Image forming apparatus

摘要

An image forming apparatus includes: heating and pressing rollers for fixing a toner image; a contacting and spacing portion for contacting and spacing between the rollers; an air feeder for cooling the pressing roller during a job; a guide for the sheet having been subjected to an image fixing process; an acquiring portion for acquiring the temperature of the guide: and an executing portion for executing a warming-up process of the heating roller and the pressing roller to raise the temperatures of the heating roller and the pressing roller. The executing portion controls the contacting and spacing portion and the air feeder so that the air is fed toward the guide through between the heating roller and the pressing roller at least in a part of the warming-up process, when the temperature is lower than a predetermined temperature upon activation of a main voltage source.

主权项

1. An image forming apparatus comprising:
an image forming portion configured to form a toner image on a sheet; first and second rotatable members configured to form a nip for heating the toner image on the sheet therebetween; a guiding portion provided adjacent to the nip and configured to guide the sheet passing through the nip; an executing portion configured to execute a warm-up process to raise temperature of said first and second rotatable members, which are spaced from each other; and an air blowing portion configured to blow air toward said guiding portion through a portion between said first and second rotatable member which are spaced from each other to heat said guiding portion during at least one time period of the warm-up process.