Abstract: Intaglio printing cylinder, comprising a core of a virtually undeformable material and a multilayer sleeve joined releasably thereto. The new intaglio printing cylinder especially is more durable than prior cylinders of a similar type, and it is interchangeable with conventional solid metal intaglio printing cylinders. The new intaglio printing cylinder is characterized by the fact that on the outside of the first, inner layer of the sleeve a plurality of ribs projecting outwardly and running substantially in the longitudinal direction of the cylinder are disposed. This intaglio printing cylinder has an improved stability, especially against circumferential shifting or displacement within the sleeve and thus is more durable. An additional improvement of its working characteristics is achieved by a continuous electrical continuity from the core to the outer copper layer. The new intaglio printing cylinder is especially suitable as a substitute for the solid metal printing cylinders still in use.

Abstract: Disclosed is a rotogravure cylinder having a core and a sleeve detachably joined to the core, with the core being substantially solid and formed of a metal. The core is provided with passages for passing compressed air to the outer surface thereof. The sleeve is adapted to be fitted onto the core and removed therefrom with the aid of an air cushion produced by the compressed air. The sleeve consists of at least three concentric layers. The inner layer is formed of a material of low elasticity, and is slightly compressible. The center layer is formed of a rigid and inherently stable material, the inner and/or the center layer each may be varied in their thickness. The outer layer comprises a copper layer.