Sheet troller of printing machine

A sheet troller of a printing machine comprises a first roller (1), a first drive (11) for rotating the first roller, a second roller (2), the second roller of the first roller in the sheet conveyingdirection (BFR) of the sheets to be unrolled or smoothed follows. The first drive is controlled by a controller (17) such that at constant printing speed of the printing press, the first roller rotates unevenly in the conveying cycle of the sheet. 本发明涉及种印刷机页张展开器，包括第辊(1)，用于旋转所述第辊的第驱动器(11)，第二辊(2)，其中，所述第二辊在待展开或待平整页张(B)的页张传送方向(BFR)上跟随所述第辊。所述第驱动器由控制装置(17)这样地控制，使得当印刷机印刷速度恒定时，所述第辊在页张的传送节奏方面变化地旋转。