Patent US5204723A successfully refreshed from Google Patents.
US5204723A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heating apparatus having heater with branch
Assignee: Canon Inc
•
Filing: 1991-11-01
•
Granted: 1993-04-20
•
Expires: 2011-11-01
Abstract
Abstract A heating apparatus includes a heater, the heater including a main resistance layer and a subordinate resistance layer branched from said main resistance layer, which extend in a direction crossing with a movement direction of a recording material and which are supplied with electric power; a selector for selecting a resistance layer for supplying electric power; and a controller for controlling an effective voltage applied to said heater in accordance with selected resistance layer.
Inventors
- 👤 Shinji Hanada
- 👤 Hisaaki Senba
- 👤 Koji Masuda
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 06:02
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/20; G03G15/2003; G03G15/2014; G03G15/2039; G03G15/2042
Claims Analysis
Total Claims: 24
Claim 1
Independent Claim
121 words
A heating apparatus, comprising: a heater, said heater including a main resistance layer and a subordinate resistance layer branched from said main resistance layer which extend in a direction crossing with a movement direction of a recording material and which are supplied with electric power; selecting means for selecting a resistance layer to be supplied with electric power in accordance with a size of the recording material, said selecting means selecting the resistance layers so that a number of resistance layers selected is larger in an area where the recording material does not pass than in an area where the recording material passes; and control means for controlling an effective voltage applied to said heater in accordance with selected resistance layer.
Claim 2
Dependent Claim
121 words
A heating apparatus, comprising: a heater, said heater including a main resistance layer and a subordinate resistance layer branched from said main resistance layer which extend in a direction crossing with a movement direction of a recording material and which are supplied with electric power; selecting means for selecting a resistance layer to be supplied with electric power in accordance with a size of the recording material, said selecting means selecting the resistance layers so that a number of resistance layers selected is larger in an area where the recording material does not pass than in an area where the recording material passes; and control means for controlling an effective voltage applied to said heater in accordance with selected resistance layer.
Claim 3
Dependent Claim
31 words
An apparatus according to claim 1, further comprising a film movable together with a recording material having an image, wherein the image is heated by heat from said heat resistance layer.
Claim 4
Dependent Claim
22 words
An apparatus according to claim 2, further comprising a pressing member for pressing said film and the recording material with said heater.
Claim 5
Dependent Claim
26 words
An apparatus according to claim 1, wherein the number in the recording material passing area is one, and the number in the non-passage area is two.
Claim 6
Dependent Claim
23 words
An apparatus according to claim 1, wherein said control means controls a pulse width of the applied voltage to control the effective voltage.
Claim 7
Dependent Claim
21 words
An apparatus according to claim 1, wherein said control means controls a phase of the voltage to control the effective voltage.
Claim 8
Dependent Claim
45 words
An apparatus according to claim 1, wherein said control means effects its control operation so as to provide a constant amount of heat generation by said heater per unit length thereof in the recording material passage region, irrespective of the size of the recording material.
Claim 9
Dependent Claim
23 words
An apparatus according to claim 1, wherein said control means increases the effective voltage with increase of a size of the recording material.
Claim 10
Dependent Claim
129 words
A heating apparatus, comprising: a heater including a main resistance layer and a subordinate resistance layer branched therefrom which extend in a direction perpendicular to a movement direction of a recording material and which are supplied with electric power; selecting means for selecting a resistance layer to be supplied with electric power in accordance with a width of the recording material, said selecting means selecting the resistance layers so that a number of resistance layers selected is larger in an area where the recording material does not pass than in an area where the recording material passes; and control means for controlling the power supply in accordance with selection by said selecting means, wherein said control means decreases the power with decrease of the width of the recording material.
