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US 4,572,071 AGranted
Device for guiding sheets printed on one or both sides
AssigneeMAN Roland Druckmaschinen AG
InventorsBert Cappel, Norbert Kreuzer
Life of this patent
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AssigneeMAN Roland Druckmaschinen AG
InventorsBert Cappel, Norbert Kreuzer
Estimating the term…
A sheet guiding device for use with a multicolor printing press having multiple printing units and a sheet stacker wherein the sheet guiding means is disposed between at least one of a pair of printing units and the stacker for guiding sheets therebetween, the guiding means including a chain conveyor with sheet grippers overlying a guide surface between the printing units and the stacker with a plurality of air nozzles formed in the surface of the guide surface and communicating with a plurality of flow ducts, the guide surfaces being disposed continuously and uninterruptedly between the printing units and the sheet stacker and the air nozzles being in the form of apertures in the guide surfaces having a diameter of about 15 mm, the area of the apertures being from 15 to 30% of the total guide surface area, the apertures being supplied by low-pressure high-volume-flow fans disposed in the flow ducts and the fans being reversible so that the nozzles can be selectively supplied with air at a positive or negative pressure.
For use with a multicolor printing press having multiple printing units and a sheet stacker, a sheet guiding means disposed between at least one of a pair of said units and one of said units and said stacker for guiding sheets therebetween, said guiding means including a chain conveyor with sheet grippers overlying a guide surface between said units in said stacker with a plurality of air nozzles formed in the surface of said guide surface and communicating with a plurality of flow ducts, characterized in that the guide surfaces are disposed continuously and uninterruptedly between said printing units and said sheet stacker and the air nozzles take the form of apertures in the guide surfaces having a diameter of about 15 mm, the area of the apertures being from 15 to 30% of the total guide surface area, the apertures being supplied by low-pressure high-volume-flow fans disposed in the flow ducts and in that the fans are reversible so that the nozzles can be selectively supplied with air at a positive or negative pressure.
Dependencies are inferred from the claim text.