US6630651B2
Expired / Lapsed
US
⏱️ 0.0 years remaining
Induction heating device with a switching power source and image processing apparatus using the same
Assignee: Ricoh Co Ltd
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Filing: 2000-12-22
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Granted: 2003-10-07
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Expires: 2020-12-22
Abstract
Abstract An induction heating device includes a plurality of induction coils connected to a single high-frequency power source and each being able to be ON/OFF controlled by a switch. A current is selectively fed only to desired part of the induction coils or to all of the induction coils connected in parallel. The coils are driven by a current fed thereto at the same time in the same phase. The device may include inverters for controlling power to be fed coil by coil. The device is free from interference and irregular heating and can readily cope with a change in a heating range while controlling power coil by coil.
Inventors
- 👤 Hiroto Ohishi
- 👤 Masae Sugawara
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 04:05
CPC Classifications
H; H05; H05B; H05B6/00; H05B6/02; H05B6/06; H05B6/08; H05B6/04
Claims Analysis
Total Claims: 52
Claim 1
Independent Claim
100 words
In an induction heating device comprising a plurality of induction coils for heating a same heating member by induction, each of said plurality of induction coils is connected to a single high-frequency power source device in parallel through a respective switch, each respective switch controlling a supply of current to only one respective induction coil, said high-frequency power source device controlling a current for each induction coil and, wherein when each respective switch is open an alternating current is fed from the high-frequency power source to the plurality of induction coils at a same time and at a same phase.
Claim 2
Dependent Claim
100 words
In an induction heating device comprising a plurality of induction coils for heating a same heating member by induction, each of said plurality of induction coils is connected to a single high-frequency power source device in parallel through a respective switch, each respective switch controlling a supply of current to only one respective induction coil, said high-frequency power source device controlling a current for each induction coil and, wherein when each respective switch is open an alternating current is fed from the high-frequency power source to the plurality of induction coils at a same time and at a same phase.
Claim 3
Dependent Claim
28 words
An induction heating device as claimed in claim 1 , wherein a particular inverter including control means for controlling an output current is assigned to each induction coil.
Claim 4
Dependent Claim
59 words
An induction heating device as claimed in claim 2 , wherein temperature sensing means is provided for sensing a temperature of a portion of said heating member corresponding in position to any one of said induction coils, control means controlling the output current via said inverter circuit on the basis of the temperature sensed by said temperature sensing means.
Claim 5
Dependent Claim
20 words
An induction heating device as claimed in claim 3 , wherein capacitors are connected to said induction coils in parallel.
Claim 6
Dependent Claim
26 words
An induction heating device as claimed in claim 4 , wherein said induction coils each are made up of split portions arranged on said heating member.
Claim 7
Dependent Claim
23 words
An induction heating device as claimed in claim 5 , wherein said induction coils each comprise a group of coils connected in parallel.
Claim 8
Dependent Claim
19 words
An induction heating device as claimed in claim 6 , wherein said heating member has a hollow, cylindrical configuration.
Claim 9
Dependent Claim
19 words
An induction heating device as claimed in claim 7 , wherein the induction coils each comprise a Litz wire.
Claim 10
Dependent Claim
20 words
An induction heating device as claimed in claim 1 , wherein capacitors are connected to said induction coils in parallel.
Claim 11
Dependent Claim
26 words
An induction heating device as claimed in claim 9 , wherein said induction coils each are made up of split portions arranged on said heating member.
Claim 12
Dependent Claim
23 words
An induction heating device as claimed in claim 10 , wherein said induction coils each comprise a group of coils connected in parallel.
Claim 13
Dependent Claim
19 words
An induction heating device as claimed in claim 11 , wherein said heating member has a hollow, cylindrical configuration.
Claim 14
Dependent Claim
19 words
An induction heating device as claimed in claim 12 , wherein the induction coils each comprise a Litz wire.
Claim 15
Dependent Claim
26 words
An induction heating device as claimed in claim 1 , wherein said induction coils each are made up of split portions arranged on said heating member.
