ohm.cm.
Inventors
- 👤 Masahiro Goto
- 👤 Yasushi Sato
- 👤 Shunji Nakamura
- 👤 Junji Araya
- 👤 Tetsuo Saito
- 👤 Kazuo Kishino
- 👤 Kouichi Okuda
- 👤 Yohji Tomoyuki
- 👤 Akira Hayakawa
- 👤 Fumitaka Aoki
- 👤 Hirokazu Ikenoue
- 👤 Kenji Nagata
- 👤 Toshihiko Yamanaka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 12:49
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/20; G03G15/2003; G03G15/2014; G03G15/2064; G03G15/206
Claims Analysis
Total Claims: 52
Claim 1
Independent Claim
72 words
A pressing roller for fixing an image, comprising: an electrically conductive base; a rubber layer on said base; and a surface fluorine resin layer on said rubber layer, wherein said rubber layer has a volume resistivity of not more than 10 7 ohm.cm and said surface fluorine resin layer has a surface resistance of not less than 10 10 ohm, wherein a thickness of said surface fluorine resin layer is 10-100 microns.
Claim 2
Dependent Claim
72 words
A pressing roller for fixing an image, comprising: an electrically conductive base; a rubber layer on said base; and a surface fluorine resin layer on said rubber layer, wherein said rubber layer has a volume resistivity of not more than 10 7 ohm.cm and said surface fluorine resin layer has a surface resistance of not less than 10 10 ohm, wherein a thickness of said surface fluorine resin layer is 10-100 microns.
Claim 3
Dependent Claim
14 words
A roller according to claim 1, wherein said rubber elastic layer contains conductive material.
Claim 4
Dependent Claim
17 words
A roller according to claim 2, wherein the conductive material is carbon black, metal or metal oxide.
Claim 5
Dependent Claim
25 words
A roller according to claim 1, wherein said rubber layer is of silicone rubber, and said surface fluorine resin layer is of fluorine resin tube.
Claim 6
Dependent Claim
14 words
A roller according to claim 4, wherein said fluorine resin is PFA or FEP.
Claim 7
Dependent Claim
16 words
A roller according to claim 1, wherein said elastic layer has a thickness of 2-10 mm.
Claim 8
Dependent Claim
17 words
A roller according to claim 1, wherein said rubber layer has a JIS-A hardness of 10-40 degrees.
Claim 9
Dependent Claim
24 words
A roller according to claim 1, further comprising a primer layer between said rubber layer and said surface fluorine resin layer for bonding them.
Claim 10
Dependent Claim
20 words
A roller according to claim 8, wherein said primer layer is of a mixture of fluorine rubber and fluorine resin.
Claim 11
Dependent Claim
23 words
A roller according to claim 8, wherein said primer layer has a JIS-A hardness of 40-80 degrees, and a thickness of 10-50 microns.
Claim 12
Dependent Claim
106 words
An image fixing apparatus, comprising: first and second rollers press-contacted to each other, said rollers forming a nip therebetween through which a recording material having an unfixed image is passed to fix the image on the recording material; said first roller including an electrically conductive base; a rubber layer on said base; and a surface fluorine resin layer on said rubber layer, wherein said rubber layer has a volume resistivity of not more than 10 7 ohm.cm and said surface fluorine resin layer has a surface resistance of not less than 10 10 ohm, wherein a thickness of said surface fluorine resin layer is 10-100 microns.
Claim 13
Dependent Claim
106 words
An image fixing apparatus, comprising: first and second rollers press-contacted to each other, said rollers forming a nip therebetween through which a recording material having an unfixed image is passed to fix the image on the recording material; said first roller including an electrically conductive base; a rubber layer on said base; and a surface fluorine resin layer on said rubber layer, wherein said rubber layer has a volume resistivity of not more than 10 7 ohm.cm and said surface fluorine resin layer has a surface resistance of not less than 10 10 ohm, wherein a thickness of said surface fluorine resin layer is 10-100 microns.
Claim 14
Dependent Claim
13 words
An apparatus according to claim 11, wherein said rubber layer contains conductive material.
Claim 15
Dependent Claim
17 words
An apparatus according to claim 12, wherein the conductive material is carbon black, metal or metal oxide.
