Patent US4804576A successfully refreshed from Google Patents.
US4804576A
Expired / Lapsed
US
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Elastic rotatable member
Assignee: Ist KK
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Filing: 1986-02-21
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Granted: 1989-02-14
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Expires: 2006-02-21
Abstract
Abstract An elastic rotatable member usable for image fixing includes an elastic layer having a roughened surface, a resin layer formed by applying a liquid resin on the surface of the elastic layer and heating it up to a temperature not lower than its crystalline melting point and then quickly cooling it, wherein the resin layer has a side near the elastic layer, having a number of fine concave and convex portions, and wherein the convex portions are in concave portions of the surface of the elastic layer, and the concave portions of the resin layer is pressed by the convex portions of the elastic layer.
Inventors
- 👤 Tsukasa Kuge
- 👤 Masahiro Goto
- 👤 Isamu Sakane
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 19:57
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/65; B; B65; B65H; B65H27/00; G03G15/20; G03G15/2003; G03G15/2014; G03G15/2053; G03G15/2057; B65H2404/00; B65H2404/10; B65H2404/18; B65H2404/181; B65H2404/185; B65H2404/50; B65H2404/52; B65H2404/521; G03G2215/00; G03G2215/00362; G03G2215/00367; G03G2215/00371; G03G2215/00535; G03G2215/00679; G03G2215/00683; Y; Y10; Y10S; Y10S428/00; Y10S428/909; Y10T; Y10T428/00; Y10T428/24; Y10T428/24942; Y10T428/2495; Y10T428/24967; Y10T428/24975; Y10T428/31504; Y10T428/3154; Y10T428/31544; Y10T428/31652; Y10T428/31663; Y10T428/31667; Y10T428/31678; Y10T428/31692; Y10T428/31855; Y10T428/31909
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
141 words
An elastic rotatable member comprising: a core member; an elastic layer outside said core member and having a roughened surface; and a sintered resin layer coating the roughened surface of said elastic layer; wherein a thickness td (micron) of said resin layer measured by physical contact therewith after it is peeled off said elastic layer, and a thickness of said resin layer tw (micron) determined by conversion of weight of said resin layer, satisfy a relationship of 0.5≦(td-tw)≦5, and wherein said thickness tw and a thickness tm (microns) of the resin layer determined as |d.sub. -d 2 |/2, where d 1 is an outer diameter of the elastic rotatable member having said resin layer measured without contact thereto, and d 2 is an outer diameter thereof after said resin layer is peeled off measured without contact, satisfy the relationship of tw>tm.
Claim 2
Dependent Claim
141 words
An elastic rotatable member comprising: a core member; an elastic layer outside said core member and having a roughened surface; and a sintered resin layer coating the roughened surface of said elastic layer; wherein a thickness td (micron) of said resin layer measured by physical contact therewith after it is peeled off said elastic layer, and a thickness of said resin layer tw (micron) determined by conversion of weight of said resin layer, satisfy a relationship of 0.5≦(td-tw)≦5, and wherein said thickness tw and a thickness tm (microns) of the resin layer determined as |d.sub. -d 2 |/2, where d 1 is an outer diameter of the elastic rotatable member having said resin layer measured without contact thereto, and d 2 is an outer diameter thereof after said resin layer is peeled off measured without contact, satisfy the relationship of tw>tm.
Claim 3
Dependent Claim
22 words
A member according to claim 1, wherein said elastic layer is of silicone rubber, and said resin layer is of fluorine resin.
Claim 4
Dependent Claim
21 words
A member according to claim 1, wherein the outer diameter d 1 is larger than the outer diameter d 2 .
Claim 5
Dependent Claim
36 words
A member according to claim 3, wherein said silicone rubber layer has an impact resilience of 65-85%, and wherein the strength of a coating of the fluorine resin is not less than 50 kg/cm 2 .
Claim 6
Dependent Claim
19 words
A member according to claim 4, wherein said fluorine resin layer is of PTFE or PFA of pure resin.
