US5045891A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Image fixing device and roller therefor having a low resistance surface layer
Assignee: Canon Inc
•
Filing: 1988-02-03
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Granted: 1991-09-03
•
Expires: 2008-02-03
Abstract
Abstract An image fixing apparatus in which a recording material having an unfixed image through a nip formed between rotatable rollers. At least one of the rollers is provided with a surface layer containing straight-needle like single-crytal fibers.
Inventors
- 👤 Hisaaki Senba
- 👤 Michio Shigenobu
- 👤 Toshiyuki Hatta
- 👤 Masaya Nishi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 16:11
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/20; G03G15/2003; G03G15/2014; G03G15/2053; G03G15/2057; G03G15/206; Y; Y10; Y10S; Y10S428/00; Y10S428/909; Y10T; Y10T428/00; Y10T428/30
Claims Analysis
Total Claims: 49
Claim 1
Independent Claim
42 words
A roller for fixing a toner image on a recording material, comprising: a base member; and a surface layer outside said base member, said surface layer containing low resistance fibers which are single-crystal fibers, wherein the fibers have lengths of 5-30 microns.
Claim 2
Dependent Claim
42 words
A roller for fixing a toner image on a recording material, comprising: a base member; and a surface layer outside said base member, said surface layer containing low resistance fibers which are single-crystal fibers, wherein the fibers have lengths of 5-30 microns.
Claim 3
Dependent Claim
53 words
A roller for fixing a toner image on a recording material, comprising: a base member; and a surface layer outside said base member, said surface layer containing low resistance fibers which are single-crystal fibers, wherein a content of the fibers is 2-20% by weight with respect to base material of the surface layer.
Claim 4
Dependent Claim
53 words
A roller for fixing a toner image on a recording material, comprising: a base member; and a surface layer outside said base member, said surface layer containing low resistance fibers which are single-crystal fibers, wherein a content of the fibers is 2-20% by weight with respect to base material of the surface layer.
Claim 5
Dependent Claim
45 words
A roller for fixing a toner image on a recording material, comprising: a base member; and a surface layer outside said base member, said surface layer containing low resistance fibers which are single-crystal fibers, wherein said surface layer has a base material of fluorine resin.
Claim 6
Dependent Claim
45 words
A roller for fixing a toner image on a recording material, comprising: a base member; and a surface layer outside said base member, said surface layer containing low resistance fibers which are single-crystal fibers, wherein said surface layer has a base material of fluorine resin.
Claim 7
Dependent Claim
17 words
A roller according to claim 3, wherein said surface layer has a base material of polytetrafluoroethylene resin.
Claim 8
Dependent Claim
17 words
A roller according to claim 3, wherein said surface layer has a base material of perfluoroalkoxy resin.
Claim 9
Dependent Claim
49 words
A roller for fixing a toner image on a recording material, comprising: a base member; and a surface layer outside said base member, said surface layer containing low resistance fibers which are single-crystal fibers, wherein said fibers are of potassium titanate treated to be made a low resistance fibers.
Claim 10
Dependent Claim
49 words
A roller for fixing a toner image on a recording material, comprising: a base member; and a surface layer outside said base member, said surface layer containing low resistance fibers which are single-crystal fibers, wherein said fibers are of potassium titanate treated to be made a low resistance fibers.
Claim 11
Dependent Claim
40 words
A roller for fixing a toner image on a recording material, comprising: a base member; and a surface layer outside said base member, said surface layer containing low resistance fibers which are single-crystal fibers, wherein said fibers are of carbon.
Claim 12
Dependent Claim
40 words
A roller for fixing a toner image on a recording material, comprising: a base member; and a surface layer outside said base member, said surface layer containing low resistance fibers which are single-crystal fibers, wherein said fibers are of carbon.
Claim 13
Dependent Claim
58 words
A roller for fixing a toner image on a recording material, comprising: a base member; and a surface layer outside said base member, said surface layer containing low resistance fibers which are single-crystal fibers, further comprising an intermediate layer between said base member and said surface layer, wherein said intermediate layer contains straight-needle like single-crystal fibers mixed thereinto.
Claim 14
Dependent Claim
58 words
A roller for fixing a toner image on a recording material, comprising: a base member; and a surface layer outside said base member, said surface layer containing low resistance fibers which are single-crystal fibers, further comprising an intermediate layer between said base member and said surface layer, wherein said intermediate layer contains straight-needle like single-crystal fibers mixed thereinto.
Claim 15
Dependent Claim
26 words
A roller according to claim 1, 2, 3, 7, or 8, wherein the fibers have a volume resistivity of not more than 10 10 ohm. cm.
Claim 16
Dependent Claim
18 words
A roller according to claim 1, 2, 3, 7 or 8, wherein said fibers are of silicon carbide.
Claim 17
Dependent Claim
49 words
An image fixing apparatus for fixing a toner image on a recording material, comprising: a rotatable roller for being press-contacted to the recording material, said roller comprising: a base member; and a surface layer outside said base member, said surface layer containing low resistance fibers which are single-crystal fibers.
Claim 18
Dependent Claim
49 words
An image fixing apparatus for fixing a toner image on a recording material, comprising: a rotatable roller for being press-contacted to the recording material, said roller comprising: a base member; and a surface layer outside said base member, said surface layer containing low resistance fibers which are single-crystal fibers.
Claim 19
Dependent Claim
20 words
An apparatus according to claim 11, wherein the fibers have a volume resistivity of not more than 10 10 ohm.cm.
Claim 20
Dependent Claim
14 words
An apparatus according to claim 11, wherein the fibers have lengths of 5-30 microns.