Claim 16
Dependent Claim
23 words
An induction heating device as claimed in claim 14 , wherein said induction coils each comprise a group of coils connected in parallel.
Claim 17
Dependent Claim
19 words
An induction heating device as claimed in claim 15 , wherein said heating member has a hollow, cylindrical configuration.
Claim 18
Dependent Claim
19 words
An induction heating device as claimed in claim 16 , wherein the induction coils each comprise a Litz wire.
Claim 19
Dependent Claim
23 words
An induction heating device as claimed in claim 1 , wherein said induction coils each comprise a group of coils connected in parallel.
Claim 20
Dependent Claim
19 words
An induction heating device as claimed in claim 18 , wherein said heating member has a hollow, cylindrical configuration.
Claim 21
Dependent Claim
19 words
An induction heating device as claimed in claim 19 , wherein the induction coils each comprise a Litz wire.
Claim 22
Dependent Claim
19 words
An induction heating device as claimed in claim 1 , wherein said heating member has a hollow, cylindrical configuration.
Claim 23
Dependent Claim
19 words
An induction heating device as claimed in claim 21 , wherein the induction coils each comprise a Litz wire.
Claim 24
Dependent Claim
19 words
An induction heating device as claimed in claim 1 , wherein the induction coils each comprise a Litz wire.
Claim 25
Dependent Claim
106 words
In an induction heating device comprising a plurality of induction coils for heating a same heating member by induction, each of said plurality of induction coils is connected to a single high-frequency power source device in series through a respective switch, each respective switch controlling a supply of current to only one respective induction, said high-frequency power source device controlling a current to be fed to part of said plurality of induction coils, and wherein when each respective switch is open an alternating current is fed from the high-frequency power source to the plurality of induction coils at a same time and at a same phase.
Claim 26
Dependent Claim
106 words
In an induction heating device comprising a plurality of induction coils for heating a same heating member by induction, each of said plurality of induction coils is connected to a single high-frequency power source device in series through a respective switch, each respective switch controlling a supply of current to only one respective induction, said high-frequency power source device controlling a current to be fed to part of said plurality of induction coils, and wherein when each respective switch is open an alternating current is fed from the high-frequency power source to the plurality of induction coils at a same time and at a same phase.
Claim 27
Dependent Claim
43 words
An induction heating device as claimed in claim 24 , wherein an inverter circuit including control means for controlling an output current is assigned to each of the part of said plurality of induction coils and all of said plurality of induction coils.
Claim 28
Dependent Claim
59 words
An induction heating device as claimed in claim 25 , wherein temperature sensing mean is provided for sensing a temperature of a portion of said heating member corresponding in position to any one of said induction coils, control means controlling the output current via said inverter circuit on the basis of the temperature sensed by said temperature sensing means.
Claim 29
Dependent Claim
28 words
An induction heating device as claimed in claim 26 , wherein capacitors are connected to part of said induction coils and all of said induction coils in series.
Claim 30
Dependent Claim
26 words
An induction heating device as claimed in claim 27 , wherein said induction coils each are made up of split portions arranged on said heating member.
Claim 31
Dependent Claim
23 words
An induction heating device as claimed in claim 28 , wherein said induction coils each comprise a group of coils connected in series.
Claim 32
Dependent Claim
19 words
An induction heating device as claimed in claim 29 , wherein said heating member has a hollow, cylindrical configuration.
Claim 33
Dependent Claim
19 words
An induction heating device as claimed in claim 30 , wherein said induction coils each comprise a Litz wire.
Claim 34
Dependent Claim
28 words
An induction heating device as claimed in claim 24 , wherein capacitors are connected to part of said induction coils and all of said induction coils in series.
Claim 35
Dependent Claim
26 words
An induction heating device as claimed in claim 32 , wherein said induction coils each are made up of split portions arranged on said heating member.
Claim 36
Dependent Claim
23 words
An induction heating device as claimed in claim 33 , wherein said induction coils each comprise a group of coils connected in series.
