US5768673A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Induction heat fusing device and a fusing roller used in an induction heat sufing device
Assignee: Minolta Co Ltd
•
Filing: 1996-10-25
•
Granted: 1998-06-16
•
Expires: 2016-10-25
Abstract
Abstract An induction heat fusing device comprises a fusing roller and an induction coil induces an induction current in the fusing roller. The fusing roller has a nonmagnetic metallic hollow roller with good heat conduction properties and a magnetic metal layer formed on the outer peripheral surface of said roller that is heated by means of an induction current induced by the induction coil.
Inventors
- 👤 Yuusuke Morigami
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 06:17
CPC Classifications
H; H05; H05B; H05B6/00; H05B6/02; H05B6/10; H05B6/14; H05B6/145; G; G03; G03G; G03G15/00; G03G15/20; G03G15/2003; G03G15/2014; G03G15/2053
Claims Analysis
Total Claims: 65
Claim 1
Independent Claim
85 words
An induction heat fusing device comprising: a fusing member comprising a nonmagnetic metallic base, comprised of a material with a specific magnetic permeability of about 1 and a heat conduction rate of 200 (W/m·k) or more at 200° C. said nonmagnetic metallic base having good heat conduction properties and, said nonmagnetic metallic base including a magnetic metal layer formed on said base; and an induction coil arranged close to said fusing member that induces an induction current in said magnetic metal layer to generate heat.
Claim 2
Dependent Claim
85 words
An induction heat fusing device comprising: a fusing member comprising a nonmagnetic metallic base, comprised of a material with a specific magnetic permeability of about 1 and a heat conduction rate of 200 (W/m·k) or more at 200° C. said nonmagnetic metallic base having good heat conduction properties and, said nonmagnetic metallic base including a magnetic metal layer formed on said base; and an induction coil arranged close to said fusing member that induces an induction current in said magnetic metal layer to generate heat.
Claim 3
Dependent Claim
22 words
The induction heat fusing device as claimed in claim 1 wherein said nonmagnetic metallic base is formed from a material including aluminum.
Claim 4
Dependent Claim
22 words
The induction heat fusing device as claimed in claim 1 wherein said nonmagnetic metallic base is formed from a material including silver.
Claim 5
Dependent Claim
22 words
The induction heat fusing device as claimed in claim 1 wherein said nonmagnetic metallic base is formed from a material including copper.
Claim 6
Dependent Claim
27 words
The induction heat fusing device as claimed in claim 1 wherein said fusing member further has a heat resistant separation layer formed on said magnetic matal layer.
Claim 7
Dependent Claim
19 words
The induction heat fusing device as claimed in claim 1 wherein said fusing member is an endless rotating member.
Claim 8
Dependent Claim
17 words
The induction heat fusing device as claimed in claim 6 wherein said fusing member is a roller.
Claim 9
Dependent Claim
69 words
An induction heat fusing device comprising: a fusing member comprising a nonmagnetic metallic base with good heat conduction properties and a magnetic metal layer formed on said base, said magnetic metal layer comprised of a material with a specific magnetic permeability of about 100 or more; and an induction coil arranged close to said fusing member that induces an induction current in said magnetic metal layer to generate heat.
Claim 10
Dependent Claim
69 words
An induction heat fusing device comprising: a fusing member comprising a nonmagnetic metallic base with good heat conduction properties and a magnetic metal layer formed on said base, said magnetic metal layer comprised of a material with a specific magnetic permeability of about 100 or more; and an induction coil arranged close to said fusing member that induces an induction current in said magnetic metal layer to generate heat.
Claim 11
Dependent Claim
19 words
The induction heat fusing device as claimed in claim 8 wherein said magnetic metal layer is formed from SUS430.
Claim 12
Dependent Claim
19 words
The induction heat fusing device as claimed in claim 8 wherein said magnetic metal layer is formed from cobalt.
Claim 13
Dependent Claim
19 words
The induction heat fusing device as claimed in claim 8 wherein said magnetic metal layer is formed from nickel.
Claim 14
Dependent Claim
19 words
The induction heat fusing device as claimed in claim 8 wherein said magnetic metal layer is formed from iron.
Claim 15
Dependent Claim
21 words
The induction heat fusing device as claimed in claim 8 wherein said magnetic metal layer is formed from a nickel-iron alloy.
Claim 16
Dependent Claim
51 words
An induction heat fusing device comprising: an endless rotating member including a nonmagnetic metallic base with good heat conduction properties and a magnetic metal layer formed on said base; and an induction coil arranged inside said rotating member that induces an induction current in said magnetic metal layer to generate heat.
Claim 17
Dependent Claim
51 words
An induction heat fusing device comprising: an endless rotating member including a nonmagnetic metallic base with good heat conduction properties and a magnetic metal layer formed on said base; and an induction coil arranged inside said rotating member that induces an induction current in said magnetic metal layer to generate heat.
Claim 18
Dependent Claim
41 words
The induction heat fusing device as claimed in claim 14 wherein said nonmagnetic metallic base is comprised by a material with a specific magnetic permeability of about 1 and a heat conduction rate of 200 (W/m·k) or more at 200° C.
