Patent ID: 7983582

Claim:
An image forming apparatus, comprising: an image carrier on which an electrostatic latent image is formed; a developing unit disposed facing the image carrier to develop the latent image with developer; a transfer unit to transfer the developed image onto a sheet of recording media; and a fixer to fix the image on the sheet, the fixer including: a rotary heat generator including a heat generation layer; a pressure member to form a nip with the rotary heat generator to sandwich the sheet therebetween; an excitation coil disposed facing the rotary heat generator, to inductively heat the heat generation layer; a demagnetization coil disposed facing the heat generation layer, to generate magnetic flux that partly counteracts magnetic flux generated by the excitation coil; and a fixer controller to control activation of the excitation coil as well as the demagnetization coil before a second image formation job following a first image formation job in which an image is formed on a sheet of recording media whose width is smaller than a maximum sheet width usable in the fixer.