Claim 37
Dependent Claim
19 words
An induction heating device as claimed in claim 34 , wherein said heating member has a hollow, cylindrical configuration.
Claim 38
Dependent Claim
19 words
An induction heating device as claimed in claim 35 , wherein said induction coils each comprise a Litz wire.
Claim 39
Dependent Claim
26 words
An induction heating device as claimed in claim 24 , wherein said induction coils each are made up of split portions arranged on said heating member.
Claim 40
Dependent Claim
23 words
An induction heating device as claimed in claim 37 , wherein said induction coils each comprise a group of coils connected in series.
Claim 41
Dependent Claim
19 words
An induction heating device as claimed in claim 38 , wherein said heating member has a hollow, cylindrical configuration.
Claim 42
Dependent Claim
19 words
An induction heating device as claimed in claim 39 , wherein said induction coils each comprise a Litz wire.
Claim 43
Dependent Claim
23 words
An induction heating device as claimed in claim 24 , wherein said induction coils each comprise a group of coils connected in series.
Claim 44
Dependent Claim
19 words
An induction heating device as claimed in claim 41 , wherein said heating member has a hollow, cylindrical configuration.
Claim 45
Dependent Claim
19 words
An induction heating device as claimed in claim 42 , wherein said induction coils each comprise a Litz wire.
Claim 46
Dependent Claim
19 words
An induction heating device as claimed in claim 24 , wherein said heating member has a hollow, cylindrical configuration.
Claim 47
Dependent Claim
19 words
An induction heating device as claimed in claim 44 , wherein said induction coils each comprise a Litz wire.
Claim 48
Dependent Claim
19 words
An induction heating device as claimed in claim 24 , wherein said induction coils each comprise a Litz wire.
Claim 49
Dependent Claim
114 words
In an image processing apparatus using an induction heating device, which includes a plurality of induction coils for heating a same heating member by induction, as fixing means for fixing an image with heat, each of said plurality of induction coils is connected to a single high-frequency power source device in parallel through a respective switch, each respective switch controlling a supply of current to only one respective induction, said high-frequency power source device controlling a current for each induction coil, and wherein when each respective switch is open an alternating current is fed from the high-frequency power source to the plurality of induction coils at a same time and at a same phase.
Claim 50
Dependent Claim
114 words
In an image processing apparatus using an induction heating device, which includes a plurality of induction coils for heating a same heating member by induction, as fixing means for fixing an image with heat, each of said plurality of induction coils is connected to a single high-frequency power source device in parallel through a respective switch, each respective switch controlling a supply of current to only one respective induction, said high-frequency power source device controlling a current for each induction coil, and wherein when each respective switch is open an alternating current is fed from the high-frequency power source to the plurality of induction coils at a same time and at a same phase.
Claim 51
Dependent Claim
121 words
In an image processing apparatus using an induction heating device, which includes a plurality of induction coils for heating a same heating member by induction, as fixing means for fixing an image with heat, each of said plurality of induction coils is connected to a single high-frequency power source device in series through a respective switch, each respective switch controlling a supply of current to only one respective induction, said high-frequency power source device controlling a current to be fed to part of said plurality of induction coils, and wherein when each respective switch is open an alternating current is fed from the high-frequency power source to the plurality of induction coils at a same time and at a same phase.
Claim 52
Dependent Claim
121 words
In an image processing apparatus using an induction heating device, which includes a plurality of induction coils for heating a same heating member by induction, as fixing means for fixing an image with heat, each of said plurality of induction coils is connected to a single high-frequency power source device in series through a respective switch, each respective switch controlling a supply of current to only one respective induction, said high-frequency power source device controlling a current to be fed to part of said plurality of induction coils, and wherein when each respective switch is open an alternating current is fed from the high-frequency power source to the plurality of induction coils at a same time and at a same phase.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2006-10-06 | 2007-04-07 | 2007-10-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2010-10-06 | 2011-04-07 | 2011-10-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2014-10-06 | 2015-04-07 | 2015-10-07 | $7700.00 | Window Closed / Lapsed |