Claim 19
Dependent Claim
30 words
The induction heat fusing device as claimed in claim 14 wherein said magnetic metal layer is comprised by a material with a specific magnetic permeability of about 100 or more.
Claim 20
Dependent Claim
27 words
The induction heat fusing device as claimed in claim 14 wherein said fusing member further comprises a heat resistant separation layer formed on said magnetic matal layer.
Claim 21
Dependent Claim
20 words
The induction heat fusing device as claimed in claim 14, wherein said magnetic layer is formed directly on said base.
Claim 22
Dependent Claim
62 words
An induction heat fusing device comprising: a fusing member including a base member with electrically insulating and nonmagnetic properties, a heat conduction layer formed on said base member, and a magnetic metal layer formed on said heat conduction layer; and an induction coil arranged close to said fusing member that induces an induction current in said magnetic metal layer to generate heat.
Claim 23
Dependent Claim
62 words
An induction heat fusing device comprising: a fusing member including a base member with electrically insulating and nonmagnetic properties, a heat conduction layer formed on said base member, and a magnetic metal layer formed on said heat conduction layer; and an induction coil arranged close to said fusing member that induces an induction current in said magnetic metal layer to generate heat.
Claim 24
Dependent Claim
27 words
The induction heat fusing device as claimed in claim 19 wherein said base member is comprised of a material with a specific magnetic permeability of about 1.
Claim 25
Dependent Claim
18 words
The induction heat fusing device as claimed in claim 20 wherein said base member is formed from glass.
Claim 26
Dependent Claim
19 words
The induction heat fusing device as claimed in claim 20 wherein said base member is formed from insulated ceramic.
Claim 27
Dependent Claim
30 words
The induction heat fusing device as claimed in claim 19 wherein said magnetic metal layer is comprised of a material with a specific magnetic permeability of about 100 or more.
Claim 28
Dependent Claim
19 words
The induction heat fusing device as claimed in claim 23 wherein said magnetic metal layer is formed from SUS430.
Claim 29
Dependent Claim
19 words
The induction heat fusing device as claimed in claim 23 wherein said magnetic metal layer is formed from cobalt.
Claim 30
Dependent Claim
19 words
The induction heat fusing device as claimed in claim 23 wherein said magnetic metal layer is formed from nickel.
Claim 31
Dependent Claim
19 words
The induction heat fusing device as claimed in claim 23 wherein said magnetic metal layer is formed from iron.
Claim 32
Dependent Claim
21 words
The induction heat fusing device as claimed in claim 23 wherein said magnetic metal layer is formed from a nickel-iron alloy.
Claim 33
Dependent Claim
27 words
The induction heat fusing device as claimed in claim 19 wherein said fusing member further includes a heat resistant separation layer formed on said magnetic metal layer.
Claim 34
Dependent Claim
21 words
The induction heat fusing device of claim 19, wherein said magnetic metal layer is formed directly on said heat conduction layer.
Claim 35
Dependent Claim
82 words
A fusing roller for an induction heat fusing device comprising: a nonmagnetic metallic hollow roller, comprised of a material with a specific magnetic permeability of about 1 and a heat conduction rate of 200 (W/m·k) or more at 200° C., said metallic hollow roller having good heat conduction properties; and a magnetic metal layer formed on the outer peripheral surface of said nonmagnetic metallic hollow roller that is heated by means of an induction current induced by means of an induction coil.
Claim 36
Dependent Claim
82 words
A fusing roller for an induction heat fusing device comprising: a nonmagnetic metallic hollow roller, comprised of a material with a specific magnetic permeability of about 1 and a heat conduction rate of 200 (W/m·k) or more at 200° C., said metallic hollow roller having good heat conduction properties; and a magnetic metal layer formed on the outer peripheral surface of said nonmagnetic metallic hollow roller that is heated by means of an induction current induced by means of an induction coil.
Claim 37
Dependent Claim
19 words
The fusing roller as claimed in claim 31 wherein said hollow roller is formed from a material including aluminum.
Claim 38
Dependent Claim
19 words
The fusing roller as claimed in claim 31 wherein said hollow roller is formed from a material including silver.
Claim 39
Dependent Claim
19 words
The fusing roller as claimed in claim 31 wherein said hollow roller is formed from a material including copper.
Claim 40
Dependent Claim
41 words
A fusing roller for an inductoin heat fusing device comprising: a nonmagnetic metallic hollow roller with electrorically insulating and nonmagnetic properties; a heat conduction layer formed on said base member; and a magnetic metal layer formed on said heat conduction layer.
Claim 41
Dependent Claim
41 words
A fusing roller for an inductoin heat fusing device comprising: a nonmagnetic metallic hollow roller with electrorically insulating and nonmagnetic properties; a heat conduction layer formed on said base member; and a magnetic metal layer formed on said heat conduction layer.
Claim 42
Dependent Claim
71 words
A fusing roller for an induction heat fusing device comprising: a non-magnetic metallic hollow roller with good heat conduction properties; and a magnetic metal layer formed on the outer peripheral surface of said non-magnetic metallic hollow roller that is heated by means of an induction current induced by means of an induction coil, said magnetic metal layer comprised of a material with a specific magnetic permeability of about 100 or more.
