Transport cylinder, drying unit comprising this transport cylinder, and sheet-fed printing press comprising this drying unit

A drying unit (16) for drying a radiation-curing printing fluid on a sheet-format substrate (11), comprising a chamber (17) including a gaseous medium that is oxygen-reduced by an inert gas, the oxygen-reduced gaseous medium in the chamber (17) having an oxygen content of no more than one percent;

• an electron beam generator (18) including an electron beam that is directed at the substrate (11) in the chamber (17) being provided for drying the radiation-curing printing fluid;
• the substrate (11) being guided, or at least being guidable, through this chamber (17) while being held at the outer surface (03) of a transport cylinder (01);
• the transport cylinder (01), at its outer surface (03), including at least one channel (04) extending in each case transversely to the transport direction (T) of the relevant substrate (11);
• at least one gripper (06), which is supported on a shaft (07), for holding the relevant substrate (11) on the outer surface (03) of this transport cylinder (01) being in each case arranged in the relevant channel (04);
• the relevant gripper (06), in its operating state in which it holds the relevant substrate (11) on the outer surface (03) of this transport cylinder (01), being arranged completely beneath a plane formed by the outer surface (03) of this transport cylinder (01);
• the relevant channel (04) being covered by a cover (08) at the outer surface (03) of the transport cylinder (01);
• and the relevant cover (08) and/or the shaft (07) supporting the at least one gripper (06) each comprising a cooling unit.

A sheet-fed printing press, comprising at least one printing unit for printing sheet-format substrates (11) with a radiation-curing printing fluid and comprising a drying unit (16), which is arranged downstream from the relevant printing unit in the transport direction (T) of the relevant substrates (11), for drying the radiation-curing printing fluid on these substrates (11);

• the drying unit (16) comprising a chamber (17) including a gaseous medium that is oxygen-reduced by an inert gas;
• the oxygen-reduced gaseous medium in the chamber (17) having an oxygen content of no more than one percent;
• an electron beam generator (18) including an electron beam that is directed at the respective substrate (11) in the chamber (17) being provided for drying the radiation-curing printing fluid;
• the substrate (11) being guided, or at least being guidable, through this chamber (17) while being held at the outer surface (03) of a transport cylinder (01) that is arranged in a stationary manner in a frame of the sheet-fed printing press;
• the transport cylinder (01), at its outer surface (03), including at least one channel (04) extending in each case transversely to the transport direction (T) of the relevant substrate (11);
• at least one gripper (06), which is supported on a shaft (07), for holding the relevant substrate (11) on the outer surface (03) of this transport cylinder (01) being in each case arranged in the relevant channel (04);
• the relevant gripper (06), in its operating state in which it holds the relevant substrate (11) on the outer surface (03) of this transport cylinder (01), being arranged completely beneath a plane formed by the outer surface (03) of this transport cylinder (01);
• the relevant channel (04) being covered by a cover (08) at the outer surface (03) of the transport cylinder (01);
• and the relevant cover (08) and/or the shaft (07) supporting the at least one gripper (06) each comprising a cooling unit.