Electrophotography – Image formation – Fixing
Reexamination Certificate
2005-03-08
2005-03-08
Tran, Hoan (Department: 2852)
Electrophotography
Image formation
Fixing
C219S216000
Reexamination Certificate
active
06865365
ABSTRACT:
A heating roller of a fixing apparatus capable of blocking power to a heating roller when temperature rises over a predetermined temperature. The heating roller includes an OFC pipe, a heating coil disposed to cover an outer circumference of OFC pipe, an aluminum pipe covering an outer circumference of heating coil, an insulator to cover a surface of heating coil and separate the heating coil from contact with OFC pipe and aluminum pipe, and an electrode installed at both ends of the aluminum pipe and having a terminal in electrical contact with the heating coil that melts when its temperature rises above a predetermined temperature. The terminal can be removed from the heating coil in the event such melting occurs. The heating roller further includes a brush which contacts an outside surface of the electrode to provide AC power to the electrode. Accordingly, when the temperature of the heating coil rises above a predetermined temperature, the terminal of the electrode melts and thus discontinues the supply of AC power from the brush to the heating coil. Terminal includes a base protruded from electrode, a melting portion continued to base, and a connection connected with heating coil and continued to melting portion, and when temperature of heating coil rises over predetermined temperature, melting portion is melted and supply of AC power transmitted to heating coil is cut off.
REFERENCES:
patent: 5737664 (1998-04-01), Fukuda et al.
patent: 5765075 (1998-06-01), Yamamoto
patent: 6615006 (2003-09-01), Michlin et al.
patent: 62-286079 (1987-12-01), None
patent: 3-144681 (1991-06-01), None
Cho Durk-hyun
Kim Hwan-guem
Roylance Abrams Berdo & Goodman L.L.P.
Tran Hoan
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