Cylinder for a sheet-treating and/or sheet-processing machine with suction air openings and machine for treating and/or processing sheet-format substrate comprising such a cylinder

A cylinder (26;

• 17;
• 152;
• 12) for a sheet-treating and/or sheet-processing machine (01), the cylinder (26;
• 17;
• 152;
• 12) comprising a holding means (33) around a circumference thereof, by which a substrate sheet (02) to be conveyed over the cylinder (26;
• 17;
• 152;
• 12) can be picked up at a leading end thereof and can be or is held during a rotation of the cylinder (26;
• 17;
• 152;
• 12) over a rotation angle range between when the substrate sheet (02) is received and when the substrate sheet (02) is transferred downstream, the cylinder (26;
• 17:152;
• 12) further comprising a rotary union (123), which comprises a rotor (124) rotating along with the cylinder (26;
• 17;
• 152;
• 12) which, at an end face, is non-rotatably arranged at a shaft end (128) of a shaft (32) driving the cylinder (26;
• 17;
• 152;
• 12) or at an end-face cylinder journal (128), as well as a stator (126) that does not rotate during regular operation, the rotary union (123) configured to enable vacuum pressure to be applied to suction openings (42) or groups of suction openings (42) provided around the circumference of the cylinder (26;
• 17;
• 152;
• 12) while an active rotation angle phase of the cylinder (26;
• 17;
• 152;
• 12) about an axis of rotation (R) thereof is being run through, characterized in that
• the rotary union (123) can be set in terms of a size of a passage angle sector (Df) determining a size of the active rotation angle phase and/or in terms of a position of the passage angle sector (Df) determining a position of the active rotation angle phase;
• and
• that the stator (126) is configured as a multi-piece stator (126) comprising a first stator part (131) and a second stator part (132), which can both be adjusted, in terms of a rotational position thereof with respect to one another and relative to an axis of rotation, about the axis of rotation (R) of the cylinder (26;
• 17;
• 152;
• 12) or an axis coinciding therewith.