Fuser for preventing excessive increased temperature in paper non-passing region
AssigneesToshiba Tec Kabushiki Kaisha, Kabushiki Kaisha Toshiba
InventorKazuhiko KIKUCHI
Life of this patent
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Abstract
A fuser includes an endless heat generating part including a conductive layer, an induced current generating part to heat the conductive layer by electromagnetic induction, and a magnetic shunt metal member that is located at a side opposite to the induced current generating part across the heat generating part, forms a first gap between the magnetic shunt metal member and the heat generating part in a first paper passing region of the heat generating part, and forms a second gap, which is different from the first gap in size, between the magnetic shunt metal member and the heat generating part in a second paper passing region different from the first paper passing region.
Claims20
A fuser comprising:
- an endless heat transferring part including a conductive layer, first and second paper passing regions;
- an induced current generating part to heat the conductive layer by electromagnetic induction;
- and
- a magnetic shunt metal member that is located at a side opposite to the induced current generating part across the heat transferring part, and the magnetic shunt metal member that is shaped to form a first gap between the magnetic shunt metal member and the heat transferring part in the first paper passing region, and a second gap, which is different from the first gap in size, between the magnetic shunt metal member and the heat transferring part in the second paper passing region.
An image forming apparatus comprising:
- an image forming part to form an image on a recording medium;
- an endless heat transferring part that includes a conductive layer, first and second paper passing regions and contacts the recording medium to fix the image to the recording medium;
- an induced current generating part to heat the conductive layer by electromagnetic induction;
- and
- a magnetic shunt metal member that is located at a side opposite to the induced current generating part across the heat transferring part, and the magnetic shunt metal member that is shaped to form a first gap between the magnetic shunt metal member and the heat transferring part in the first paper passing region, and a second gap, which is different from the first gap in size, between the magnetic shunt metal member and the heat transferring part in the second paper passing region.
Dependencies are inferred from the claim text.