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AssigneeSharp Kabushiki Kaisha
InventorsShogo Yokota, Tomohiro Maeda, Toshiaki Kagawa
Estimating the term…
In an external heating type induction heating device in which a magnetic field producing means is arranged in the outer circumferential portion of a heating roller 1, two heat generating layers, namely a conductive shaft 1a and a surface heat generating layer 1c, are provided in the heating roller 1, and the surface heat generating layer 1c is formed having a thickness through which passes a portion of an alternating magnetic field, and the conductive shaft 1a at a center of the heating roller 1 is heated by a portion of the alternating magnetic field produced by the magnetic field producing means passing through the surface heat generating layer 1c to link to the conductive shaft 1a present at the center of the roller, thereby preventing a drop in a surface temperature of the heating roller 1.
An induction heating device comprising a heating roller having a conductive heat generating layer and a magnetic field producing means arranged on a external periphery of the heating roller, and configured such that the conductive heat generating layer is heated by applying alternating magnetic fields, produced by the magnetic field producing means, in the conductive heat generating layer of the heating roller, and heat of the heating roller is transferred to a medium to be heated at open portions where the magnetic field producing means is not arranged at the periphery of the heating roller, wherein the conductive heat generating layer of the heating roller has a conductive shaft that supports the heating roller, and a surface heat generating layer that is provided on a non-conductive heat resistant support member with thermal storage on the conductive shaft, and that is heated by the applied alternating magnetic fields produced by the magnetic field producing means, and the surface heat generating layer is formed having a thickness that enables a portion of the alternating magnetic fields to pass through.
An induction heating device comprising a heating roller having a conductive heat generating layer and a magnetic field producing means arranged on a external periphery of the heating roller, and configured such that the conductive heat generating layer is heated by applying alternating magnetic fields, produced by the magnetic field producing means, in the conductive heat generating layer of the heating roller, and heat of the heating roller is transferred to a medium to be heated at open portions where the magnetic field producing means is not arranged at the periphery of the heating roller,
Dependencies are inferred from the claim text.