Sheet-transporting drum and printing machine having the sheet-transporting drum

The invention relates to a sheet-transporting drum and a printing machine having the sheet-transporting drum. The sheet-transporting drum 10 includes sheet-supporting areas 21 each being formed of a first comb segment 11 and a second comb segment 12 having segment teeth 14. At least one of the comb segments 11,12 is rotatable for adaptation to a sheet format. A mechanical leading-edge gripper 15 is provided on the first comb segment 11 and a pneumatic trailing-edge gripper 19 is provided on the second comb segment 12. A mechanical trailing-edge gripper is additionally disposed on the second comb segment and is deactivatable in particular by format adjustments. This advantageously allows either the trailing edge of a sheet to be securely held down mechanically or a full-bleed print to be applied to the sheet when the trailing edge of the sheet is held down pneumatically. 本发明涉及种页张输送辊和页张印刷机。页张输送辊(10)具有页张支承面，各页张支承面(21)由具有部段尖齿(14)的第和第二梳状部段(11、12)构成，至少个梳状部段(11、12)可旋转地支承，用于适配于页张规格。在第梳状部段(11)上被安装了机械式前缘抓取器(15)，在第二梳状部段