Patent ID: 9411284
Filing Date: 2016-08-09
CPC Classification: G03G

Claim Text:
1. A fixing device comprising: a rotatable fuser member subjected to heating; a rotatable pressure member disposed opposite the fuser member, the pressure member pressing against the fuser member to form a fixing nip therebetween, through which multiple recording media, each spaced apart from each other by an interval distance in a conveyance direction, are sequentially conveyed at a conveyance speed; a heater adjacent to the fuser member to heat the fuser member; and a controller operatively connected to the heater to control a power supply to at least a portion of the heater corresponding to a portion of the fuser member that contacts the multiple recording media through a series of on-off switching control cycles, each on-off switching control cycle including an on-time during which the power supply to the portion of the heater is on to increase heating of the portion of the fuser member, and an off-time during which the power supply to the portion of the heater is off, in synchronization with conveyance of the recording medium to satisfy the following equation: where “T wherein the controller resets a timing of a series of on-off switching control cycles corresponding to a print job, such that the heater is activated to heat the fuser member simultaneously with entry of each recording medium for the print job into the fixing nip.