US5493379A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heater having contacts for AC and DC
Assignee: Canon Inc
•
Filing: 1993-11-30
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Granted: 1996-02-20
•
Expires: 2013-11-30
Abstract
Abstract A heater with a base member has a resistor extended along a length of the base member and generating heat upon electric power supply thereto. Also provided is a temperature detecting element for detecting the temperature of the base member, and first and second electric power supply contacts for supplying electric power to the resistor, the first contacts being provided only adjacent a first longitudinal end of the base member and the second contacts being provided only adjacent a second longitudinal end of the base member.
Inventors
- 👤 Akira Kuroda
- 👤 Nobukazu Adachi
- 👤 Takeshi Sugita
- 👤 Akira Yuza
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 05:10
CPC Classifications
H; H05; H05B; H05B3/00; H05B3/10; H05B3/16; H05B1/00; H05B1/02; H05B1/0227; H05B1/023; H05B1/0241; H05B3/12
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
98 words
A heater comprising: a base member having first and second longitudinal ends; a resistor extended along a length of said base member, said resistor generating heat upon electric power supply thereto; temperature detecting element for detecting a temperature of said base member; first electric power supply contacts for supplying electric power to said resistor, said first contacts being provided only adjacent the first longitudinal end of said base member; second electric power supply contacts for supplying electric power to said temperature detecting element, said second contacts being provided only adjacent the second longitudinal end of said base member.
Claim 2
Dependent Claim
98 words
A heater comprising: a base member having first and second longitudinal ends; a resistor extended along a length of said base member, said resistor generating heat upon electric power supply thereto; temperature detecting element for detecting a temperature of said base member; first electric power supply contacts for supplying electric power to said resistor, said first contacts being provided only adjacent the first longitudinal end of said base member; second electric power supply contacts for supplying electric power to said temperature detecting element, said second contacts being provided only adjacent the second longitudinal end of said base member.
Claim 3
Dependent Claim
15 words
A heater according to claim 1, wherein said base member has a high thermal conductivity.
Claim 4
Dependent Claim
19 words
A heater according to claim 1, wherein said resistor is supplied with the electric power having a predetermined frequency.
Claim 5
Dependent Claim
16 words
A heater according to claim 3, wherein said resistor is supplied with an AC electric power.
Claim 6
Dependent Claim
17 words
A heater according to claim 3, wherein said temperature detecting element is supplied with a DC power.
Claim 7
Dependent Claim
32 words
A heater according to claim 1, wherein said first contacts are provided on one side of said base member, and said second contacts are provided on one side of said base member.
Claim 8
Dependent Claim
53 words
A heater according to claim 1, wherein said heater is used for an image fixing apparatus for heat-fixing an image on a recording material, and wherein said fixing apparatus comprises electric power supply control means for controlling electric power supply to said resistor in accordance with an output of said temperature detecting element.
Claim 9
Dependent Claim
28 words
A heater according to claim 7, wherein said power supply control means controls the electric power supply such that said temperature detecting elements produces a predetermined target output.
Claim 10
Dependent Claim
35 words
A heater according to claim 7, wherein said fixing apparatus further comprises a film in sliding contact with said heater, and a back-up member for forming a nip with said heater with said film therebetween.
Claim 11
Dependent Claim
150 words
An image fixing apparatus, comprising: a heater; a film in slidable contact with said heater; a back-up member cooperative with said heater to form a nip therebetween with said film therebetween; wherein a recording material is nipped and moved by said nip so that an image is fixed on the recording material; said heater including a base member having first and second longitudinal ends; a resistor extended along a length of said base member, said resistor generating heat upon electric power supply thereto; temperature detecting element for detecting a temperature of said base member; first electric power supply contacts for supplying electric power to said resistor, said first contacts being provided only adjacent said first longitudinal end of said base member; second electric power supply contacts for supplying electric power to said temperature detecting element, said second contacts being provided only adjacent said second longitudinal end of said base member.
Claim 12
Dependent Claim
150 words
An image fixing apparatus, comprising: a heater; a film in slidable contact with said heater; a back-up member cooperative with said heater to form a nip therebetween with said film therebetween; wherein a recording material is nipped and moved by said nip so that an image is fixed on the recording material; said heater including a base member having first and second longitudinal ends; a resistor extended along a length of said base member, said resistor generating heat upon electric power supply thereto; temperature detecting element for detecting a temperature of said base member; first electric power supply contacts for supplying electric power to said resistor, said first contacts being provided only adjacent said first longitudinal end of said base member; second electric power supply contacts for supplying electric power to said temperature detecting element, said second contacts being provided only adjacent said second longitudinal end of said base member.
Claim 13
Dependent Claim
29 words
An apparatus according to claim 10, further comprising control means for controlling electric power supply to said resistor on the basis of an output of said temperature detecting means.
Claim 14
Dependent Claim
31 words
An apparatus according to claim 11, wherein said electric power supply control means controls the electric power supply so that an output of said temperature detecting element is a predetermined level.
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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) | 1999-02-19 | 1999-08-21 | 2000-02-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2003-02-19 | 2003-08-21 | 2004-02-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2007-02-19 | 2007-08-21 | 2008-02-20 | $7700.00 | Window Closed / Lapsed |