Claim 43
Dependent Claim
71 words
A fusing roller for an induction heat fusing device comprising: a non-magnetic metallic hollow roller with good heat conduction properties; and a magnetic metal layer formed on the outer peripheral surface of said non-magnetic metallic hollow roller that is heated by means of an induction current induced by means of an induction coil, said magnetic metal layer comprised of a material with a specific magnetic permeability of about 100 or more.
Claim 44
Dependent Claim
17 words
The fusing roller as claimed in claim 36 wherein said magnetic metal layer is formed from SUS430.
Claim 45
Dependent Claim
17 words
The fusing roller as claimed in claim 36 wherein said magnetic metal layer is formed from cobalt.
Claim 46
Dependent Claim
17 words
The fusing roller as claimed in claim 36 wherein said magnetic metal layer is formed from nickel.
Claim 47
Dependent Claim
16 words
The fusing roller as claimed in claim 36 wherein said magnetic layer is formed from iron.
Claim 48
Dependent Claim
19 words
The fusing roller as claimed in claim 36 wherein said magnetic metal layer is formed from a nickel-iron alloy.
Claim 49
Dependent Claim
43 words
A fusing roller for an induction heat fusing device comprising: a nonmagnetic metallic hollow roller with electrically insulating and nonmagnetic properties; a heat conduction layer formed on said nonmagnetic metallic hollow roller; and a magnetic metal layer formed on said heat conduction layer.
Claim 50
Dependent Claim
43 words
A fusing roller for an induction heat fusing device comprising: a nonmagnetic metallic hollow roller with electrically insulating and nonmagnetic properties; a heat conduction layer formed on said nonmagnetic metallic hollow roller; and a magnetic metal layer formed on said heat conduction layer.
Claim 51
Dependent Claim
25 words
The fusing roller as claimed in claim 42 wherein said hollow roller is comprised of a material with a specific magnetic permeability of about 1.
Claim 52
Dependent Claim
16 words
The fusing roller as claimed in claim 43 wherein said hollow roller is formed from glass.
Claim 53
Dependent Claim
17 words
The fusing roller as claimed in claim 43 wherein said hollow roller is formed from insulated ceramic.
Claim 54
Dependent Claim
28 words
The fusing roller as claimed in claim 42 wherein said magnetic metal layer is comprised of a material with a specific magnetic permeability of about 100 or more.
Claim 55
Dependent Claim
17 words
The fusing roller as claimed in claim 46 wherein said magnetic metal layer is formed from SUS430.
Claim 56
Dependent Claim
17 words
The fusing roller as claimed in claim 46 wherein said magnetic metal layer is formed from cobalt.
Claim 57
Dependent Claim
17 words
The fusing roller as claimed in claim 46 wherein said magnetic metal layer is formed from nickel.
Claim 58
Dependent Claim
17 words
The fusing roller as claimed in claim 46 wherein said magnetic metal layer is formed from iron.
Claim 59
Dependent Claim
19 words
The fusing roller as claimed in claim 46 wherein said magnetic metal layer is formed from a nickel-iron alloy.
Claim 60
Dependent Claim
21 words
The fusing roller as claimed in claim 46 further comprising a heat resistant separation layer formed on said magnetic metal layer.
Claim 61
Dependent Claim
21 words
The fusing roller as claimed in claim 42, wherein said magnetic metal layer is formed directly on said heat conduction layer.
Claim 62
Dependent Claim
51 words
An induction heat fusing device comprising: a fusing member comprising a nonmagnetic metallic base with good heat conduction properties and a magnetic metal layer formed directly on said base; and an induction coil arranged close to said fusing member that induces an induction current in said magnetic layer to generate heat.
Claim 63
Dependent Claim
51 words
An induction heat fusing device comprising: a fusing member comprising a nonmagnetic metallic base with good heat conduction properties and a magnetic metal layer formed directly on said base; and an induction coil arranged close to said fusing member that induces an induction current in said magnetic layer to generate heat.
Claim 64
Dependent Claim
54 words
A fusing roller for an induction heat fusing device comprising: a nonmagnetic metallic hollow roller with good heat conduction properties; and a magnetic metal layer formed directly on the outer peripheral surface of said nonmagnetic metallic hollow roller that is heated by means of an induction current induced by means of an induction coil.
Claim 65
Dependent Claim
54 words
A fusing roller for an induction heat fusing device comprising: a nonmagnetic metallic hollow roller with good heat conduction properties; and a magnetic metal layer formed directly on the outer peripheral surface of said nonmagnetic metallic hollow roller that is heated by means of an induction current induced by means of an induction coil.
References Cited (Backward Citations)
JPS5933475A
Cited
JPS5933477A
Cited
JPS5933476A
Cited
JPS5933474A
Cited
EP0649072A1
Cited
US5552582A
Cited
US5568235A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2001-06-15 | 2001-12-15 | 2002-06-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2005-06-15 | 2005-12-15 | 2006-06-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2009-06-15 | 2009-12-15 | 2010-06-16 | $7700.00 | Window Closed / Lapsed |