The present invention discloses an improved vehicle wheel rolling carving device, consisting of a left impressing system, a right impressing system, a lower synchronous clamping driving system, a left support system, a right support system, an upper synchronous clamping driving system and the like. The lower synchronous clamping driving system enables a vehicle wheel to rotate under the clamped state, the left support system moves towards the right, the right support system moves towards the left and thus left and right support rolls contact the rotating vehicle wheel; meanwhile, the upper synchronous clamping driving system enables two shafts II and two shafts III to clamp the wheel and apply auxiliary clamping forces to drive the vehicle wheel to rotate; and after the left and the right impressing system rise to different heights, impression carving can be performed on different positions of a back cavity of the vehicle wheel.

A printing cylinder assembly for a printing machine includes a rotating shaft pivotally supported at one axial end shaft section thereof in a cantilever structure, and a sleeve cylinder removably mounted on the rotating shaft so that the cylinder can be fitted on and extracted from the rotating shaft from the other axial end side of the rotating shaft. The rotating shaft is formed at one axial end side thereof with a sleeve cylinder supporting tapered surface, and the sleeve cylinder is formed at one axial end side of an inner diameter portion thereof with a tapered surface, whereby the tapered surface of the sleeve cylinder can be fitted on and in close contact with the sleeve cylinder supporting tapered surface of the rotating shaft and thereby detachably coupling one axial end portion of the sleeve cylinder with one axial end portion of the rotating shaft.

A printing cylinder assembly for a printing machine includes a rotating shaft pivotally supported at one axial end shaft section thereof in a cantilever structure, and a sleeve cylinder removably mounted on the rotating shaft so that the cylinder can be fitted on and extracted from the rotating shaft from the other axial end side of the rotating shaft. The rotating shaft is formed at one axial end side thereof with a sleeve cylinder supporting tapered surface, and the sleeve cylinder is formed at one axial end side of an inner diameter portion thereof with a tapered surface, whereby the tapered surface of the sleeve cylinder can be fitted on and in close contact with the sleeve cylinder supporting tapered surface of the rotating shaft and thereby detachably coupling one axial end portion of the sleeve cylinder with one axial end portion of the rotating shaft.

Variable format offset printing machine having a central impression cylinder The printing machine comprises a central impression cylinder (1) on which a web printable substrate (B) is supported and a plurality of printing stations arranged around the central impression cylinder (1). Each printing station comprises a blanket cylinder (2) of variable diameter, a plate cylinder (3) of variable diameter, and an offset inking unit (4). Said blanket cylinder (2), plate cylinder (3) and offset inking unit (4) are individually movable between respective withdraw positions and respective multiple working positions for different diameters of the blanket and plate cylinders (2, 3). At least one of said printing stations has the axis of the blanket cylinder (2) and the axis of the plate cylinder (3) comprised in an inclined first plane (P1) which does not comprise the axis of the central impression cylinder (1) at any of said multiple working positions for different diameters of the blanket and plate cylinders (2, 3).

Variable format offset printing machine having a central impression cylinder The printing machine comprises a central impression cylinder (1) on which a web printable substrate (B) is supported and a plurality of printing stations arranged around the central impression cylinder (1). Each printing station comprises a blanket cylinder (2) of variable diameter, a plate cylinder (3) of variable diameter, and an offset inking unit (4). Said blanket cylinder (2), plate cylinder (3) and offset inking unit (4) are individually movable between respective withdraw positions and respective multiple working positions for different diameters of the blanket and plate cylinders (2, 3). At least one of said printing stations has the axis of the blanket cylinder (2) and the axis of the plate cylinder (3) comprised in an inclined first plane (P1) which does not comprise the axis of the central impression cylinder (1) at any of said multiple working positions for different diameters of the blanket and plate cylinders (2, 3).

The rotogravure cylinder comprising a rotary gravure base and thereon a copper engraving layer contains a zinc layer between a gravure base and a layer package suitable for engraving and printing. This layer package for instance can comprise a metallic support layer, a copper engraving layer and suitably a protection layer. Deposition of the zinc layer may be tuned for thickness variation, in combination with deposition of the layer package in a fixed thickness.

A printing module of the flexo printing type, is provided with an anilox roller and an impression roller which are set up between two frame parts. Further, the printing module comprises a plate cylinder assembly which is receivable in a plate cylinder holder assembly. The plate cylinder holder assembly is provided with a plate-shaped body part with a supporting ring support surface with a special curve which is symmetrical with respect to a curve plane. Further, each plate cylinder holder assembly comprises a body part support assembly via which the body part is connected with the associated frame part, wherein the body part support assembly is configured for pivoting the body part about a first imaginary pivoting axis and for pivoting the body part about a second imaginary pivoting axis, such as to allow a substantially independent distance setting between the plate cylinder and the anilox roller on one side and between the plate cylinder and the impression roller on the other side.

A printing module of the flexo printing type, is provided with an anilox roller and an impression roller which are set up between two frame parts. Further, the printing module comprises a plate cylinder assembly which is receivable in a plate cylinder holder assembly. The plate cylinder holder assembly is provided with a plate-shaped body part with a supporting ring support surface with a special curve which is symmetrical with respect to a curve plane. Further, each plate cylinder holder assembly comprises a body part support assembly via which the body part is connected with the associated frame part, wherein the body part support assembly is configured for pivoting the body part about a first imaginary pivoting axis and for pivoting the body part about a second imaginary pivoting axis, such as to allow a substantially independent distance setting between the plate cylinder and the anilox roller on one side and between the plate cylinder and the impression roller on the other side.

Methods and systems for flexographic printing are described and include curing of material to be printed while the material is in contact with both a feature of a flexographic printing plate and a recipient substrate. The systems and method are useful in preventing slippage between the feature and the recipient substrate, and are particularly useful when printing at high resolution.

Methods and systems for flexographic printing are described and include curing of material to be printed while the material is in contact with both a feature of a flexographic printing plate and a recipient substrate. The systems and method are useful in preventing slippage between the feature and the recipient substrate, and are particularly useful when printing at high resolution.