Disclosed is a correction system for an alignment film printing plate, including: a roller and a printing plate mounted as a sleeve outside of the roller, wherein a first end portion of the printing plate is provided thereon with a plurality of columns of buckle groups, and a second end portion of the printing plate is provided thereon with a plurality of columns of slot groups engaged with the buckle groups. The correction system for the alignment film printing plate further includes an image controller used for measuring a deviation value between an actual position and a preset position for printing of an alignment film on a substrate. The correcting system of the alignment film printing plate has a simple structure and is capable of realizing different stretching degrees of an alignment film pattern at different positions on the printing plate, so as to improve a correction effect of the printing plate. As a result, deviation can be reduced between an actual position and a preset position for printing of the alignment film on the substrate, without significant increase in costs.

A plate cylinder includes a plate cylinder body having a longitudinally-extending first hole and a longitudinally extending plate-receiving gap connected to the first hole, the plate cylinder body having a longitudinally-extending second hole parallel to the first hole; and a lock-up mechanism including: a torsion bar extending in the longitudinally extending hole and having a surface for contacting an end of a plate located in the gap; a swing bar extending longitudinally in the second hole and being movable perpendicular to a longitudinal direction due to the second hole being oversized compared to dimensions of the swing bar within the second hole; a lever connecting the swing bar and the torsion bar, the torsion bar being rotatable as the swing bar moves within the second hole; and an activator for rotating the torsion bar. A printing press and methods are also provided.

The present invention relates to an apparatus for mounting a flexible plate onto a print sleeve or cylinder, wherein the apparatus comprises at least two manipulator units located below the print sleeve or cylinder and support members provided on each manipulator unit, wherein each support member has a curved profile for arching the flexible plate prior to its mounting onto the print sleeve or cylinder

A web processing system which includes two rollers configured to rotate at the same phase while being in contact with a web which continuously exists along a movement passage and a suppressing mechanism for suppressing a tension variation of the web between the two rollers.

For a flexographic printing apparatus, an apparatus (1) and method for mounting a printing plate (2) on a printing cylinder (4) or a printing sleeve including a system for pre-alignment (5, 8) of a printing plate (2) and real-time alignment (5, 8) of the printing plate (2) during mounting.

A plate cylinder enables a printing plate to be attached thereto and is improved in strength. A plate cylinder is attached to a rotationally driven plate driving shaft, and is configured to mount a cylindrical printing plate attached thereon from a tip end side thereof. The plate cylinder is provided with a plate cylinder main body having a plate mounting surface to which the printing plate is attached. A flat portion is formed on a flat surface positioned further toward a radially inner side than the plate mounting surface. A plurality of hole portions is formed side by side in an axially separated state in the flat portion. A plurality of plate fixing members tightly fixes the printing plate to the plate mounting surface. The plate fixing members are fitted into the hole portions, and are provided to be movable in radially inward and outward directions of the plate cylinder.

The present invention relates to a feeding assembly (1) for automatically loading a flexographic plate (5) in a treatment station (7). The assembly according to the invention comprises a punching unit of said plate (5), handling means (5) for moving the flexographic plate from a loading surface to said punching unit and from said punching unit to a housing site in which a pin bar (14) which can be connected to said plate (5) is arranged. According to the invention, the handling means are configured to connect the plate (5) to said bar automatically and to move the bar, at the end of such a connection, to a predetermined position in which it can be coupled to a treatment system (77) of said treatment station.

A stopper for assuredly preventing shifting of a cylindrical printing plate mounted on a plate cylinder is provided. A plate cylinder 1 has a plate-mounting surface 12 on which a cylindrical printing plate 3 is fitted from the front end side and mounted. A front stopper 4 is provided on the end portion of the front end side. The front stopper 4 is configured so as to be able to switch between a protruding orientation in which at least a portion of the stopper is positioned so as to protrude to the outside of the plate-mounting surface 12 in the radial direction and a retracted orientation in which the entire stopper is positioned to the inside of the plate-mounting surface 12 in the radial direction.

A device for mounting a roller cover on a roller with a pair of tensioning rails has a plurality of identical tensioning units, which are arranged on a common pivoting beam and the partial rails of which jointly form the second tensioning rail of the tensioning rail pair, wherein said tensioning units respectively comprise a first lock assigned to the first tensioning rail and a second lock assigned to the respective partial rail, and wherein the locks selectively hold or release the roller cover.

Techniques are disclosed for connecting a printing plate to a print cylinder or surface. The techniques may be implemented, for instance, with respect to a printing plate, a print cylinder, a print sleeve, or some combination thereof. In an embodiment, a field of mechanical fasteners is provisioned on a printing plate, and a complementary field of mechanical fasteners is provisioned on a print sleeve or cylinder. The mechanical fasteners collectively operate to provide a mechanical bond or interface that inhibits lateral and rotational movement of the plate during printing operations, and can also be configured to manage backlash between engaging surfaces of the interface. In some cases, backlash management includes use of cushion effect integral with the mechanical bond itself and/or unidirectional and possibly angled fastener elements to provide a snugging effect. The mechanical bond may be implemented with hook-and-loop, hook-and-hook, hook-to-channel, male/female-type fittings, vacuum, suction, and/or magnetics.