Patent ID: 9383693
Filing Date: 2016-07-05
CPC Classification: G03G

Claim Text:
1. A fixing device comprising: a fixing rotary body rotatable in a predetermined direction of rotation; a heater disposed opposite and heating the fixing rotary body; an opposed body contacting the fixing rotary body with releasable pressure therebetween to form a fixing nip therebetween through which a recording medium is conveyed; a heat shield interposed between the heater and the fixing rotary body and movable in a circumferential direction to vary a direct heating span of the fixing rotary body between a home position where the heat shield is disposed opposite the heater indirectly and a shield position where the heat shield is disposed opposite the heater directly to shield the fixing rotary body from the heater; and a controller operatively connected to the heater and the heat shield, the controller configured to direct the heater to power on for printing of a print job, to retain the heat shield at the home position for a period of time based on time information that varies depending on a size of the recording medium, and to initiate movement of the heat shield from the home position after the period of time.