Fixing device and image forming apparatus incorporating same
AssigneeRicoh Company, Ltd.
InventorsMotokazu Hasegawa, Susumu Matsusaka, Yukari Isoe
Life of this patent
Estimating the term…
Abstract
A fixing device includes a fixing member including a heat generator and an induction heater to heat the fixing member by electromagnetic induction. The induction heater includes an excitation coil, a ferromagnetic core to form a magnetic path to direct magnetic flux arising from the excitation coil to the fixing member, and a holder to hold the excitation coil and the ferromagnetic core. The holder has a surface facing the heat generator. The surface has a plurality of slits extending parallel to a direction of rotation of the fixing member. The ferromagnetic core is coupled to the holder and covers an open bottom portion of each slit of the plurality of slits to form a plurality of bottomed grooves.
Claims5
A fixing device comprising:
- a fixing member including a heat generator;
- and
- an induction heater to heat the fixing member by electromagnetic induction,
- the induction heater including:
- an excitation coil;
- a ferromagnetic core to form a magnetic path to direct magnetic flux arising from the excitation coil to the fixing member;
- and
- a holder to hold the excitation coil and the ferromagnetic core,
- the holder having a surface facing the heat generator, the surface having a plurality of slits extending parallel to a direction of rotation of the fixing member,
- the ferromagnetic core coupled to the holder and covering an open bottom portion of each slit of the plurality of slits to form a plurality of bottomed grooves.
Dependencies are inferred from the claim text.