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US6349187B2 Expired / Lapsed US ⏱️ 0.0 years remaining

Image forming apparatus

Assignee: Canon Inc
•
Filing: 2000-12-29
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Granted: 2002-02-19
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Expires: 2020-12-29
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Abstract

Abstract The present invention provides an image forming apparatus that has unfixed image forming device for forming an unfixed image based on an image formation start signal, and fixing device for fixing the unfixed image, formed by the unfixed image forming device, on a recording material, wherein the fixing device includes a rotating member and magnetic flux generating device for generating a magnetic flux by supplying power, wherein the magnetic flux generated by the magnetic flux generating device generates an eddy current in the rotating member, so that the rotating member generates heat, thereby an image on the recording material is heated, and wherein, in a stand-by state prior to an input of the image formation start signal, a rotation of the rotating member is stopped and the magnetic flux generating device is energized.

Inventors

  • 👤 Yasuhiro Hayashi

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-09 05:10
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/20; G03G15/2003; G03G15/2014; G03G15/2053; G03G15/2039; G03G15/205; G03G2215/00; G03G2215/20; G03G2215/2003; G03G2215/2016; G03G2215/2035

Claims Analysis

Total Claims: 6
Claim 1
Independent Claim 128 words
An image forming apparatus comprising: unfixed image forming means for forming an unfixed image based on an image formation start signal; and fixing means for fixing the unfixed image, formed by said unfixed image forming means, on a recording material; wherein said fixing means includes a rotating member and magnetic flux generating means for generating a magnetic flux by supplying power, wherein the magnetic flux generated by said magnetic flux generating means generates an eddy current in said rotating member, so that said rotating member generates heat, thereby an image on the recording material is heated, and wherein, in a stand-by state prior to an input of said image formation start signal, a rotation of said rotating member is stopped and said magnetic flux generating means is energized.
Claim 2
Dependent Claim 128 words
An image forming apparatus comprising: unfixed image forming means for forming an unfixed image based on an image formation start signal; and fixing means for fixing the unfixed image, formed by said unfixed image forming means, on a recording material; wherein said fixing means includes a rotating member and magnetic flux generating means for generating a magnetic flux by supplying power, wherein the magnetic flux generated by said magnetic flux generating means generates an eddy current in said rotating member, so that said rotating member generates heat, thereby an image on the recording material is heated, and wherein, in a stand-by state prior to an input of said image formation start signal, a rotation of said rotating member is stopped and said magnetic flux generating means is energized.
Claim 3
Dependent Claim 28 words
An image forming apparatus according to claim 1 , wherein, after the input of the image formation start signal, said rotating member is rotated for a predetermined period.
Claim 4
Dependent Claim 33 words
An image forming apparatus according to claim 1 , wherein said stand-by state is a state after a preparatory operation of said apparatus is completed after a power supply therefor is turned on.
Claim 5
Dependent Claim 17 words
An image forming apparatus according to claim 1 , wherein said rotating member is a rigid roller.
Claim 6
Dependent Claim 43 words
An image forming apparatus according to claim 1 , further comprising a back-up member forming a nip with said rotating member, wherein said nip sandwiches and conveys the recording material bearing the unfixed image and fixed the unfixed image to the recording material.

References Cited (Backward Citations)

JPH10171296A Cited
JPH11133803A Cited
US6298213B1 Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 2005-02-18 2005-08-20 2006-02-19 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 2009-02-18 2009-08-20 2010-02-19 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 2013-02-18 2013-08-20 2014-02-19 $7700.00 Window Closed / Lapsed

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