An apparatus and method for operating a folding machine for a web-fed printing press is disclosed. The folding machine includes a cutting blade cylinder operable with a folding blade cylinder and a folding jaw cylinder. A drive is connected to the cutting blade cylinder. The drive is operable in a non-uniform manner in a collecting mode of the folding machine to supply a first and a second exemplar of different sheet lengths and is operable in a uniform manner in a non-collecting mode of the folding machine.

 
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> Method for reducing register errors on a web of material moving through the printing nip of a multicolor web-fed rotary press and corresponding devices

> Printing unit of a printing press and method for carrying out a printing-plate change on a forme cylinder of a printing unit
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