Patent ID: 7325493
Filing Date: 2008-02-05
Classification: B41F

Abstract:
1. In a sheet-fed rotary printing press for selective recto printing and recto and verso printing, having printing unite with respective impression cylinders, the improvement comprising: a three-drum reversing device having three cylinders cooperatively disposed behind one another between the impression cylinders of an adjacent two of the printing units; said three cylinders being one at least double-size transfer cylinder, one at least double-size storage drum, and one single-size reversing drum; said storage drum having trailing edge suckers and additionally having suction devices in a sheet supporting region thereof; said transfer cylinder having grippers prescribing a circular periphery of said transfer cylinder, and said transfer cylinder having an outer contour located within said circular periphery prescribed by said grippers of said transfer cylinder for transporting a sheet on said transfer cylinder at a distance from said outer contour of said transfer cylinder; and said reversing drum having grippers prescribing a circular periphery of said reversing drum, and said reversing drum having an outer contour located within said circular periphery prescribed by said grippers of said reversing drum for transporting the sheet on said reversing drum at a distance from said outer contour of said reversing drum.