Material web processing device

The utility model relates to a material web processing device. The material web processing device is especially used for a calendar (1) of paper webs or paperboard webs (2), and comprises at least one roller gap (19) formed by two rollers (5 and 18), and material webs can be guided to penetrate through the roller gap. The material web processing device is provided with a material web leaning belt (4) moving around at least two belt conveying rollers (11 and 12 and 13) in a guiding mode. The material webs can be leaned against at least one heatable roller (5) along a wrap angle larger than 5 degrees by means of the material web leaning belt. The material web leaning belt can be adjusted to a work position from a separation position by means of a movable support (23) and at least one servo motor (7), and is lifted from the heatable roller on the separation position and attached to the heatable roller on the work position. On the work position, a composite force vector generated by leaning the material web leani