Sheet turning device for sheet-fed printing machine, has gripper channel with channel width measured along print cylinder circumference, where width and circumferential gap of printing transfer points of drum are equal in length

摘要

The device has a print cylinder (1) e.g. double-sided print cylinder, and a turning drum (2) e.g. single-sided drum, aligned such that reverse-printing grippers (5) are immersed into a gripper channel (GK) for gripping of rear edge areas (HK) of sheets. A channel width (LK) of the channel and a circumferential gap (LW) of face-and reverse printing transfer points (PS, PW) of the drum are equal in length. The width is measured along a print cylinder circumference between a channel rear edge (GHK) and a print cylinder gripper impact area. The gap is formed at an outer circumference of the drum.