US5051784A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Image fixing apparatus with roughened film in sliding contact with heater
Assignee: Canon Inc
•
Filing: 1990-06-22
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Granted: 1991-09-24
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Expires: 2010-06-22
Abstract
Abstract An image fixing apparatus includes a heater which is stationary in use; a film for sliding contact with the heater and movable together with a recording material, wherein the recording material has a visualized image, which is heated through the film by heat from the heater; and wherein that surface of the film for sliding contact with the heater has a surface roughness of 0.5-7 microns at least in a direction perpendicular to a movement direction of the film.
Inventors
- 👤 Akira Yamamoto
- 👤 Shigeo Kumura
- 👤 Kensaku Kusaka
- 👤 Hidekazu Maruta
- 👤 Hiroyuki Adachi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 00:33
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/20; G03G15/2003; G03G15/2014; G03G15/2064; G03G15/2053; G03G2215/00; G03G2215/20; G03G2215/2003; G03G2215/2016; G03G2215/2035; G03G2215/2038
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
52 words
An image fixing apparatus, comprising: a heater which is stationary in use; and a film movable in sliding contact with said heater at one side thereof and movable in contact with a recording material at the other side, wherein said one side of said film has a surface roughness of 0.5-7 microns.
Claim 2
Dependent Claim
52 words
An image fixing apparatus, comprising: a heater which is stationary in use; and a film movable in sliding contact with said heater at one side thereof and movable in contact with a recording material at the other side, wherein said one side of said film has a surface roughness of 0.5-7 microns.
Claim 3
Dependent Claim
20 words
An apparatus according to claim 1, wherein said surface on said one side of said film is of polyimide resin.
Claim 4
Dependent Claim
12 words
An apparatus according to claim 1, wherein said film contains filler material.
Claim 5
Dependent Claim
20 words
An apparatus according to claim 1, wherein at least said surface on said one side of said film is roughened.
Claim 6
Dependent Claim
20 words
An apparatus according to claim 1, wherein at least said surface on said one side of said film is sand-blasted.
Claim 7
Dependent Claim
18 words
An apparatus according to claim 1, wherein said film is produced with a dye having a roughened surface.
Claim 8
Dependent Claim
31 words
An apparatus according to claim 1, wherein a surface of said heater contactable with said film comprises a glass layer, and said film is in sliding contact with the glass layer.
Claim 9
Dependent Claim
19 words
An apparatus according to claim 1, wherein said surface of said film has a surface roughness of 1-5 microns.
Claim 10
Dependent Claim
18 words
An apparatus according to claim 8, wherein said film has a thickness of not more than 100 microns.
Claim 11
Dependent Claim
24 words
An apparatus according to claim 9, wherein said film has a thickness of not less than 10 microns and not more than 50 microns.
Claim 12
Dependent Claim
33 words
An apparatus according to claim 1, wherein said heater comprises a resistance material extending in a direction perpendicular to the movement direction of said film and producing heat by electric power supply thereto.
Claim 13
Dependent Claim
20 words
An apparatus according to claim 11, wherein there is no air layer between the resistance material and the visualized image.
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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) | 1994-09-23 | 1995-03-25 | 1995-09-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-09-23 | 1999-03-25 | 1999-09-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-09-23 | 2003-03-25 | 2003-09-24 | $7700.00 | Window Closed / Lapsed |