Rotational body configuration for web width correction

A rotary printing machine arrangement, comprising:

• an upstream printing nip;
• a downstream printing nip;
• a web passing through an upstream printing nip and a downstream printing nip and being printed in sequence;
• a rotational body configuration for web width correction between said upstream printing nip and said downstream printing nip, said rotational body configuration being arranged on one side of said web rotatable in a running direction of said web, said rotational body having radially protruding portions and radially recessed portions, said radially protruding portions alternating with said radially recessed portions in an axial direction of said rotational body, said radially protruding portions and said radially recessed portions deforming said web in a wave-like manner transversely to said running direction with said web winding partially around said rotational body configuration protruding portions and said web winding partially around said rotational body recessed portions by one of arranging said rotational body configuration in a path of said web between said upstream printing nip and said downstream printing nip or guiding said web to position said web path relative to said rotational body configuration between said upstream printing nip and said downstream printing nip, wherein said rotational body configuration is used in another printing production as a deflector roll for a web entering said downstream printing nip or leaving said upstream printing nip and not passing through the other said nip, respectively.

A rotary printing machine arrangement, comprising:

• an upstream printing nip;
• a downstream printing nip;
• a web passing through said upstream printing nip and said downstream printing nip and being printed in sequence;
• a rotational body configuration for web width correction between said upstream printing nip and said downstream printing nip, said rotational body configuration being arranged on one side of said web rotatable in a running direction of said web, said rotational body configuration having radially protruding portions and radially recessed portions with said radially protruding portions alternating with said radially recessed portions in an axial direction of said rotational body and defining a sinusoidally varying surface with said radially protruding portions and radially recessed portions running sinusoidal in said axial direction, said radially protruding portions and said radially recessed portions deforming said web in a wave-like manner transversely to said running direction with said web winding partially around said rotational body configuration protruding portions and said web winding partially around said rotational body recessed portions by one of arranging said rotational body configuration in a path of said web between said upstream printing nip and said downstream printing nip or guiding said web to position said web path relative to said rotational body configuration between said upstream printing nip and said downstream printing nip, whereby said rotational body configuration imposes the wave-like deformation without a second intermeshing rotational body and deflects the web between said upstream printing nip and said downstream printing nip with said wave-like deformation being imposed only by the partial winding around said rotational body configuration.