Claim 7
Dependent Claim
18 words
A member according to claim 1, wherein the following relationships are satisfied; d.sub.1 >d.sub.2, and (d.sub.1 -d.sub.2)≧3 microns.
Claim 8
Dependent Claim
19 words
A member according to claim 1, wherein said resin layer has a thickness of not less than 15 microns.
Claim 9
Dependent Claim
173 words
A fixing apparatus comprising: a first rotatable member and a second rotatable member for forming a nip therebetween to fix an unfixed image while it is being passed through the nip; said first rotatable member comprising: a core member; an elastic layer outside said core member and having a roughened surface; and a sintered resin layer coating the roughened surface of said elastic layer; wherein a thickness td (micro) of said resin layer measured by physical contact therewith after it is peeled off said elastic layer, and a thickness of said resin layer tw (micron) determined by conversion of weight of said resin layer, satisfy a relationship of 0.5≦(td-tw)≦5, and wherein said thickness tw and a thickness tm (microns) of the resin layer determined as |d 1 -d 2 |/2, where d 1 is an outer diameter of the elastic rotatable member having said resin layer measured without contact thereto, and d 2 is an outer diameter thereof after said resin layer is peeled off measured without contact, satisfy the relationship of tw>tm.
Claim 10
Dependent Claim
173 words
A fixing apparatus comprising: a first rotatable member and a second rotatable member for forming a nip therebetween to fix an unfixed image while it is being passed through the nip; said first rotatable member comprising: a core member; an elastic layer outside said core member and having a roughened surface; and a sintered resin layer coating the roughened surface of said elastic layer; wherein a thickness td (micro) of said resin layer measured by physical contact therewith after it is peeled off said elastic layer, and a thickness of said resin layer tw (micron) determined by conversion of weight of said resin layer, satisfy a relationship of 0.5≦(td-tw)≦5, and wherein said thickness tw and a thickness tm (microns) of the resin layer determined as |d 1 -d 2 |/2, where d 1 is an outer diameter of the elastic rotatable member having said resin layer measured without contact thereto, and d 2 is an outer diameter thereof after said resin layer is peeled off measured without contact, satisfy the relationship of tw>tm.
Claim 11
Dependent Claim
25 words
An apparatus according to claim 8, wherein said first rotatable member is provided therein with a heating source and is contactable with an unfixed image.
Claim 12
Dependent Claim
22 words
An apparatus according to claim 9, wherein said elastic layer is of silicone rubber, and said resin layer is of fluorine resin.
Claim 13
Dependent Claim
29 words
An apparatus according to claim 8, wherein the outer diameter d 1 is larger than the outer diameter d 2 , and wherein (d 1 -d 2 )≧3 microns.
Claim 14
Dependent Claim
36 words
An apparatus according to claim 10, wherein said silicone rubber layer has an impulse elasticity of 65-85%, and wherein the strength of a coating of the fluorine resin is not less than 50 kg/cm 2 .
Claim 15
Dependent Claim
19 words
An apparatus according to claim 12, wherein said fluorine resin layer is of PTFE or PFA of pure resin.
Claim 16
Dependent Claim
20 words
An apparatus according to claim 8, wherein said second rotatable member satisfies the relationships defined for said first rotatable member.
Claim 17
Dependent Claim
19 words
An apparatus according to claim 8, wherein said resin layer has a thickness of not less than 15 microns.
References Cited (Backward Citations)
DE69542C
Cited
US2794240A
Cited
US2764505A
Cited
US3435500A
Cited
US3912901A
Cited
US4149797A
Cited
DE7801417U1
Cited
JPS59382A
Cited
EP0142716A2
Cited
DE3518705A1
Cited
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| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1992-02-14 | 1992-08-15 | 1993-02-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-02-14 | 1996-08-15 | 1997-02-14 | $3760.00 | Window Closed / Lapsed |
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