Abstract: The invention relates to an apparatus for offset presses, and includes an air-IR drying box, through which ready printed sheets are caused to be conveyed with the aid of a sheet gripping shaft, for the purpose of drying pigment deposited on the sheets. The box has top and bottom sections separated at each lateral side by a gap between the sections. Brushes along the gaps delimit the box laterally. The brush at each lateral side comprises brush material covering the respective gap and extending perpendicularly to the conveying direction for preventing the spread of heat radiation and hot air from the IR lamps in the box to different machine parts of the press. The gripping shaft is of a length to extend through the gaps and to deflect the brush material as the shaft passes along the gap.

Abstract: An infrared drier in a sheet offset press having a low sheet discharge conveyor. The drier includes an infrared battery under which ready-print sheets are fed for drying ink fields on the sheets. The battery is situated under and adjacent to the ink rolls located in the last stand of the printing unit of the press. The battery is cooled by a cooling air system in which a supply air fan blows air into one end of the battery. The air is removed from the other end of the battery by an exhaust fan. An exhaust station is arranged under the drying position of the sheets under the battery and connected to the exhaust fan such that hot air is extracted from the ink rolls, as well as from a region adjacent the infrared battery.