US5656187A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Image fixing apparatus with power supply control based in part on heating resistor temperature
Assignee: Canon Inc
•
Filing: 1995-07-10
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Granted: 1997-08-12
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Expires: 2015-07-10
Abstract
Abstract An image fixing apparatus includes a resistor for generating heat upon electric energy supply thereto; a temperature sensor for sensing a temperature of the resistor; and a control unit for controlling the electric energy supply to the resistor so that the temperature sensor detects a target temperature, in accordance with both of a temperature of the resistor and a resistance of the resistor.
Inventors
- 👤 Kazuki Miyamoto
- 👤 Koki Kuroda
- 👤 Naoyuki Ohki
- 👤 Masaki Nakano
- 👤 Takahiro Ushiro
- 👤 Yasuo Fukazu
- 👤 Atsushi Chaki
- 👤 Shinichi Takata
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 04:47
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/20; G03G15/2003; G03G15/2014; G03G15/2039; G03G2215/00; G03G2215/20; G03G2215/2003; G03G2215/2016; G03G2215/2022
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
75 words
An image fixing apparatus comprising: a resistor for generating heat upon electric energy supply thereto, wherein a resistance of said resistor increases with an increase in a temperature thereof; a temperature sensor for sensing a temperature of said resistor; control means for controlling the electric energy supply to said resistor so that said temperature sensor detects a target temperature, in accordance with both of a temperature of said resistor and a resistance of said resistor.
Claim 2
Dependent Claim
75 words
An image fixing apparatus comprising: a resistor for generating heat upon electric energy supply thereto, wherein a resistance of said resistor increases with an increase in a temperature thereof; a temperature sensor for sensing a temperature of said resistor; control means for controlling the electric energy supply to said resistor so that said temperature sensor detects a target temperature, in accordance with both of a temperature of said resistor and a resistance of said resistor.
Claim 3
Dependent Claim
40 words
An apparatus according to claim 1, wherein said control means comprises a correction circuit for correcting a voltage to be applied to said resistor in accordance with the temperature of said resistor, in accordance with the resistance of said resistor.
Claim 4
Dependent Claim
25 words
An apparatus according to claim 1, wherein said control means switches a voltage to be applied to said resistor in accordance with an input voltage.
Claim 5
Dependent Claim
37 words
An apparatus according to claim 1, further comprising an input portion for inputting the resistance of said resistor at a reference temperature, and said control means controls the voltage to be applied with accordance with the input.
Claim 6
Dependent Claim
33 words
An apparatus according to claim 1, further comprising a film movable together with a recording material carrying an unfixed image so that the unfixed image is heated by said resistor through said film.
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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) | 2000-08-11 | 2001-02-10 | 2001-08-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2004-08-11 | 2005-02-10 | 2005-08-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2008-08-11 | 2009-02-10 | 2009-08-12 | $7700.00 | Window Closed / Lapsed |