Rotational body configuration for web width correction

(NEW) An assembly of rotational body configurations, the assembly comprising:

• a first rotational body configuration for web width correction of a web between an upstream printing nip and a downstream printing nip, said first rotational body configuration being arranged on one side of said web rotatable in a running direction of said web, and comprising radially protruding shell portions and radially recessed shell portions, said radially protruding shell portions being alternatingly juxtaposed with said radially recessed shell portions in an axial direction of said rotational body, said radially protruding shell portions and said radially recessed shell portions deforming said web in a wave-like manner transversely to said running direction with said web winding partially around said first rotational body configuration protruding shell portions and winding partially around said first rotational body recessed shell portions by one of arranging said first 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 first rotational body configuration between said upstream printing nip and said downstream printing nip;
• a second rotational body configuration for web width correction between said upstream printing nip and said downstream printing nip, said second rotational body configuration being arranged on one side of said web rotatable in said running direction of said web, and comprising radially protruding shell portions and radially recessed shell portions, said radially protruding shell portions being alternatingly juxtaposed with said radially recessed shell portions in an axial direction, said radially protruding shell portions and said radially recessed shell portions deforming said web in a wave-like manner transversely to said running direction with said web winding partially around said second rotational body configuration protruding shell portions and winding partially around said second rotational body recessed shell portions by one of arranging said second rotational body configuration in said 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 second rotational body configuration between said upstream printing nip and said downstream printing nip;
• and
• swivel-mounts with swivel arms around a common axis, one of said first and second rotational body configurations being optionally swivable into a working position, in which it is wound around in part by said web while the respective other of said rotational body configurations is in a position having no effect on said web, and said protruding shell portions of one of said at least two rotational body configurations in said working position protruding further than said protruding shell portions of the other of said first and second rotational body configurations in its working position relative to said web.