Patent US5196675A successfully refreshed from Google Patents.
US5196675A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Image fixing apparatus having a heater, a movable film and electrical insulating member disposed at latent end
Assignee: Canon Inc
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Filing: 1990-12-31
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Granted: 1993-03-23
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Expires: 2010-12-31
Abstract
Abstract An image fixing apparatus includes a movable film movable together and in contact with a recording material supporting a visualized image, the film having a base layer of insulating material and a surface low resistance layer contactable to the visualized image, the surface layer containing low resistance material; a heater extending in a direction crossing with a movement direction of the film, the film being in contact with the base layer of the film, the heater including a base plate, an electric resistance layer producing heat by electric power supply and extending along a longitudinal direction of the film adjacent the film and a protection layer for protecting the electric resistance layer; and an insulating material between the film and the protection layer only at lateral end portions of the film.
Inventors
- 👤 Yoshihiko Suzuki
- 👤 Koki Kuroda
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 12:25
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/20; G03G15/2003; G03G15/2014; G03G15/2064
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
134 words
An image fixing apparatus, comprising: a movable film movable together and in contact with a recording material supporting a visualized image, said film having a base layer made of electrically insulating material and a low resistance surface layer contactable to the visualized image, said surface layer containing low electric resistance material; a heater extending in a direction crossing with a movement direction of said film, said heater being in contact with the base layer of said film, said heater including a base plate, an electric resistance layer producing heat from electric power and extending along a longitudinal direction of said film adjacent said film and a protection layer for protecting said electric resistance layer; and a thermally insulating member between said film and said protection layer only at lateral end portions of said film.
Claim 2
Dependent Claim
134 words
An image fixing apparatus, comprising: a movable film movable together and in contact with a recording material supporting a visualized image, said film having a base layer made of electrically insulating material and a low resistance surface layer contactable to the visualized image, said surface layer containing low electric resistance material; a heater extending in a direction crossing with a movement direction of said film, said heater being in contact with the base layer of said film, said heater including a base plate, an electric resistance layer producing heat from electric power and extending along a longitudinal direction of said film adjacent said film and a protection layer for protecting said electric resistance layer; and a thermally insulating member between said film and said protection layer only at lateral end portions of said film.
Claim 3
Dependent Claim
24 words
An apparatus according to claim 1, wherein said low resistance surface layer is of fluorinated resin to which the low resistance material is added.
Claim 4
Dependent Claim
15 words
An apparatus according to claim 1, wherein said low resistance surface layer is electrically grounded.
Claim 5
Dependent Claim
25 words
An apparatus according to claim 1, wherein said film is in the form of an endless belt, and said insulating member has a predetermined width.
Claim 6
Dependent Claim
17 words
An apparatus according to claim 1, wherein said film has a thickness not more than 100 microns.
Claim 7
Dependent Claim
17 words
An apparatus according to claim 5, wherein said film has a thickness not more than 40 microns.
Claim 8
Dependent Claim
23 words
An apparatus according to claim 1, further comprising a pressing member for pressing the recording material to said film and toward said heater.
Claim 9
Dependent Claim
15 words
An apparatus according to claim 1, wherein said insulating member is heat resistive resin material.
Claim 10
Dependent Claim
15 words
An apparatus according to claim 8, wherein the heat resistive resin material comprises polyimide resin.
Claim 11
Dependent Claim
33 words
An apparatus according to claim 1, wherein said heater includes power supply electrodes for supplying electric power to said electric resistance layer outside said insulating member in a longitudinal direction of said heater.
Claim 12
Dependent Claim
20 words
An apparatus according to claim 1, wherein said insulating member is provided at each longitudinal end portions of said film.
Claim 13
Dependent Claim
12 words
An apparatus according to claim 1, wherein said protection layer is glass.
Claim 14
Dependent Claim
16 words
An apparatus according to claim 1, wherein said insulating member is outside an image fixing area.
Claim 15
Dependent Claim
28 words
An apparatus according to claim 1, wherein said low resistance surface layer is on said base layer, and has a thickness smaller than that of said base layer.
Claim 16
Dependent Claim
67 words
An apparatus according to claim 1, wherein said base plate is good thermally conductive material, and the temperature of said heater is detected by a temperature detecting element on a side of said base plate opposite from the side having the electric resistance layer, and the electric power supplied to the electric resistance layer is controlled on the basis of an output of the temperature detecting element.
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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) | 1996-03-22 | 1996-09-21 | 1997-03-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-03-22 | 2000-09-21 | 2001-03-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-03-22 | 2004-09-21 | 2005-03-23 | $7700.00 | Window Closed / Lapsed |