Patent US4668537A successfully refreshed from Google Patents.
US4668537A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for applying a releasing agent
Assignee: Sumitomo Electric Industries Ltd
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Filing: 1985-06-11
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Granted: 1987-05-26
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Expires: 2005-06-11
Abstract
Abstract A releasing agent applicator for a toner fixing apparatus including a hot fixing roller and an elastic pressing roller between which toner, transferred onto copying paper, is fixed. It includes a heat resistant felt for holding a releasing agent. A porous polymer membrane is disposed between the felt and the fixing roller. A heat resistant polymer film is thermally fused between the felt and the membrane to bond the membrane to the felt except that portion of the membrane which is brought into contact with the fixing roller. The felt is impregnated with releasing agent and that portion of the membrane without the film may be brought into contact with the fixing roller to allow the releasing agent to be applied to the fixing roller.
Inventors
- 👤 Fumio Matsuyama
- 👤 Chiaki Kato
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 08:19
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/20; G03G15/2003; G03G15/2014; G03G15/2017; G03G15/2025; G03G2215/00; G03G2215/20; G03G2215/2093; G03G2215/2096
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
64 words
A sliding-type releasing agent applicator comprising: a heat resistant felt for holding a releasing agent; a porous polymer membrane; and means for binding said felt to said membrane, said binding means comprising a heat resistant fluorine-containing polymer film disposed between said felt and said membrane and thermally fused therewith to bond said membrane to said felt except for a predetermined portion of said membrane.
Claim 2
Dependent Claim
64 words
A sliding-type releasing agent applicator comprising: a heat resistant felt for holding a releasing agent; a porous polymer membrane; and means for binding said felt to said membrane, said binding means comprising a heat resistant fluorine-containing polymer film disposed between said felt and said membrane and thermally fused therewith to bond said membrane to said felt except for a predetermined portion of said membrane.
Claim 3
Dependent Claim
17 words
An applicator as set forth in claim 1, wherein said membrane is a porous tetrafluoroethylene resin membrane.
Claim 4
Dependent Claim
16 words
An applicator as set forth in claim 1, wherein said fluorine-containing polymer film is tetrafluoroethylene-hexafluoro-propylene copolymer.
Claim 5
Dependent Claim
136 words
Toner fixing apparatus comprising: a rotatable hot fixing roller; an elastic pressing roller diposed contiguous to said hot fixing roller, toner disposed on copying paper being fixed between said hot fixing roller and said elastic pressing roller; and an applicator for applying a releasing agent to said hot fixing roller as said applicator slides on the surface of said hot fixing roller including: a heat resistant felt for holding said releasing agent, a porous polymer membrane disposed between said felt and said fixing roller, and means for binding said felt to said membrane, said binding means comprising a heat resistant fluorine-containing polymer film disposed between said felt and said membrane and thermally fused therewith to bond said membrane to said felt except that portion of said membrane which is brought into contact with said fixing roller.
Claim 6
Dependent Claim
136 words
Toner fixing apparatus comprising: a rotatable hot fixing roller; an elastic pressing roller diposed contiguous to said hot fixing roller, toner disposed on copying paper being fixed between said hot fixing roller and said elastic pressing roller; and an applicator for applying a releasing agent to said hot fixing roller as said applicator slides on the surface of said hot fixing roller including: a heat resistant felt for holding said releasing agent, a porous polymer membrane disposed between said felt and said fixing roller, and means for binding said felt to said membrane, said binding means comprising a heat resistant fluorine-containing polymer film disposed between said felt and said membrane and thermally fused therewith to bond said membrane to said felt except that portion of said membrane which is brought into contact with said fixing roller.
Claim 7
Dependent Claim
17 words
An applicator as set forth in claim 4, wherein said membrane is a porous tetrafluoroethylene resin membrane
Claim 8
Dependent Claim
16 words
An applicator as set forth in claim 4, wherein said fluorine-containing polymer film is teterafluoroethylene-hexafluoro-propylene copolymer.
Claim 9
Independent Claim
83 words
A method of applying releasing agent to a fixing roller comprising the steps of: impregnating a heat resistant felt of an applicator with said releasing agent, said applicator including said heat resistant felt, a porous polymer membrane and a heat resistant fluorine-containing polymer film disposed between said felt and said membrane; binding through thermal fusion said membrane to said felt except for a predetermied portion of said membrane; and sliding said predetermined portion of said membrane. along the surface of said fixing roller.
Claim 10
Independent Claim
83 words
A method of applying releasing agent to a fixing roller comprising the steps of: impregnating a heat resistant felt of an applicator with said releasing agent, said applicator including said heat resistant felt, a porous polymer membrane and a heat resistant fluorine-containing polymer film disposed between said felt and said membrane; binding through thermal fusion said membrane to said felt except for a predetermied portion of said membrane; and sliding said predetermined portion of said membrane. along the surface of said fixing roller.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-05-25 | 1990-11-24 | 1991-05-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-05-25 | 1994-11-24 | 1995-05-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-05-25 | 1998-11-24 | 1999-05-26 | $7700.00 | Window Closed / Lapsed |