JP2008139676A5 - - Google Patents

Claims (5)

In an image forming apparatus having a fixing device for fixing through a recording paper on which an unfixed toner image is placed on a contact portion between a fixing roller and a pressure roller
Contacting / separating means for separating and contacting the fixing roller and the pressure roller;
A drive motor for rotating the fixing roller;
A jam detection means for detecting occurrence of a jam in the recording paper ;
When a jam is detected by the jam detection means, the drive motor is stopped to stop the rotation of the fixing roller, and the pressure roller is moved after a predetermined time from the start of the drive motor stop. Control means for controlling the contacting / separating means to be separated from the fixing roller;
An image forming apparatus comprising: A rotating body different from the pressure roller provided so as to be able to contact and separate from the fixing roller;
Another contacting / separating means for separating and contacting the rotating body and the fixing roller;
Have
Wherein, when a jam is detected by the jam detecting means, for controlling said further moving means to cause spacing the rotating body from the stop of the driving start of the drive motor after a predetermined time has elapsed from the fixing roller The image forming apparatus according to claim 1. Wherein said control means has a front function for detecting the rotational speed of the hear movement motor, said predetermined time is characterized in that the rotational speed of the drive motor is a time to equal to or less than a predetermined rotational speed Item 2. The image forming apparatus according to Item 1. The predetermined time is, the image forming apparatus according to claim 3, wherein the precursor drive motor based on the rotational speed of the drive motor is a time until the detected to have stopped. Claim wherein the control means, before having a function of detecting the current supplied to ask dynamic motor, said predetermined time, the current to be detected characterized in that it is a time to equal to or less than a predetermined current value The image forming apparatus according to 1.