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US6336027B1
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Induction heating fusing device
Assignee: Minolta Co Ltd
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Filing: 2000-09-26
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Granted: 2002-01-01
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Expires: 2020-09-26
Abstract
Abstract An induction heating fusing device has a core that forms a magnetic circuit, an inductive coil wrapped around the core and a roller as a conductive member. A diameter of a wire for the inductive coil varies from the center to the ends of the length of the roller. Consequently, the number of turns in the coil varies from the center to the ends of the length of the roller, ensuring a uniform temperature distribution throughout the length of the roller.
Inventors
- 👤 Katsuhide Sakai
- 👤 Takahiro Tsujimoto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 04:33
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/20; G03G15/2003; G03G15/2014; G03G15/2053; H; H05; H05B; H05B6/00; H05B6/02; H05B6/10; H05B6/14; H05B6/145
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
77 words
An induction heating fusing device comprising: a core which forms a magnetic circuit; an inductive coil which has at least one lead wire and is located around said core; and an endless conductive member which is arranged along said core, wherein a diameter of said at least one lead wire at a center of a length of said core is different from a diameter of said at least one lead wire at one end of said core.
Claim 2
Dependent Claim
77 words
An induction heating fusing device comprising: a core which forms a magnetic circuit; an inductive coil which has at least one lead wire and is located around said core; and an endless conductive member which is arranged along said core, wherein a diameter of said at least one lead wire at a center of a length of said core is different from a diameter of said at least one lead wire at one end of said core.
Claim 3
Dependent Claim
40 words
An induction heating fusing device as claimed in claim 1 , wherein the diameter of said at least one lead wire is larger at the center of the length of the core than at the one end of the core.
Claim 4
Dependent Claim
53 words
An induction heating fusing device as claimed in claim 2 , wherein a number of turns of said at least one lead wire at the center of the length of the core is smaller than a number of turns of said at least one lead wire at the one end of the core.
Claim 5
Dependent Claim
40 words
An induction heating fusing device as claimed in claim 1 , wherein the diameter of said at least one lead wire is smaller at the center of the length of the core than at the one end of the core.
Claim 6
Dependent Claim
52 words
An induction heating fusing device as claimed in claim 4 , wherein a number of turns of said at least one lead wire at the center of the length of the core is larger than a number of turns of at least one lead wire at the one end of the core.
Claim 7
Dependent Claim
70 words
An induction heating fusing device comprising: a core which forms a magnetic circuit; a first inductive coil which has a first lead wire and is located around said core; a second inductive coil which is located around said core and has a second lead wire of which a diameter is different from a diameter of said first lead wire and; and a conductive member which is arranged along said core.
Claim 8
Dependent Claim
70 words
An induction heating fusing device comprising: a core which forms a magnetic circuit; a first inductive coil which has a first lead wire and is located around said core; a second inductive coil which is located around said core and has a second lead wire of which a diameter is different from a diameter of said first lead wire and; and a conductive member which is arranged along said core.
Claim 9
Dependent Claim
39 words
An induction heating fusing device as claimed in claim 6 , wherein said first coil is positioned at a center of a length of said core, and said second coil is positioned at a one end of said core.
Claim 10
Dependent Claim
29 words
An induction heating fusing device as claimed in claim 7 , wherein the diameter of said first lead wire is larger than the diameter of said second lead wire.
Claim 11
Dependent Claim
29 words
An induction heating fusing device as claimed in claim 7 , wherein the diameter of said first lead wire is smaller than the diameter of said second lead wire.
Claim 12
Dependent Claim
31 words
An induction heating fusing device as claimed in claim 7 , wherein a number of turns of said first coil is different from a number of turns of said second coil.
Claim 13
Dependent Claim
31 words
An induction heating fusing device as claimed in claim 10 , wherein the number of turns of said first coil is smaller than the number of turns of said second coil.
Claim 14
Dependent Claim
31 words
An induction heating fusing device as claimed in claim 10 , wherein the number of turns of said first coil is larger than the number of turns of said second coil.
References Cited (Backward Citations)
JPS5933788A
Cited
JPH07287471A
Cited
JPH08179647A
Cited
JPH09305043A
Cited
JPH09306653A
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US6069347A
Cited
JPH1115304A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2004-12-31 | 2005-07-02 | 2006-01-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2008-12-31 | 2009-07-02 | 2010-01-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2012-12-31 | 2013-07-02 | 2014-01-01 | $7700.00 | Window Closed / Lapsed |