Patent US5552874A successfully refreshed from Google Patents.
US5552874A
Expired / Lapsed
US
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Image fixing apparatus
Assignee: Canon Inc
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Filing: 1994-04-28
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Granted: 1996-09-03
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Expires: 2014-04-28
Abstract
Abstract An image fixing apparatus includes a heating member for heating an unfixed image carried on a recording material; a fixing temperature controller for providing a variable fixing temperature of the heating member; wherein when the fixing temperature is lowered, an interval of recording material supply to the heating member is increased.
Inventors
- 👤 Yasumasa Ohtsuka
- 👤 Yohji Tomoyuki
- 👤 Akira Hayakawa
- 👤 Manabu Takano
- 👤 Daizo Fukuzawa
- 👤 Atsuyoshi Abe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 04:30
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/20; G03G15/2003; G03G15/2014; G03G15/2039; G03G15/2042
Claims Analysis
Total Claims: 25
Claim 1
Independent Claim
57 words
An image fixing apparatus comprising: a heating member for heating an unfixed image carried on a recording material; and fixing temperature control means for controlling a temperature of said heating member at a target temperature which is variable; wherein when the target temperature is lowered, an interval of recording material supply to said heating member is increased.
Claim 2
Dependent Claim
57 words
An image fixing apparatus comprising: a heating member for heating an unfixed image carried on a recording material; and fixing temperature control means for controlling a temperature of said heating member at a target temperature which is variable; wherein when the target temperature is lowered, an interval of recording material supply to said heating member is increased.
Claim 3
Dependent Claim
42 words
An apparatus according to claim 1, further comprising a temperature sensor for sensing a temperature of said heating member, wherein said target temperature is determined by said fixing temperature control means on the basis of a temperature detected by said temperature sensor.
Claim 4
Dependent Claim
26 words
An apparatus according to claim 2, wherein the target temperature is determined in accordance with change with time of the detected temperature by said temperature sensor.
Claim 5
Dependent Claim
56 words
An apparatus according to claim 1, further comprising a temperature sensor for detecting a temperature of said heater, wherein a current target temperature is determined on the basis of a comparison between a value on the basis of a sensed temperature of said temperature sensor and a fixing temperature at an end of previous fixing operation.
Claim 6
Dependent Claim
27 words
An apparatus according to claim 1, wherein change of said target temperature is effected while continuous fixing operations are carried out when recording materials are continuously fixed.
Claim 7
Dependent Claim
23 words
An apparatus according to claim 5, wherein when the number of continuous fixing operations reaches a predetermined number, the target temperature is changed.
Claim 8
Dependent Claim
25 words
An apparatus according to claim 5, wherein in a continuous fixing, a plurality of fixing operations are carried out in response to one instruction signal.
Claim 9
Dependent Claim
22 words
An apparatus according to claim 1, wherein the interval is increased when the target temperature is changed to a lowest predetermined temperature.
Claim 10
Dependent Claim
19 words
An apparatus according to claim 1, wherein when a smaller width recording material is fixed, the interval is increased.
Claim 11
Dependent Claim
19 words
An apparatus according to claim 9, wherein the interval is not changed, when large size recording materials are fixed.
Claim 12
Dependent Claim
34 words
An apparatus according to claim 1, further comprising a film in sliding contact with said heater, and a pressing member for forming a nip in cooperation with said heating member with the film therebetween.
Claim 13
Dependent Claim
108 words
An image fixing apparatus comprising: a heating member for fixing an unfixed image on a recording material; and fixing temperature control means for providing a variable fixing temperature of said heating member; wherein said apparatus is capable of effecting its fixing operation on a first size recording material having a width corresponding to a maximum fixable width of said apparatus, and a second size recording material having a width smaller than that of said first size recording material; and wherein when second size recording materials are continuously fixed and continuous fixing operation reach a predetermined number, the fixing temperature is lowered while the recording materials are continuously fixed.
