Electrophotography – Control of electrophotography process – Responsive to copy media characteristic
Reexamination Certificate
2007-02-13
2009-02-24
Tran, Hoan H (Department: 2852)
Electrophotography
Control of electrophotography process
Responsive to copy media characteristic
C219S619000, C399S067000, C399S069000, C399S122000
Reexamination Certificate
active
07496303
ABSTRACT:
A fixing device, an image forming apparatus having the same include a fixing member having an outer peripheral face with which a sheet to be transported is brought into pressure contact, an exciting coil for induction heating of a heat generating layer of the fixing member, and an RF power supply circuit for applying a voltage of a certain drive frequency to the exciting coil. A degaussing coil is placed in small size sheet non-passing regions corresponding to end sections of the outer peripheral face of the fixing member with respect to the width direction of the sheet. A changeover switch opens or closes the degaussing coil in accordance with the size of the sheet to be transported. A control section is provided for changing and setting a drive frequency of the RF power supply circuit along with opening or closing of the degaussing coil.
REFERENCES:
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patent: 6373036 (2002-04-01), Suzuki
patent: 7005619 (2006-02-01), Fujii et al.
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Office Action issued in corresponding Japanese Patent Application No. 2006-050106, mailed Apr. 15, 2008, and translation thereof.
Buchanan & Ingersoll & Rooney PC
Konica Minolta Business Technologies Inc.
Tran Hoan H
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