Abstract: An image-carrying plate such as a printing plate, an embossing plate, a die-cutting plate or the like for reproducing the image on a suitable media is mounted on a rotatable cylinder or drum by attaching a removable clamp to each end of the plate and removably attaching the plate clamps respectively to clamp carriers which are circumferentially spaced from one another on the cylinder with the plate at least partially wrapped around the outer surface of the cylinder. At least one clamp carrier on the cylinder can be adjusted to move the associated plate clamp so that the plate is pulled taut against the outer surface of the cylinder.

Abstract: A magnetic cylinder for holding printing plates, embossing plates, die-cutting plates or the like has a plurality of pockets or recesses formed on its outer surface, each of the pockets or recesses containing magnetic elements of permanent bar magnets and interposed pole pieces with the pockets offset circumferentially from one another so that the magnetic holding field will armature with the plate placed on the cylinder at least in part over the entire width and length or breadth of the plate to ensure that the entire plate including the leading and trailing edges are held securely in place while the cylinder rotates.

Abstract: A printing plate or decorator cylinder has a tapered bore for engaging the tapered outer surface of a sleeve member which is mounted on an untapered rotatable cantilevered printing press or decorator drive shaft and the sleeve is adjustably coupled to the shaft to permit axial and circumferential adjustment of the sleeve and the cylinder as needed.

Abstract: A printing plate cylinder has a linear bearing press-fitted into its axial bore with the linear bearing having a ball-bearing surface for engaging a cylindrical rotatable drive shaft to permit axial and circumferential adjustments as needed.

Abstract: A magnetic cylinder for printing plates and the like has a core of low-cost magnetically permeable material with an outer shell of higher cost low magnetic permeability material with magnetic elements resting in cavities or channels formed in the shell.

Abstract: A printing plate or decorator cylinder has a tapered bore for engaging the tapered outer surface of a sleeve member which is mounted on an untapered rotatable cantilevered printing press or decorator drive shaft and the sleeve is adjustably coupled to the shaft to permit axial and circumferential adjustment of the sleeve and the cylinder as needed.

Abstract: A printing plate or decorator cylinder has a tapered bore for engaging the tapered outer surface of a sleeve member which is mounted on an untapered rotatable drive shaft and the sleeve is adjustably coupled to the shaft to permit accurate registration of the printed indicia when a printing plate is changed.

Abstract: A magnetic cylinder for printing plates and the like has an air manifold within the body of the cylinder for applying the force of pressurized air against the plate when mounting the plate onto the cylinder to enable the plate to be accurately registered on the cylinder before it is magnetically latched onto the cylinder.

Abstract: A printing plate cylinder having a hollow cylindrical bore is mounted to a tapered rotatable drive shalt by an adapter having a tapered bore for engaging the drive shalt and a cylindirical outer surface with a flange having guide pins for mating with linear bearings mounted on the printing plate cylinder.

Abstract: In a magnetic cylinder for holding printing plates and the like in which magnetic elements are located and held in place in recesses formed on the outer surface of the cylinder, a thin substantially non-magnetic foraminate layer is located at the bottom of the recesses and the magnetic elements rest against the foraminate layer.

Abstract: A magnetic cylinder for use in printing or die cutting has annular spaced-apart pole pieces with flexible or pliable annular magnets in the spaces between the pole pieces, a protective covering over the magnets and supports alongside the magnets for structurally supporting the protective covering.