Claim 16
Dependent Claim
24 words
An apparatus according to claim 11, wherein said elastic layer is of silicone rubber, and said surface parting layer is of fluorine resin tube.
Claim 17
Dependent Claim
14 words
An apparatus according to claim 14, wherein said fluorine resin is PFA or FEP.
Claim 18
Dependent Claim
16 words
An apparatus according to claim 11, wherein said rubber layer has a thickness of 2-10 mm.
Claim 19
Dependent Claim
17 words
An apparatus according to claim 11, wherein said elastic layer has a JIS-A hardness of 10-40 degrees.
Claim 20
Dependent Claim
24 words
An apparatus according to claim 11, further comprising a primer layer between said rubber layer and said surface fluorine resin layer for bonding them.
Claim 21
Dependent Claim
20 words
An apparatus according to claim 18, wherein said primer layer is of a mixture of fluorine rubber and fluorine resin.
Claim 22
Dependent Claim
23 words
An apparatus according to claim 18, wherein said primer layer has a JIS-A hardness of 40-80 degrees, and a thickness of 10-50 microns.
Claim 23
Dependent Claim
12 words
An apparatus according to claim 11, wherein said conductive base is grounded.
Claim 24
Dependent Claim
21 words
An apparatus according to claim 11, wherein said second roller comprises a conductive base which is grounded through a self-bias element.
Claim 25
Dependent Claim
60 words
A pressing roller for fixing an image, comprising: an electrically conductive base; a silicone rubber layer on said base, said silicone rubber layer containing electrically conductive material; and a surface parting layer on said silicone rubber layer, wherein said silicone rubber layer has a volume resistivity of not more than 10 7 ohm.cm and is of addition reaction silicone rubber.
Claim 26
Dependent Claim
60 words
A pressing roller for fixing an image, comprising: an electrically conductive base; a silicone rubber layer on said base, said silicone rubber layer containing electrically conductive material; and a surface parting layer on said silicone rubber layer, wherein said silicone rubber layer has a volume resistivity of not more than 10 7 ohm.cm and is of addition reaction silicone rubber.
Claim 27
Dependent Claim
15 words
A roller according to claim 23, wherein said surface layer is of fluorine resin tube.
Claim 28
Dependent Claim
16 words
A roller according to claim 23, wherein said surface layer has a thickness of 10-100 microns.
Claim 29
Dependent Claim
14 words
A roller according to claim 23, wherein said rubber layer contains conductive carbon black.
Claim 30
Dependent Claim
20 words
A roller according to claim 23, wherein said rubber layer has a JIS-A hardness of not more than 40 degrees.
Claim 31
Dependent Claim
17 words
A roller according to claim 26, wherein content of said conductive carbon black is 1-50% by weight.
Claim 32
Dependent Claim
20 words
A roller according to claim 23, wherein said surface layer is of a mixture of fluorine resin and fluorine rubber.
Claim 33
Dependent Claim
95 words
An image fixing apparatus, comprising: first and second rollers press-contacted to each other, said rollers forming a nip therebetween through which a recording material having an unfixed image is passed to fix the unfixed image on the recording material; said first roller including; an electrically conductive base; an silicone rubber layer on said conductive base, said silicone rubber layer containing electrically conductive material; and a surface parting layer on said rubber layer, wherein said silicone rubber layer has a volume resistivity of not more than 10 7 ohm.cm and is of addition reaction silicone rubber.
Claim 34
Dependent Claim
95 words
An image fixing apparatus, comprising: first and second rollers press-contacted to each other, said rollers forming a nip therebetween through which a recording material having an unfixed image is passed to fix the unfixed image on the recording material; said first roller including; an electrically conductive base; an silicone rubber layer on said conductive base, said silicone rubber layer containing electrically conductive material; and a surface parting layer on said rubber layer, wherein said silicone rubber layer has a volume resistivity of not more than 10 7 ohm.cm and is of addition reaction silicone rubber.
Claim 35
Dependent Claim
21 words
An apparatus according to claim 30, wherein said rubber layer has a volume resistivity of not more than 10 7 ohm.cm.
Claim 36
Dependent Claim
15 words
An apparatus according to claim 30, wherein said surface layer is of fluorine resin tube.
Claim 37
Dependent Claim
16 words
An apparatus according to claim 30, wherein said surface layer has a thickness of 10-100 microns.
