| CPC G03G 15/1615 (2013.01) [G03G 15/161 (2013.01); G03G 2215/1623 (2013.01)] | 13 Claims |
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1. An image forming apparatus comprising:
an intermediary transfer belt onto which a toner image is transferred;
a plurality of stretching rollers configured to stretch the belt,
wherein the stretching rollers include an inner roller forming a transfer portion where the toner image is transferred from the belt onto a recording material and an upstream roller provided upstream of and adjacent to the inner roller with respect to a rotational direction of the belt;
a pressing member contactable to an inner peripheral surface of the belt in at position upstream of the inner roller and downstream of the upstream roller with respect to the rotational direction of the belt and capable of pressing the belt from an inner peripheral surface side toward an outer peripheral surface side by elastically urging the belt;
a supporting member provided movably and configured to support the pressing member;
a moving mechanism configured to move the supporting member; and
a controller capable of executing an operation in a mode in which the toner image is transferred from the belt onto the recording material in a state in which the pressing member presses the belt, and configured to control the moving mechanism,
wherein in a case that the operation in the mode is executed for recording materials of a predetermined kind in a predetermined environmental condition,
when a sum of times each in which the operation in the mode was executed from a new state of the pressing member is a first time, a position of the supporting member during execution of the operation in the mode is a first position, and
when the sum is a second time longer than the first time, the position of the supporting member during the execution of the operation in the mode is a second position where the pressing member is moved in a direction in which the pressing member presses the belt more than in the first position.
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