Claim 21
Dependent Claim
25 words
An apparatus according to claim 11, wherein a content of the fibers is 2-20% by weight with respect to base material of the surface layer.
Claim 22
Independent Claim
20 words
An apparatus according to any one of claims 11-14, wherein said surface layer has a base material of fluorine resin.
Claim 23
Dependent Claim
17 words
An apparatus according to claim 15, wherein said surface layer has a base material of polytetrafluoroethylene resin.
Claim 24
Dependent Claim
17 words
An apparatus according to claim 15, wherein said surface layer has a base material of perfluoroalkoxy resin.
Claim 25
Independent Claim
24 words
An apparatus according to any one of claims 11-14, wherein the fibers are of potassium titanate treated to be made a low resistance fibers.
Claim 26
Independent Claim
16 words
An apparatus according to any one of claims 11-14, wherein said fibers are of silicon carbide.
Claim 27
Independent Claim
15 words
An apparatus according to any one of claims 11-14, wherein said fibers are of carbon.
Claim 28
Dependent Claim
28 words
An apparatus according to claim 11, further comprising an intermediate layer between said base member and said surface layer, wherein said intermediate layer contains single-crystal low resistance fibers.
Claim 29
Dependent Claim
14 words
An apparatus according to claim 11, further comprising means for electrically grounding said roller.
Claim 30
Dependent Claim
17 words
An apparatus according to claim 11, further comprising means for electrically grounding said roller through resistor means.
Claim 31
Dependent Claim
31 words
An apparatus according to claim 11, further comprising an other rotatable roller press-contactable to said rotatable roller, wherein said other rotatable roller has a surface layer containing single-crystal low resistance fibers.
Claim 32
Dependent Claim
28 words
An apparatus according to claim 24, wherein said first rotatable roller has a base material of resin and said other rotatable roller has a base material of rubber.
Claim 33
Dependent Claim
19 words
An apparatus according to claim 11, wherein said low resistance fibers are provided by deoxidizing high resistance single-crystal fibers.
Claim 34
Dependent Claim
12 words
An apparatus according to claim 26, wherein said fibers are oxide material.
Claim 35
Dependent Claim
21 words
An apparatus according to claim 26, wherein said low resistance fibers are provided by deoxidizing and sintering high resistance single-crystal fibers.
Claim 36
Dependent Claim
25 words
An apparatus according to claim 11, wherein said low resistance fibers are provided by coating surfaces of high resistance single-crystal fibers with low resistance material.
Claim 37
Dependent Claim
19 words
An apparatus according to claim 11, wherein the surface layer containing the single-crystal fibers further contains low resistance particles.
Claim 38
Dependent Claim
24 words
An apparatus according to claim 30, wherein the surface layer contains a lower content of the low resistance particles than of the single-crystal fibers.
Claim 39
Dependent Claim
38 words
An apparatus according to claim 30, wherein the contents of the single-crystal fibers and the low resistance particles are each not less than 3% by weight, and a total content thereof is not more than 20% by weight.
Claim 40
Dependent Claim
47 words
A roller for fixing a toner image on a recording material, comprising: a base member; and a surface layer outside said base member, said surface layer containing low resistance fibers which are single-crystal fibers, wherein said low resistance fibers are provided by deoxidizing high resistance single-crystal fibers.
Claim 41
Dependent Claim
47 words
A roller for fixing a toner image on a recording material, comprising: a base member; and a surface layer outside said base member, said surface layer containing low resistance fibers which are single-crystal fibers, wherein said low resistance fibers are provided by deoxidizing high resistance single-crystal fibers.
Claim 42
Dependent Claim
12 words
A roller according to claim 33, wherein said fibers are oxide material.
Claim 43
Dependent Claim
21 words
A roller according to claim 33, wherein said low resistance fibers are provided by deoxidizing and sintering high resistance single-crystal fibers.
Claim 44
Dependent Claim
53 words
A roller for fixing a toner image on a recording material, comprising: a base member; and a surface layer outside said base member, said surface layer containing low resistance fibers which are single-crystal fibers, wherein said low resistance fibers are provided by coating surfaces of high resistance single-crystal fibers with low resistance material.
Claim 45
Dependent Claim
53 words
A roller for fixing a toner image on a recording material, comprising: a base member; and a surface layer outside said base member, said surface layer containing low resistance fibers which are single-crystal fibers, wherein said low resistance fibers are provided by coating surfaces of high resistance single-crystal fibers with low resistance material.
Claim 46
Dependent Claim
47 words
A roller for fixing a toner image on a recording material, comprising: a base member; and a surface layer outside said base member, said surface layer containing low resistance fibers which are single-crystal fibers, wherein the surface layer containing the single-crystal fibers further contains low resistance particles.
Claim 47
Dependent Claim
47 words
A roller for fixing a toner image on a recording material, comprising: a base member; and a surface layer outside said base member, said surface layer containing low resistance fibers which are single-crystal fibers, wherein the surface layer containing the single-crystal fibers further contains low resistance particles.
Claim 48
Dependent Claim
24 words
A roller according to claim 37, wherein the surface layer contains a lower content of the low resistance particles than of the single-crystal fibers.
Claim 49
Dependent Claim
38 words
A roller according to claim 37, wherein the contents of the single-crystal fibers and the low resistance particles are each not less than 3% by weight, and a total content thereof is not more than 20% by weight.
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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) | 1994-09-02 | 1995-03-04 | 1995-09-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-09-02 | 1999-03-04 | 1999-09-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-09-02 | 2003-03-04 | 2003-09-03 | $7700.00 | Window Closed / Lapsed |