Patent US6040558A successfully refreshed from Google Patents.
EP0797130A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Image heating apparatus
Assignee: Canon Inc
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Filing: 1997-03-20
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Granted: —
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Expires: 2017-03-20
Abstract
Abstract The present invention provides an image heating apparatus comprising a heating member (600) having a first heating resistor (610) and a second heating resistor (620), a temperature detecting element (640,641,642) for detecting a temperature of the heating member, and a power supply control means (100,51,52) for controlling power supply (30) to the first and second heating resistors so that detected temperature of the temperature detecting element (640,641,642) is maintained a set temperature. The power supply control means (100,51,52) sends the power supply (30) to the first heating resistor (610) in a first power supply pattern, and sends the power supply to the second heating resistor (620) in a second power supply pattern different from the first power supply pattern.
Inventors
- 👤 Hideki Suzuki
- 👤 Kenjiro Hori
- 👤 Michihito Yamazaki
- 👤 Koichi Okuda
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-09 06:01
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/20; G03G15/2003; G03G15/2014; G03G15/2053; G03G15/2039; G03G2215/00; G03G2215/20; G03G2215/2003; G03G2215/2016; G03G2215/2035
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
105 words
An image heating apparatus comprising: a heating member having a first heating resistor and a second heating resistor; a temperature detecting element for detecting a temperature of said heating member; and a power supply control means for controlling power supply to said first and second heating resistors so that detected temperature of said temperature detecting element is maintained a set temperature; wherein said power supply control means sends the power supply to said first heating resistor in a first power supply pattern, and sends the power supply to said second heating resistor in a second power supply pattern different from the first power supply pattern.
Claim 2
Dependent Claim
41 words
An image heating apparatus according to claim 1, wherein said heating member further includes a third heating resistor to which said power supply control means sends the power supply in the same power supply pattern as the first power supply pattern.
Claim 3
Dependent Claim
44 words
An image heating apparatus according to claim 1, wherein said heating member further includes a third heating resistor to which said power supply control means sends the power supply in a third power supply pattern different from the first and second power supply patterns.
Claim 4
Dependent Claim
27 words
An image heating apparatus according to claim 1, wherein said first heating resistor has a resistance value same as a resistance value of said second heating resistor.
Claim 5
Dependent Claim
27 words
An image heating apparatus according to claim 1, wherein said first heating resistor has a resistance value different from a resistance value of said second heating resistor.
Claim 6
Dependent Claim
32 words
An image heating apparatus according to claim 1, wherein said power supply control means always controls said first heating resistor under phase-control always controls said second heating resistor under ON-control or OFF-control.
Claim 7
Dependent Claim
33 words
An image heating apparatus according to claim 1, wherein said power supply control means exchanges input voltage wave-forms to said first and second heating resistors in every predetermined cycles of an AC wave-form.
Claim 8
Dependent Claim
35 words
An image heating apparatus according to claim 1, wherein said power supply control means always controls said first heating resistor under wave number control and always controls said second heating resistor under ON-control or OFF-control.
Claim 9
Dependent Claim
31 words
An image heating apparatus according to claim 1, wherein said power supply control means controls said first heating resistor under phase-control and controls said second heating resistor under wave number control.
Claim 10
Dependent Claim
29 words
An image heating apparatus according to claim 9, wherein said power supply control means controls said first heating resistor under phase-control in every predetermined cycles of an AC wave-form.
Claim 11
Dependent Claim
40 words
An image heating apparatus according to claim 1, further comprising a film shifting while slidingly contacting with said heating member, and a back-up member cooperating with said heating member to form a nip therebetween with the interposition of said film.
References Cited (Backward Citations)
No citation records indexed.
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