| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an image heating device for increasing the speed in starting a heating rotational body for starting heating of the surface of the heating rotational body and decreasing rotation torque when starting the heating rotational body. <P>SOLUTION: The image heating device includes: the heating rotational body 10 having at least a heat-insulating elastic layer 12 containing air bubble and a heat conductive releasing layer 11 on an outermost layer; a heating source 31 for heating the surface of the heating rotational body from the outside; and a pressure member 20 pressed against the surface of the heating rotational body and brought into contact with the surface of the heating rotational body, thereby forming a nip part F. The image heating device heats an image t on a recording material by the heat of the heating rotational body while holding and conveying the recording material P by the nip part. The image heating device has a pressure adjustment means 50 that variably changes pressing force of the pressure member to the surface of the heating rotational body. At least when the heating of the surface of the heating rotational body is started, the pressure adjustment means decreases the pressing force applied to the case when an image on a recording material is heated by the heat of the heating rotational body. <P>COPYRIGHT: (C)2009,JPO&INPIT |
