Electrophotography – Image formation – Fixing
Reexamination Certificate
2005-10-21
2008-10-14
Beatty, Robert (Department: 2852)
Electrophotography
Image formation
Fixing
C399S334000, C219S216000, C219S619000
Reexamination Certificate
active
07437113
ABSTRACT:
An image heating apparatus has a coil for generating magnetic flux, a rotatable heat generation member which generates heat by magnetic flux, a temperature detecting member for detecting a temperature of the heat generation member, an energization controller portion for controlling energization to the coil on the basis of an output of the temperature detecting member, a first magnetic flux shielding portion for blocking, in a first magnetic flux adjustment position, the magnetic flux directed toward a central portion of heat generation member, while permitting the magnetic flux directed to an end portion, and a second magnetic flux shielding portion for blocking, in a second magnetic flux adjustment position, the magnetic flux directed toward an end portion of the heat generation member, a moving unit for moving the first magnetic flux shielding portion and the second magnetic flux shielding portion, and a recovery operation controller portion for retracting the second magnetic flux shielding portion from the second magnetic flux adjustment position and moving the first magnetic flux shielding portion to the first magnetic flux adjustment position after completion of an image formation job on recording materials having widths smaller than a maximum width of a recording material which can be fed are continuously fed, and executing energization control of the energization controller portion.
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Kondo Toshiharu
Nakase Takahiro
Suzuki Hitoshi
Yamamoto Naoyuki
Yoshimura Yasuhiro
Beatty Robert
Canon Kabushiki Kaisha
Fitzpatrick ,Cella, Harper & Scinto
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