EP0390168A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
An image fixing apparatus
Assignee: Canon Inc
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Filing: 1990-03-29
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Granted: —
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Expires: 2010-03-29
Abstract
Abstract An image fixing apparatus includes a heater (23); a film (25) movable together with a recording material (P) having a visualized image which is heated by the heater(23) through the film (25); a temperature detecting element (24) for detecting a temperature of the heater (23); control system for controlling power supply to the heater (23) so as to provide a constant output of the temperature detecting element (24) during fixing operation; wherein the control system controls the power supply to the heater (23) in accordance with an output of the temperature detecting element (24) from start of power supply to the heater (23) to the temperature of the heater reaching a predetermined temperature.
Inventors
- 👤 Shokyo Koh
- 👤 Yoshihiko Suzuki
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-09 05:08
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/20; G03G15/2003; G03G15/2014; G03G15/2039
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
101 words
An image fixing apparatus, comprising: a heater; a film movable together with a recording material having a visualized image which is heated by said heater through said film; temperature detecting means for detecting a temperature of said heater; control means for controlling power supply to said heater so as to provide a constant output of said temperature detecting means during fixing operation; wherein said control means controls the power supply to said heater in accordance with an output of said temperature detecting means from start of power supply to said heater to the temperature of said heater reaching a predetermined temperature.
Claim 2
Dependent Claim
101 words
An image fixing apparatus, comprising: a heater; a film movable together with a recording material having a visualized image which is heated by said heater through said film; temperature detecting means for detecting a temperature of said heater; control means for controlling power supply to said heater so as to provide a constant output of said temperature detecting means during fixing operation; wherein said control means controls the power supply to said heater in accordance with an output of said temperature detecting means from start of power supply to said heater to the temperature of said heater reaching a predetermined temperature.
Claim 3
Dependent Claim
25 words
An apparatus according to Claim 1, wherein said control means decreases the power supply to said heater in accordance with temperature rise of said heater.
Claim 4
Dependent Claim
15 words
An apparatus according to Claim 1, wherein said control means stepwisely changes the power supply.
Claim 5
Dependent Claim
14 words
An apparatus according to Claim 1, wherein said heater has a high thermal conductivity.
Claim 6
Dependent Claim
49 words
An apparatus according to Claim 1, wherein said heater includes a heat generating resistance layer for generating heat by electric power supply and a base plate of high thermal conductivity for supporting said heat generating resistance layer, wherein said temperature detecting means detects a temperature of said base plate.
Claim 7
Dependent Claim
15 words
An apparatus according to Claim 1, wherein said heater is pulsewisely supplied with the power.
Claim 8
Dependent Claim
23 words
An apparatus according to Claim 1, wherein said heater is stationary during the fixing operation, and wherein said film slides on said heater.
Claim 9
Dependent Claim
18 words
An apparatus according to Claim 1, wherein said film has a thickness of not more than 100 microns.
Claim 10
Dependent Claim
54 words
An apparatus according to Claim 1, wherein said fixing apparatus is used with an image forming apparatus provided with an image forming means for forming a visualized image on the recording material, wherein the power supply to said heater is started after an image formation start signal is generated in said image forming apparatus.
Claim 11
Dependent Claim
21 words
An apparatus according to Claim 1, wherein the predetermined temperature is a fixing temperature which is maintained during the fixing operation.
References Cited (Backward Citations)
No citation records indexed.
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