Patent US5401936A successfully refreshed from Google Patents.
US5401936A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heating apparatus using heater having heat-resistive resin layer
Assignee: Canon Inc
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Filing: 1993-08-04
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Granted: 1995-03-28
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Expires: 2013-08-04
Abstract
Abstract A heating apparatus includes a heater; a film in slidable contact with the heater and movable together with a recording material carrying an image, such that the image is heated by heat from the heater through the film. The heater is provided with a heat resistive resin layer for sliding contact with the film.
Inventors
- 👤 Kensaku Kusaka
- 👤 Akira Yamamoto
- 👤 Shigeo Kimura
- 👤 Atsushi Hosoi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 05:55
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/20; G03G15/2003; G03G15/2014; G03G15/2064
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
77 words
A heating apparatus, comprising: a heater comprising a heat generating resistor element generating heat upon electric power supply thereto and a protection layer covering said heat generating resistor element; and a film in slidable contact with said protection layer and movable together with a recording material carrying thereon an image, wherein the image is heated by heat from said heat generating resistor element through said film, and wherein said protection layer is made of a resin material.
Claim 2
Dependent Claim
77 words
A heating apparatus, comprising: a heater comprising a heat generating resistor element generating heat upon electric power supply thereto and a protection layer covering said heat generating resistor element; and a film in slidable contact with said protection layer and movable together with a recording material carrying thereon an image, wherein the image is heated by heat from said heat generating resistor element through said film, and wherein said protection layer is made of a resin material.
Claim 3
Dependent Claim
15 words
An apparatus according to claim 1, wherein said protection layer contains high thermal conductivity material.
Claim 4
Dependent Claim
26 words
An apparatus according to claim 1, wherein said heat generating resistor is formed on a base plate, and said protection layer extends on said base plate.
Claim 5
Dependent Claim
19 words
An apparatus according to claim 1, wherein the image is an unfixed image, and said apparatus heat-fixes the image.
Claim 6
Dependent Claim
19 words
An apparatus according to claim 1, wherein said protection layer has a thickness of not more than 40 microns.
Claim 7
Dependent Claim
19 words
An apparatus according to claim 5, wherein said protection layer has a thickness of not more than 15 microns.
Claim 8
Dependent Claim
25 words
An apparatus according to claim 1, wherein said protection layer has a dynamic friction coefficient relative to said film which is not more than 0.5.
Claim 9
Dependent Claim
23 words
An apparatus according to claim 2, wherein said protection layer has a thermal conductivity of not less than 4×10 -4 cal/sec/cm 2 °C./cm.
Claim 10
Dependent Claim
29 words
An apparatus according to claim 1, wherein said protection layer has a surface resistance which is not less than 100 times a surface resistance of said heat generating resistor.
Claim 11
Dependent Claim
19 words
An apparatus according to claim 2, wherein the content of the high thermal conductivity material is 2-20% by weight.
Claim 12
Dependent Claim
12 words
An apparatus according to claim 1, wherein said protection layer contains oil.
Claim 13
Dependent Claim
16 words
An apparatus according to claim 1, wherein said protection layer is made of a fluorinated resin.
Claim 14
Dependent Claim
12 words
An apparatus according to claim 11, wherein said protection layer is porous.
Claim 15
Dependent Claim
12 words
An apparatus according to claim 11, wherein the oil is fluorine oil.
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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) | 1998-03-27 | 1998-09-26 | 1999-03-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2002-03-27 | 2002-09-26 | 2003-03-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2006-03-27 | 2006-09-26 | 2007-03-28 | $7700.00 | Window Closed / Lapsed |