Claim 11
Dependent Claim
129 words
A heating apparatus, comprising: a heater including a main resistance layer and a subordinate resistance layer branched therefrom which extend in a direction perpendicular to a movement direction of a recording material and which are supplied with electric power; selecting means for selecting a resistance layer to be supplied with electric power in accordance with a width of the recording material, said selecting means selecting the resistance layers so that a number of resistance layers selected is larger in an area where the recording material does not pass than in an area where the recording material passes; and control means for controlling the power supply in accordance with selection by said selecting means, wherein said control means decreases the power with decrease of the width of the recording material.
Claim 12
Dependent Claim
31 words
An apparatus according to claim 9, further comprising a film movable together with a recording material having an image, wherein the image is heated by heat from said heat resistance layer.
Claim 13
Dependent Claim
22 words
An apparatus according to claim 9, further comprising a pressing member for pressing said film and the recording material with said heater.
Claim 14
Dependent Claim
23 words
An apparatus according to claim 9, wherein said control means effects its control operation by changing a pulse width of the power supply.
Claim 15
Dependent Claim
22 words
An apparatus according to claim 9, wherein said control means effects its control operation by controlling a phase of the power supply.
Claim 16
Dependent Claim
43 words
An apparatus according to claim 9, wherein said control means effects its control operation so that an amount of heat generation per unit length of said heater in the recording material passage area is constant irrespective of the size of the recording material.
Claim 17
Dependent Claim
120 words
A heating apparatus, comprising: a heater including a main resistance layer and a subordinate resistance layer branched from said main resistance layer which extend in a direction perpendicular to a movement direction of a recording material and which are supplied with electric power; selecting means for selecting a resistance layer to be supplied with the electric power in accordance with a size of the recording material, said selecting means selecting the resistance layers so that a number of resistance layers selected is larger in an area where the recording material does not pass than in an area where the recording material passes; and control means for controlling power supply period per unit time in accordance with the resistance layer selected.
Claim 18
Dependent Claim
120 words
A heating apparatus, comprising: a heater including a main resistance layer and a subordinate resistance layer branched from said main resistance layer which extend in a direction perpendicular to a movement direction of a recording material and which are supplied with electric power; selecting means for selecting a resistance layer to be supplied with the electric power in accordance with a size of the recording material, said selecting means selecting the resistance layers so that a number of resistance layers selected is larger in an area where the recording material does not pass than in an area where the recording material passes; and control means for controlling power supply period per unit time in accordance with the resistance layer selected.
Claim 19
Dependent Claim
31 words
An apparatus according to claim 15, further comprising a film movable together with a recording material having an image, and the image is heated by heat from said heat resistance layer.
Claim 20
Dependent Claim
22 words
An apparatus according to claim 16, further comprising a pressing member for pressing said film and the recording material with said heater.
Claim 21
Dependent Claim
23 words
An apparatus according to claim 15, wherein said control means effects is control operation by controlling a pulse width of the power supply.
Claim 22
Dependent Claim
23 words
An apparatus according to claim 15, wherein said control means effects its control operation by changing a phase of the electric power supply.
Claim 23
Dependent Claim
43 words
An apparatus according to claim 19, wherein said control means effects its control operation so that an amount of heat generation per unit length of said heater in the recording material passage area is constant irrespective of the size of the recording material.
Claim 24
Dependent Claim
23 words
An apparatus according to claim 19, wherein said control means increases the power supply period with increase of the recording material passage area.
References Cited (Backward Citations)
US1093968A
Cited
US3832524A
Cited
US3934112A
Cited
US4075455A
Cited
JPS60104348A
Cited
US4628183A
Cited
JPS6184260A
Cited
JPS61137759A
Cited
US4801968A
Cited
US4883941A
Cited
US5045891A
Cited
US5051784A
Cited
JPH03114756A
Cited
JPH03144477A
Cited
JPH03194879A
Cited
US5162635A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1996-04-19 | 1996-10-19 | 1997-04-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-04-19 | 2000-10-19 | 2001-04-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-04-19 | 2004-10-19 | 2005-04-20 | $7700.00 | Window Closed / Lapsed |