US5264902A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Image forming device
Assignee: Canon Inc
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Filing: 1993-01-14
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Granted: 1993-11-23
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Expires: 2013-01-14
Abstract
Abstract The image forming device of the present invention relates to an image forming device having a moving member which moves while pressing a recording material against an image carrying member as the means of transferring the image on the image carrying member to the recording material. Further, the image forming device has a pair of moving members for fixing the image by conveying the recording material sandwiched therebetween, of which the moving member on the side not in contact with the unfixed image is a moving member having an elastic material layer and a resin surface layer. Further, the present invention has the surface of the moving member of the fixing member on the side not in contact with the unfixed image which is better mold releasability with that of the moving member of the image forming device.
Inventors
- 👤 Koichi Suwa
- 👤 Masahiro Goto
- 👤 Takahiro Inoue
- 👤 Koichi Hiroshima
- 👤 Shinichi Tsukida
- 👤 Junichi Kato
- 👤 Hideyuki Yano
- 👤 Manabu Takano
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 19:49
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/20; G03G15/2003; G03G15/2014; G03G15/206
Claims Analysis
Total Claims: 40
Claim 1
Independent Claim
166 words
An image forming device comprising: a movable image bearing member; transfer means for transferring the image on said image bearing member, said transfer means having a moving member moving a recording material while pressing it against said image bearing member; and fixing means for fixing the image onto the recording material, said fixing means having a pair of moving members for fixing an unfixed image by conveying the recording material sandwiched therebetween, wherein a distance between a position where the moving member of said transfer means presses the recording material against said image bearing member and a position where said pair of moving members abut each other is shorter than a length of the recording material with the maximum size to be used, and wherein at least one of said paired moving members for fixing has a rubber layer and a surface resin layer, frictional coefficient of said surface resin layer being smaller than that of the surface of the moving member of said transfer means.
Claim 2
Dependent Claim
166 words
An image forming device comprising: a movable image bearing member; transfer means for transferring the image on said image bearing member, said transfer means having a moving member moving a recording material while pressing it against said image bearing member; and fixing means for fixing the image onto the recording material, said fixing means having a pair of moving members for fixing an unfixed image by conveying the recording material sandwiched therebetween, wherein a distance between a position where the moving member of said transfer means presses the recording material against said image bearing member and a position where said pair of moving members abut each other is shorter than a length of the recording material with the maximum size to be used, and wherein at least one of said paired moving members for fixing has a rubber layer and a surface resin layer, frictional coefficient of said surface resin layer being smaller than that of the surface of the moving member of said transfer means.
Claim 3
Dependent Claim
18 words
An image forming device according to claim 1, wherein said surface resin layer is a fluorine resin layer.
Claim 4
Dependent Claim
17 words
An image forming device according to claim 1, wherein said elastic material layer is a rubbery layer.
Claim 5
Dependent Claim
17 words
An image forming device according to claim 2, wherein said elastic material layer is a rubbery layer.
Claim 6
Dependent Claim
17 words
An image forming device according to claim 1, wherein said rubber layer is a silicone rubber layer.
Claim 7
Dependent Claim
17 words
An image forming device according to claim 4, wherein said rubbery layer is a silicone rubber layer.
Claim 8
Dependent Claim
37 words
An image forming device according to claim 2, wherein said fluorine resin layer is a surface layer obtained by coating a mixture of a fluorine resin and a fluorine rubber on said rubber layer followed by calcination.
Claim 9
Dependent Claim
19 words
An image forming device according to claim 1, wherein said surface resin layer is a fluorine resin tube layer.
Claim 10
Dependent Claim
48 words
An image forming device according to claim 2, wherein said fluorine resin layer is a surface layer obtained by coating a fluorine resin on the layer, which is obtained by coating a mixture of a fluorine resin and a fluorine rubber on said rubber layer followed by calcination.
Claim 11
Dependent Claim
17 words
An image forming device according to claim 5, wherein said rubber layer is a foamed material layer.
Claim 12
Dependent Claim
17 words
An image forming device according to claim 6, wherein said rubbery layer is a foamed material layer.
Claim 13
Dependent Claim
19 words
An image forming device according to claim 10, wherein said resin surface layer is a fluorine resin tube layer.
