Induction heat fusing device

Details Induction heat fusing device Induction heat fusing device

1996-08-12

1998-10-13

Smith, Matthew S.

Electrophotography

Image formation

Fixing

219619, 219671, 399122, 399334, G03G 1520

Patent

active

058226699

ABSTRACT:
An induction heating device for printers, copiers and the like includes a magnetic coil assembly and a heated metal body that form a closed magnetic circuit. To compensate for the effects of heat radiation at the ends of the heated metal body, a greater amount of heat is generated at the ends of the body than at the center thereof. In one approach, the amount of heat is varied by changing physical parameters of the magnetic circuit, such as the spacing of the coil assemblies from the heated body, the relative sizes of the cores, and/or the relative magnetic permeability of the cores. In another approach, the electrical connection of the coils of multiple assemblies are arranged such that the coils in the center of the heated body are in parallel, and the coils at the ends of the body are in series with the parallel central coils.

REFERENCES:
patent: 5074019 (1991-12-01), Link
patent: 5526103 (1996-06-01), Kato et al.
patent: 5552582 (1996-09-01), Abe et al.
patent: 5568240 (1996-10-01), Ohtsuka

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