US4829931A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fixation device
Assignee: Konica Minolta Inc
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Filing: 1987-05-13
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Granted: 1989-05-16
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Expires: 2007-05-13
Abstract
Abstract A fixation device which comprises a roller comprising a core member, a fluororesin-containing rubber layer on the core member and a fluororesin surface layer. The fluororesin surface layer has a thickness from 2 to 100 μm, preferably 5 to 30 μm, and surrounds and contacts the outside of the rubber layer.
Inventors
- 👤 Michio Mogi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 23:34
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/20; G03G15/2003; G03G15/2014; G03G15/2053; G03G15/2057
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
34 words
A fixation device which comprises a roller comprising a fluororesin-containing rubber layer and a fluororesin surface layer from 5 to 30 μm thick surrounding and in contact with the outside of said rubber layer.
Claim 2
Dependent Claim
34 words
A fixation device which comprises a roller comprising a fluororesin-containing rubber layer and a fluororesin surface layer from 5 to 30 μm thick surrounding and in contact with the outside of said rubber layer.
Claim 3
Dependent Claim
38 words
The fixation device of claim 1, wherein said roller comprises a core member, an elastic layer around said core member, said fluororesin-containing rubber layer around said elastic layer, and said fluororesin surface layer around said fluororesin-containing rubber layer.
Claim 4
Dependent Claim
63 words
A fixation device for fixing a recording material carrying toners on the surface thereof by pressing and transporting said recording material between two rollers; at least one of said rollers comprising a core member, a rubber layer containing fluororesin around said core member, and a hard fluororesin layer from 5 to 30 μm thick around the outer circumferential surface of said rubber layer.
Claim 5
Dependent Claim
63 words
A fixation device for fixing a recording material carrying toners on the surface thereof by pressing and transporting said recording material between two rollers; at least one of said rollers comprising a core member, a rubber layer containing fluororesin around said core member, and a hard fluororesin layer from 5 to 30 μm thick around the outer circumferential surface of said rubber layer.
Claim 6
Dependent Claim
39 words
The fixation device of claim 3, wherein both of said rollers comprise a core member, a rubber layer containing fluororesin around said core member and a fluororesin layer surrounding and in contact with the outside of said rubber layer.
References Cited (Backward Citations)
JPS5789785A
Cited
US4503179A
Cited
JPS585770A
Cited
JPS5827175A
Cited
US4375505A
Cited
JPS5890673A
Cited
JPS5974578A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-05-15 | 1992-11-14 | 1993-05-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-05-15 | 1996-11-14 | 1997-05-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-05-15 | 2000-11-14 | 2001-05-16 | $7700.00 | Window Closed / Lapsed |