Claim 14
Dependent Claim
19 words
An image forming device according to claim 11, wherein said resin surface layer is a fluorine resin tube layer.
Claim 15
Dependent Claim
17 words
An image forming device according to claim 1, wherein said rubber layer is subjected to electroconductive treatment.
Claim 16
Dependent Claim
23 words
An image forming device according to claim 14, wherein said rubber layer has a volume resistivity value of 10 11 Ω·cm or less.
Claim 17
Dependent Claim
18 words
An image forming device according to claim 14, wherein said surface resin layer is subjected to electroconductive treatment.
Claim 18
Dependent Claim
22 words
An image forming device according to claim 16, wherein said resin surface layer has a volume resistivity value below 10 12 Ω·cm.
Claim 19
Dependent Claim
16 words
An image forming device according to claim 14, wherein said rubber is a silicone rubber layer.
Claim 20
Dependent Claim
18 words
An image forming device according to claim 18, wherein said surface resin layer is a fluorine resin layer.
Claim 21
Dependent Claim
17 words
An image forming device according to claim 19, wherein said rubber layer is a foamed material layer.
Claim 22
Dependent Claim
18 words
An image forming device according to claim 16, wherein said surface resin layer is a fluorine resin layer.
Claim 23
Dependent Claim
31 words
An image forming device according to claim 4, wherein the moving member on the side not in contact with said unfixed image has a core material earthed beneath said rubber layer.
Claim 24
Dependent Claim
31 words
An image forming device according to claim 16, wherein the moving member on the side not in contact with said unfixed image has a core material earthed beneath said rubber layer.
Claim 25
Dependent Claim
33 words
An image forming device according to claim 2, wherein the moving member on the side in contact with the unfixed image of said pair of moving members has a fluorine surface resin layer.
Claim 26
Dependent Claim
26 words
An image forming device according to claim 1, wherein the moving member on the side not in contact with said unfixed image is a rotary member.
Claim 27
Dependent Claim
17 words
An image forming device according to claim 25, wherein said fixing means is a heating fixing means.
Claim 28
Dependent Claim
22 words
An image forming device according to claim 1, wherein the moving member of said transfer means is a rotary member having elasticity.
Claim 29
Dependent Claim
32 words
An image forming device according to claim 27, wherein said rotary means has a foamed sponge rubber layer on the core material, and the formed sponge rubber layer constitutes the surface layer.
Claim 30
Dependent Claim
22 words
An image forming device according to claim 27, wherein said moving member of said transfer means is applied with a predetermined voltage.
Claim 31
Dependent Claim
18 words
An image forming device according to claim 28, wherein said moving member is applied with a predetermined voltage.
Claim 32
Dependent Claim
27 words
An image forming device according to claim 29, wherein said moving member is applied with a voltage of the opposite polarity during non-transfer to that during transfer.
Claim 33
Dependent Claim
27 words
An image forming device according to claim 30, wherein said moving member is applied with a voltage of the opposite polarity during non-transfer to that during transfer.
Claim 34
Dependent Claim
29 words
An image forming device according to claim 27, wherein said rotary member has a foamed sponge rubber layer on the core material, and has a surface rubber layer thereon.
Claim 35
Dependent Claim
37 words
An image forming device according to claim 1, wherein the lubricity of the surface of the moving members of said fixing means is better than that of the surface of the moving member of said transfer means.
Claim 36
Dependent Claim
25 words
An image forming device according to claim 14, wherein a bias is applied on one of the pair of moving members of said fixing means.
Claim 37
Dependent Claim
29 words
An image forming device according to claim 14, wherein a diode is connected in a predetermined direction to one of the pair of moving members of said fixing means.
Claim 38
Dependent Claim
29 words
An image forming device according to claim 1, wherein one of paired moving members not contacting with the unfixed image has said rubber layer and said surface resin layer.
Claim 39
Dependent Claim
23 words
An image forming device according to claim 1, wherein said moving member of transfer means has a surface layer made of sponge rubber.
Claim 40
Dependent Claim
16 words
An image forming apparatus according to claim 38, wherein said sponge rubber is a urethane rubber.
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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) | 1996-11-22 | 1997-05-24 | 1997-11-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-11-22 | 2001-05-24 | 2001-11-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-11-22 | 2005-05-24 | 2005-11-23 | $7700.00 | Window Closed / Lapsed |