JP2008180899A5 - - Google Patents

Claims (4)

Fixing means for fixing an image on the conveyed recording medium;
Detecting means for detecting the temperature of the fixing means;
When the temperature detected by the detection means is equal to or lower than the first temperature, the conveyance interval of the recording medium is changed from the first conveyance interval to a second conveyance interval longer than the first conveyance interval , A first transport sequence for returning to the first transport interval when the detected temperature is equal to or higher than a second temperature higher than the first temperature ;
The higher the temperature is detected by the detecting means and the first temperature, the conveyance interval of the recording medium when it becomes below the lower than the second temperature the third temperature from the first conveyance interval A second transport sequence that changes to a third transport interval that is longer than the first transport interval and shorter than the second transport interval ;
The output time of the recording medium required for the specified image formation is calculated by at least the first and second transport sequences, and a transport sequence to be transported at the transport interval at which the calculated output time is short is set. Control means to
An image forming apparatus comprising: The control means is based on a fixing condition of the fixing means, a transition time from the first transport interval to the second transport interval, a return time from the second transport interval to the first transport interval, the image forming apparatus according to claim 1, wherein determining the transition time to the third conveyance interval from the first conveyance interval. 3. The image according to claim 2 , wherein the fixing condition of the fixing unit is selected from a group including a recording medium conveyance interval, a heat capacity of the fixing unit, a heat storage amount of the fixing unit, and a material of the recording medium. Forming equipment. The control means is based on the result of measuring the characteristics of the fixing means in advance, the transition time from the first conveyance interval to the second conveyance interval, and from the second conveyance interval to the first conveyance interval. the recovery time, the first third of conveyance interval of the image forming apparatus according to claim 1, wherein determining the transition time to the conveying spacing.