Patent ID: 7322917
Filing Date: 2008-01-29
Classification: B31F

Abstract:
1. A rotating cylinder for processing a web material, comprising an essentially rigid cylindrical core on which is fitted an interchangeable sleeve of elastically expandable material whose rigidity is less than that of material of the core, said sleeve being axially and angularly fixable to said core and being provided on an outer surface thereof with a relief pattern, wherein, at each end of the cylinder, at least one corresponding mechanical locking member is present which can be fixed to a corresponding end of the core of the cylinder and which interacts with a corresponding end of the interchangeable sleeve to lock said interchangeable sleeve angularly with respect to the core of the cylinder, wherein each said mechanical locking member comprises a bracket which fits onto an end face of the cylinder which is provided with at least one appendage extending onto a cylindrical surface of the cylinder and engages the interchangeable sleeve, wherein said interchangeable sleeve is formed from two coaxial cylindrical components fixed rigidly to each other, an inner cylindrical component thereof having an inner surface for connection to a surface of said core and an outer cylindrical component having said embossing pattern on an outer surface thereof, and wherein said interchangeable sleeve comprises, at each end, an essentially rigid ring, within which is formed one or more recesses for one or more of said at least one appendage.