Fixing device and image forming apparatus

An image forming apparatus comprising:

• an image bearer to bear a toner image;
• and
• a fixing device disposed downstream from the image bearer in a recording medium conveyance direction to fix the toner image on a recording medium,
• the fixing device including:
• a fixing rotator rotatable in a predetermined direction of rotation;
• a pressure rotator disposed opposite the fixing rotator to form a fixing nip therebetween, through which the recording medium bearing the toner image is conveyed;
• a first heater disposed inside the fixing rotator to generate an increased amount of heat to heat the fixing rotator, the first heater including a first heat generator having a first heating span in a longitudinal direction of the first heater;
• a second heater disposed inside the fixing rotator to generate a decreased amount of heat to heat the fixing rotator, the second heater including a second heat generator having a second heating span in a longitudinal direction of the second heater;
• and
• a partition interposed between the first heater and the second heater to define a first compartment having an increased size and accommodating the first heater and a second compartment having a decreased size and accommodating the second heater.