Claim 14
Dependent Claim
108 words
An image fixing apparatus comprising: a heating member for fixing an unfixed image on a recording material; and fixing temperature control means for providing a variable fixing temperature of said heating member; wherein said apparatus is capable of effecting its fixing operation on a first size recording material having a width corresponding to a maximum fixable width of said apparatus, and a second size recording material having a width smaller than that of said first size recording material; and wherein when second size recording materials are continuously fixed and continuous fixing operation reach a predetermined number, the fixing temperature is lowered while the recording materials are continuously fixed.
Claim 15
Dependent Claim
25 words
An apparatus according to claim 12, wherein in a continuous fixing, a plurality of fixing operations are carried out in response to one instruction signal.
Claim 16
Dependent Claim
34 words
An apparatus according to claim 12, further comprising a film in sliding contact with said heater, and a pressing member for forming a nip in cooperation with said heating member with the film therebetween.
Claim 17
Dependent Claim
114 words
An image fixing apparatus comprising: a heating member for fixing an unfixed image on a recording material; fixing temperature control means for providing a variable fixing temperature of said heating member; wherein said apparatus is capable of effecting its fixing operation on a first size recording material having a width corresponding to a maximum fixable width of said apparatus, and a second size recording material having a width smaller than that of said first size recording material; wherein when second size recording materials are continuously fixed, a recording material feeding interval is increased while the recording materials are continuously fixed, whereas the interval is not changed when the first size recording materials are fixed.
Claim 18
Dependent Claim
114 words
An image fixing apparatus comprising: a heating member for fixing an unfixed image on a recording material; fixing temperature control means for providing a variable fixing temperature of said heating member; wherein said apparatus is capable of effecting its fixing operation on a first size recording material having a width corresponding to a maximum fixable width of said apparatus, and a second size recording material having a width smaller than that of said first size recording material; wherein when second size recording materials are continuously fixed, a recording material feeding interval is increased while the recording materials are continuously fixed, whereas the interval is not changed when the first size recording materials are fixed.
Claim 19
Dependent Claim
20 words
An apparatus according to claim 15, wherein number of continuous fixing operations reaches a predetermined number, the interval is changed.
Claim 20
Dependent Claim
25 words
An apparatus according to claim 15, wherein in a continuous fixing, a plurality of fixing operations are carried out in response to one instruction signal.
Claim 21
Dependent Claim
34 words
An apparatus according to claim 15, further comprising a film in sliding contact with said heater, and a pressing member for forming a nip in cooperation with said heating member with the film therebetween.
Claim 22
Dependent Claim
131 words
An image fixing apparatus comprising: a heating member for heating an unfixed image carried on a recording material; and fixing temperature control means for providing a variable fixing temperature of said heating member; wherein said apparatus is capable of effecting its fixing operation on a first size recording material having a width corresponding to a maximum fixable width of said apparatus, and a second size recording material having a width smaller than that of said first size recording material; and wherein when recording materials are continuously fixed, an interval of recording material supply to said heating member and the fixing temperature of said fixing temperature control means are changed while the recording materials are continuously fixed, whereas the interval is not changed when recording materials of the first size are fixed.
Claim 23
Dependent Claim
131 words
An image fixing apparatus comprising: a heating member for heating an unfixed image carried on a recording material; and fixing temperature control means for providing a variable fixing temperature of said heating member; wherein said apparatus is capable of effecting its fixing operation on a first size recording material having a width corresponding to a maximum fixable width of said apparatus, and a second size recording material having a width smaller than that of said first size recording material; and wherein when recording materials are continuously fixed, an interval of recording material supply to said heating member and the fixing temperature of said fixing temperature control means are changed while the recording materials are continuously fixed, whereas the interval is not changed when recording materials of the first size are fixed.
Claim 24
Dependent Claim
25 words
An apparatus according to claim 19, wherein in a continuous fixing, a plurality of fixing operations are carried out in response to one instruction signal.
Claim 25
Dependent Claim
34 words
An apparatus according to claim 19, further comprising a film in sliding contact with said heater, and a pressing member for forming a nip in cooperation with said heating member with the film therebetween.
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| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1999-09-03 | 2000-03-04 | 2000-09-03 | $2000.00 | Window Closed / Lapsed |
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