| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a fixing device capable of adjusting a heating member or fixing member at a predetermined temperature in accordance with the size of a recording medium, and capable of shortening a period of time required to start printing after the generation of a print start signal, and to provide an image forming apparatus. <P>SOLUTION: The fixing device 20 for fixing a toner image to a recording medium S includes: a magnetic flux generating means 24 for generating a magnetic flux; a heating member 23 heated by the magnetic flux generated by the magnetic flux generating means 24; a magnetic flux adjusting member 29 for adjusting the magnetic flux acting on the heating member 23; a heating range altering means 50 for altering a heating range by driving the magnetic flux adjusting member 29; and a fixing member 22 for melting a toner image on a recording medium S. The heating range altering means 50 alters the heating range of the heating member 23 according to the size of a recording medium S and sets the heating range based on the size of the recording mediums S until at least either the heating member 23 or the fixing member 22 reaches a predetermined fixing temperature after the fixing device 20 receives a drive start signal. <P>COPYRIGHT: (C)2008,JPO&INPIT |
