US5526103A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Induction heating fixing device
Assignee: Minolta Co Ltd
•
Filing: 1995-03-30
•
Granted: 1996-06-11
•
Expires: 2015-03-30
Abstract
Abstract An induction heating fixing device comprises a heat roller in which coil assemblies are disposed. The coil assemblies are aligned axially of the roller to produce magnetic flux in a direction orthogonal to the axis of the heat roller.
Inventors
- 👤 Takeshi Kato
- 👤 Satoru Yoneda
- 👤 Eiji Okabayashi
- 👤 Peter Johnston
- 👤 Hiroaki Hinotani
- 👤 Tohru Fujiwara
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 04:38
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: 13
Claim 1
Independent Claim
93 words
An induction heating fixing device comprising: a heat roller formed by an electrically conductive member and having a hollow space in its interior; a pressure roller disposed in pressing contact with the heat roller; a core disposed within the heat roller in a direction orthogonal to the axis of rotation of the heat roller to form a magnetic path for guiding magnetic flux in said direction orthogonal to the axis of rotation of the heat roller; a coil provided around the core; and a circuit for passing an alternating current through the coil.
Claim 2
Dependent Claim
93 words
An induction heating fixing device comprising: a heat roller formed by an electrically conductive member and having a hollow space in its interior; a pressure roller disposed in pressing contact with the heat roller; a core disposed within the heat roller in a direction orthogonal to the axis of rotation of the heat roller to form a magnetic path for guiding magnetic flux in said direction orthogonal to the axis of rotation of the heat roller; a coil provided around the core; and a circuit for passing an alternating current through the coil.
Claim 3
Dependent Claim
70 words
An induction heating fixing device as claimed in claim 1, wherein said coil has first and second opposed sides which are parallel to said axis of rotation of said heat roller, and wherein said device further comprises a thermistor which is pressed against the surface of the heat roller so as to be opposed to said first side of the coil with the wall of the heat roller interposed therebetween.
Claim 4
Dependent Claim
23 words
An induction heating fixing device as claimed in claim 2, wherein said second side of said coil is opposed to the pressure roller.
Claim 5
Dependent Claim
24 words
An induction heating fixing device as claimed in claim 3, wherein said circuit supplies an alternating current based on an output from the thermistor.
Claim 6
Dependent Claim
57 words
An induction heating fixing device as claimed in claim 1, further comprising a temperature fuse which is pressed against the surface of the heat roller so as to be opposed to a side of the coil which is parallel to the axis of rotation of said heat roller with the wall of the heat roller interposed therebetween.
Claim 7
Dependent Claim
77 words
An induction heating fixing device as claimed in claim 1, further comprising a second core having a width larger than that of the first core in the axial direction and a second coil provided around the second core, the first core and the second core being aligned axially of the heat roller so that each coil has a side thereof which is parallel to the axis of rotation of said heat roller opposed to the pressure roller.
Claim 8
Dependent Claim
72 words
An induction heating fixing device comprising: a heat roller formed by an electrically conductive member and having a hollow space in its interior; a pressure roller disposed in pressing contact with the heat roller; a plurality of coil assemblies disposed within the heat roller to produce magnetic flux in a direction orthogonal to the axis of rotation of the heat roller; and a circuit which passes an alternating current through the coil.
Claim 9
Dependent Claim
72 words
An induction heating fixing device comprising: a heat roller formed by an electrically conductive member and having a hollow space in its interior; a pressure roller disposed in pressing contact with the heat roller; a plurality of coil assemblies disposed within the heat roller to produce magnetic flux in a direction orthogonal to the axis of rotation of the heat roller; and a circuit which passes an alternating current through the coil.
Claim 10
Dependent Claim
28 words
An induction heating fixing device as claimed in claim 7, wherein said coil assemblies are so arranged that each two adjacent coil assemblies produce flux in opposite directions.
Claim 11
Dependent Claim
21 words
An induction heating fixing device as claimed in claim 7, wherein said circuit selectively passes an alternating current through each coil.
Claim 12
Dependent Claim
55 words
An induction heating roller comprising: an electrically conductive roller having a hollow space in its interior; a coil formed by winding a wire; and a holder which holds said coil within the heat roller so that individual turns of the wire each extend along planes parallel to the axis of rotation of the heat roller.
Claim 13
Dependent Claim
55 words
An induction heating roller comprising: an electrically conductive roller having a hollow space in its interior; a coil formed by winding a wire; and a holder which holds said coil within the heat roller so that individual turns of the wire each extend along planes parallel to the axis of rotation of the heat roller.
References Cited (Backward Citations)
US3809855A
Cited
JPS57133466A
Cited
JPS57205766A
Cited
JPS58178385A
Cited
US4570044A
Cited
US5074019A
Cited
JPH04306588A
Cited
JPH04306585A
Cited
US5303016A
Cited
JPH05135867A
Cited
US5393959A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1999-06-11 | 1999-12-11 | 2000-06-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2003-06-11 | 2003-12-11 | 2004-06-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2007-06-11 | 2007-12-11 | 2008-06-11 | $7700.00 | Window Closed / Lapsed |