US5243393A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotatory member for fixing and fixing device having the rotatory member
Assignee: Canon Inc
•
Filing: 1990-05-29
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Granted: 1993-09-07
•
Expires: 2010-05-29
Abstract
Abstract A rotatory member for fixing toner image onto a support member supporting toner image includes a core member, a first rubber layer provided on the core member, a second rubber layer provided on the first rubber layer, and a third rubber layer provided as the surface layer on the second rubber layer. Here, by making the third rubber layer, the second rubber layer and the first rubber layer to have their elongations larger in the order mentioned, peeling between the respective layers is prevented so as to withstand prolonged usage.
Inventors
- 👤 Takeshi Menjo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 06:44
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/20; G03G15/2003; G03G15/2014; G03G15/2053; G03G15/2057; G03G2215/00; G03G2215/20; G03G2215/2003; G03G2215/2048; G03G2215/2051; G03G2215/2054
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
95 words
A rotatory member for fixing a toner image onto a support material supporting the toner image comprising: a first rubber layer comprised of a first rubber; a second rubber layer comprised of a second rubber and provided on said first rubber layer; and a third rubber layer comprised of a third rubber and provided on said second rubber layer as a surface layer, wherein elongation of said third rubber layer is larger than elongation of said second rubber layer and elongation of said second rubber layer is larger than elongation of said first rubber layer.
Claim 2
Dependent Claim
95 words
A rotatory member for fixing a toner image onto a support material supporting the toner image comprising: a first rubber layer comprised of a first rubber; a second rubber layer comprised of a second rubber and provided on said first rubber layer; and a third rubber layer comprised of a third rubber and provided on said second rubber layer as a surface layer, wherein elongation of said third rubber layer is larger than elongation of said second rubber layer and elongation of said second rubber layer is larger than elongation of said first rubber layer.
Claim 3
Dependent Claim
22 words
A rotatory member according to claim 1, wherein a release agent for preventing off-set of toner is supplied to said rotatory member.
Claim 4
Dependent Claim
27 words
A rotatory member according to claim 2, wherein said second rubber layer is a layer which prevents penetration of the release agent into said first rubber layer.
Claim 5
Dependent Claim
15 words
A rotatory member according to claim 3, wherein said release agent is a silicone oil.
Claim 6
Dependent Claim
33 words
A rotatory member according to any one of claim 1 to 4, wherein said first and third rubber layers are silicone rubber layers, and said second rubber layer is a fluorine rubber layer.
Claim 7
Dependent Claim
20 words
A rotatory member according to claim 1, further including a core member on which said first rubber layer is provided.
Claim 8
Dependent Claim
23 words
A rotatory member according to claim 1, wherein thickness of said first rubber layer is largest among said first to third rubber layers.
Claim 9
Dependent Claim
132 words
A fixing device for fixing a toner image onto a support material supporting the toner image comprising: a pair of rotatory members for conveying said support material sandwiched therebetween, at least one of the pair of rotatory members having a first rubber layer comprised of a first rubber, a second rubber layer comprised of a second rubber and provided on the first rubber layer; a third rubber layer comprised of a third rubber and provided on the second rubber layer as a surface layer, elongation of said third rubber layer being larger than elongation of said second rubber layer and elongation of said second rubber layer being larger than elongation of said first rubber layer; and means fur supplying a release agent to at least one of said pair of rotatory members.
Claim 10
Dependent Claim
132 words
A fixing device for fixing a toner image onto a support material supporting the toner image comprising: a pair of rotatory members for conveying said support material sandwiched therebetween, at least one of the pair of rotatory members having a first rubber layer comprised of a first rubber, a second rubber layer comprised of a second rubber and provided on the first rubber layer; a third rubber layer comprised of a third rubber and provided on the second rubber layer as a surface layer, elongation of said third rubber layer being larger than elongation of said second rubber layer and elongation of said second rubber layer being larger than elongation of said first rubber layer; and means fur supplying a release agent to at least one of said pair of rotatory members.
Claim 11
Dependent Claim
27 words
A fixing device according to claim 8, wherein said second rubber layer is a layer for preventing penetration of the release agent into said first rubber layer.
Claim 12
Dependent Claim
15 words
A fixing device according to claim 9, wherein said release agent is a silicone oil.
Claim 13
Dependent Claim
36 words
A fixing device according to any of claims 8 to 10, wherein the rotatory member having said first, second and third rubber layers is the rotatory member on the side in contact with unfixed toner image.
Claim 14
Dependent Claim
28 words
A fixing device according to claim 11, wherein said first and third rubber layers are silicone rubber layers, and said second rubber layer is a fluorine rubber layer.
Claim 15
Dependent Claim
22 words
A fixing device according to claim 8, wherein at least one of said pair of rotatory members is heated by heating means.
Claim 16
Dependent Claim
19 words
A fixing device according to claim 13, wherein said fixing device is used for a full-color image forming device.
Claim 17
Dependent Claim
26 words
A rotatory member according to claim 8, wherein said first to third rubber layer includes a core member on which said first rubber layer is provided.
Claim 18
Dependent Claim
22 words
A rotatory member according to claim 8, wherein thickness of said first rubber is largest among said first to third rubber layers.
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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) | 1996-09-06 | 1997-03-08 | 1997-09-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-09-06 | 2001-03-08 | 2001-09-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-09-06 | 2005-03-08 | 2005-09-07 | $7700.00 | Window Closed / Lapsed |