EP0668548A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Heat fixing apparatus
Assignee: Canon Inc
•
Filing: 1995-02-22
•
Granted: —
•
Expires: 2015-02-22
Abstract
Abstract A heat fixing apparatus includes a heater (2); a temperature sensor (TH) for sensing a temperature of the heater; a bias wave number determining means for determining the number of bias waves corresponding to a predetermined image fixing temperature in accordance with utility voltage source (1) voltage; bias wave number changing means for changing a bias wave number in accordance with temperature changing rate of the heater; and supply wave number control means for controlling the number of waves supplied to the heater in accordance with an output of the temperature sensor (TH) and bias wave number.
Inventors
- 👤 Hidenobu C/O Canon K.K. Suzuki
- 👤 Takashi C/O Canon K.K. Soya
- 👤 Takashi C/O Canon K.K. Nakahara
- 👤 Yasumasa C/O Canon K.K. Nashida
- 👤 Tomoko C/O Canon K.K. Nanbu
- 👤 Hiroshi C/O Canon K.K. Takazawa
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-09 05:10
CPC Classifications
H; H02; H02M; H02M5/00; H02M5/02; H02M5/04; H02M5/22; H02M5/25; H02M5/257; H02M5/2573; H02M5/2576; G; G03; G03G; G03G15/00; G03G15/20; G03G15/2003; G03G15/2014; G03G15/2039; G05; G05D; G05D23/00; G05D23/19; G05D23/1906; G05D23/1913; G03G2215/00; G03G2215/20; G03G2215/2003; G03G2215/2016; G03G2215/2035; G03G2215/2038; H02M1/00; H02M1/0003; H02M1/0006; H02M5/275; H02M5/293; H02M5/2932; H02M5/2937
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
93 words
A heat fixing apparatus comprising: a heater; a temperature sensor for sensing a temperature of said heater; a bias wave number determining means for determining the number of bias waves corresponding to a predetermined image fixing temperature in accordance with utility voltage source voltage; bias wave number changing means for changing a bias wave number in accordance with temperature changing rate of said heater; and supply wave number control means for controlling the number of waves supplied to said heater in accordance with an output of said temperature sensor and bias wave number.
Claim 2
Dependent Claim
93 words
A heat fixing apparatus comprising: a heater; a temperature sensor for sensing a temperature of said heater; a bias wave number determining means for determining the number of bias waves corresponding to a predetermined image fixing temperature in accordance with utility voltage source voltage; bias wave number changing means for changing a bias wave number in accordance with temperature changing rate of said heater; and supply wave number control means for controlling the number of waves supplied to said heater in accordance with an output of said temperature sensor and bias wave number.
Claim 3
Dependent Claim
37 words
An apparatus according to Claim 1, further comprising a film in contact with and movable together with unfixed image, and said heater is in slidable contact with a side of the film not contactable with the toner.
Claim 4
Dependent Claim
56 words
A heat fixing apparatus comprising: a heater; control switch for effecting on-off switching for electric power supply to said heater from a utility voltage source; triggering means for triggering said control switch, said triggering means is effective to change a minimum period of a triggering signal in accordance with a frequency of the utility voltage source.
Claim 5
Dependent Claim
56 words
A heat fixing apparatus comprising: a heater; control switch for effecting on-off switching for electric power supply to said heater from a utility voltage source; triggering means for triggering said control switch, said triggering means is effective to change a minimum period of a triggering signal in accordance with a frequency of the utility voltage source.
Claim 6
Dependent Claim
13 words
An apparatus according to Claim 3, wherein said control switch includes a TRIAC.
Claim 7
Dependent Claim
31 words
Further comprising a film in contact with and movable together with unfixed image, and said heater is in slidable contact with a side of the film not contactable with the toner.
Claim 8
Dependent Claim
31 words
Further comprising a film in contact with and movable together with unfixed image, and said heater is in slidable contact with a side of the film not contactable with the toner.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
Maintenance schedule is calculated for granted US utility patents.