Patent ID: 9298153
Filing Date: 2016-03-29
CPC Classification: G03G

Claim Text:
1. A decurling device comprising: a shaft; a decurling roller that has a diameter larger than that of the shaft, that becomes concave along an outer periphery of the shaft by being pressed against the shaft, and that removes curl from a transported object by nipping the transported object between the decurling roller and the shaft; and a restriction unit that restricts a direction in which the shaft is bent due to a load that the shaft receives from the decurling roller so that a middle portion of the shaft in an axial direction is convexly curved downstream in a transport direction of the transported object, wherein the restriction unit includes a pair of first contact members that are disposed on an opposite side of the shaft from the decurling roller, the first contact members being in contact with the shaft at positions that are near both ends of the shaft in the axial direction and that are downstream in the transport direction from a straight line that connects an axis of the shaft and a roller axis of the decurling roller to each other, and a second contact member that is disposed on the opposite side of the shaft from the decurling roller and that restricts bending of the middle portion, in the axial direction, of the shaft upstream in the transport direction by contacting the middle portion at a position that is upstream from the straight line in the transport direction, a distance from the position at which the second contact member is in contact with the shaft to the straight line being larger than a distance from the positions at which the first contact members are in contact with the shaft to the straight line.