Induction heated fusing apparatus having a dual function transfo

Details Induction heated fusing apparatus having a dual function transfo Induction heated fusing apparatus having a dual function transfo

1999-05-10

2000-09-19

Braun, Fred L.

Electrophotography

Image formation

Fixing

G03G 1520

Patent

active

061224774

ABSTRACT:
An induction heated fusing apparatus having a dual function transformer assembly includes a pressure roller, an induction heatable fuser roller, an electrical circuit subassembly coupled to a primary transformer coil and connectable to an AC power supply source. The electrical circuit assembly includes a bridge circuit and a pair of transistors having their emitters connected to an output of a bridge circuit, their bases connected to opposite ends of an auxiliary conductive coil winding, and their collectors connected to opposite ends of a primary transformer coil, wherein the pair of transistors and the primary transformer coil are alternately driven by voltage changes across the auxiliary conductive coil winding.

REFERENCES:
patent: 4570044 (1986-02-01), Kobayashi et al.
patent: 5745833 (1998-04-01), Abe et al.
patent: 5783806 (1998-07-01), Hayasaki
patent: 5801359 (1998-09-01), Mano et al.
patent: 5862445 (1999-01-01), Ogawa et al.
patent: 5911094 (1999-06-01), Tsujimoto

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