Claim 38
Dependent Claim
14 words
An apparatus according to claim 30, wherein said rubber layer contains conductive carbon black.
Claim 39
Dependent Claim
20 words
An apparatus according to claim 30, wherein said rubber layer has a JIS-A hardness of not more than 40 degrees.
Claim 40
Dependent Claim
17 words
An apparatus according to claim 34, wherein content of said conductive carbon black is 1-50% by weight.
Claim 41
Dependent Claim
20 words
An apparatus according to claim 30, wherein said surface layer is of a mixture of fluorine resin and fluorine rubber.
Claim 42
Dependent Claim
23 words
An apparatus according to claim 30, wherein said second roller is heated by a heating source and is contactable to the unfixed image.
Claim 43
Dependent Claim
99 words
An image fixing apparatus, comprising: first and second rollers press-contacted to each other, said rollers forming a nip therebetween through which a recording material carrying an unfixed image is passed to fix the unfixed image on the recording material; said first roller including: an electrically conductive base; a rubber layer on said base, said rubber layer having a volume resistivity of not more than 10 7 ohm.cm; a surface parting layer on said rubber layer, said surface parting layer having a surface resistance of not less than 10 10 ohm; and connecting means for electrically grounding said rubber layer.
Claim 44
Dependent Claim
99 words
An image fixing apparatus, comprising: first and second rollers press-contacted to each other, said rollers forming a nip therebetween through which a recording material carrying an unfixed image is passed to fix the unfixed image on the recording material; said first roller including: an electrically conductive base; a rubber layer on said base, said rubber layer having a volume resistivity of not more than 10 7 ohm.cm; a surface parting layer on said rubber layer, said surface parting layer having a surface resistance of not less than 10 10 ohm; and connecting means for electrically grounding said rubber layer.
Claim 45
Dependent Claim
21 words
An apparatus according to claim 31, wherein said elastic layer has a volume resistivity of not more than 10 7 ohm.cm.
Claim 46
Dependent Claim
20 words
An apparatus according to claim 39, wherein said connecting means includes one of a voltage source and a self-bias element.
Claim 47
Dependent Claim
13 words
An apparatus according to claim 39, wherein said rubber layer contains conductive material.
Claim 48
Dependent Claim
16 words
An apparatus according to claim 39, wherein said surface parting layer is of fluorine resin tube.
Claim 49
Dependent Claim
16 words
An apparatus according to claim 39, wherein said surface layer has a thickness of 30-50 microns.
Claim 50
Dependent Claim
14 words
An apparatus according to claim 39, wherein said rubber layer is of silicone rubber.
Claim 51
Dependent Claim
38 words
An apparatus according to claim 39, wherein said second roller is contactable to the unfixed image and said connecting means has a voltage applying means of a polarity which is opposite from a polarity of the unfixed image.
Claim 52
Dependent Claim
24 words
An apparatus according to claim 39, wherein said second roller is heated by a heating source and is contactable to the unfixed toner image.
References Cited (Backward Citations)
US3809854A
Cited
US3978268A
Cited
US4179601A
Cited
US4320714A
Cited
US4568275A
Cited
JPS5931984A
Cited
JPS5990874A
Cited
JPS6019178A
Cited
JPS6063575A
Cited
JPS6138957A
Cited
US4674860A
Cited
US4842944A
Cited
US4883715A
Cited
US4804576A
Cited
JPS61250668A
Cited
US4910559A
Cited
JPS6234181A
Cited
US4711818A
Cited
US4819020A
Cited
EP0320533A1
Cited
JPS63192070A
Cited
US5045891A
Cited
EP0277651A2
Cited
US4994319A
Cited
US4949130A
Cited
US5153660A
Cited
US5099560A
Cited
JPH01227179A
Cited
JPS63289572A
Cited
US5082596A
Cited
EP0372518A2
Cited
JPH02226287A
Cited
US5068692A
Cited
US5099285A
Cited
EP0424053A2
Cited
EP0441351A2
Cited
US5208638A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1998-05-29 | 1998-11-28 | 1999-05-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2002-05-29 | 2002-11-28 | 2003-05-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2006-05-29 | 2006-11-28 | 2007-05-30 | $7700.00 | Window Closed / Lapsed |