US4034189A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for heat fixation
Assignee: Canon Inc
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Filing: 1975-05-30
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Granted: 1977-07-05
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Expires: 1995-05-30
Abstract
Abstract A device for heat fixation comprises a heating member comprising a heat resistant insulating support, a heat generating member provided on the support and a thin film of heat resistance, low surface tension and low friction coefficient overlying the heat generating member.
Inventors
- 👤 Hisashi Sakamaki
- 👤 Toshiyuki Ohtani
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 11:49
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/20; G03G15/2003; G03G15/2014; G03G15/2053; G03G15/2057
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
92 words
In a heat fixing device for fixing an electrophotographic image developed with a developer containing a toner composition onto a copy material comprising a heating member having a heat resistant insulating support and a heat generating member on said support, the improvement for protecting the heat generating member, preventing the buildup of developer and minimizing friction and abrasion between the heat fixing device and the copy material comprising a heat resistant, thin film coating having a film thickness up to about 30 microns for said heating member overlying said heat generating member.
Claim 2
Dependent Claim
92 words
In a heat fixing device for fixing an electrophotographic image developed with a developer containing a toner composition onto a copy material comprising a heating member having a heat resistant insulating support and a heat generating member on said support, the improvement for protecting the heat generating member, preventing the buildup of developer and minimizing friction and abrasion between the heat fixing device and the copy material comprising a heat resistant, thin film coating having a film thickness up to about 30 microns for said heating member overlying said heat generating member.
Claim 3
Dependent Claim
17 words
A device according to claim 1 in which the heating member is in a form of plane.
Claim 4
Dependent Claim
21 words
A device according to claim 1 in which the thin film overlying the heat generating member comprises an organic fluorinecontaining compound.
Claim 5
Dependent Claim
20 words
A device according to claim 1 in which the thin film overlying the heat generating member comprises a siliconcontaining compound.
References Cited (Backward Citations)
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US3469077A
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US3399292A
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US3496333A
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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) | 1980-07-04 | 1981-01-03 | 1981-07-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-07-04 | 1985-01-03 | 1985-07-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-07-04 | 1989-01-03 | 1989-07-05 | $7700.00 | Window Closed / Lapsed |