Image forming apparatus
AssigneesKabushiki Kaisha Toshiba, Toshiba Tec Kabushiki Kaisha
InventorsKazuhiko Kikuchi, Kazushige Morihara, Satoshi Kinouchi, Osamu Takagi, Shin Yamauchi
Life of this patent
Estimating the term…
Abstract
In an image forming apparatus according to the present invention, a shield plate 202 which is made of a specific material and has a specific thickness is provided between an exciting coil and at least one of a first and a second magnetic field intensity measuring point P1, P2, which prevents a magnetic field of a specific magnetic field intensity or higher from leaking to the outside of the image forming apparatus or alleviates the effect of the magnetic field on the circuits in the apparatus or optionally installed devices.
Claims1
An image forming apparatus comprising:
- a heating member which includes a conductive member containing a coil for, when supplied with a voltage and current of a specific frequency, producing a magnetic field of a specific magnetic field intensity and generating heat by the magnetic field supplied from the coil;
- a magnetic field attenuating mechanism (shield plate 202) which is capable of attenuating the magnetic field intensity of the magnetic field passing through the mechanism;
- and
- at least one magnetic field attenuating mechanism unit which is provided between a specific magnetic field intensity measuring point and the coil.
Dependencies are inferred from the claim text.