Abstract:
After ink remaining on an ink supply roller (R) for applying ink onto a plate cylinder is softened by a solvent, a washing cloth (4) is brought into pressure contact with the ink supply roller and is moved either intermittently or continuously so as to let the softened ink soak into and be held in an oil absorption layer of the washing cloth. After soaked with ink, the washing cloth is sent into a processing portion (8) and is cut by a cutter (3) or taken up in a predetermined length by a take-up roller and then discarded together with the roller. The washing cloth has at least the oil absorption layer and an oil impermeation layer, has high absorptivity of the softened ink and does not permit leak of the absorbed ink. Particularly in the washing cloth having an oil permeation layer which does not permit the back-flow, the absorbed ink is completely held in the absorption layer and this washing cloth is extremely easy to handle. Furthermore, in the washing cloth which contains an oil coagulant in the absorption layer, the absorbed ink is solidified or gelatinized by cooling after heating, and subsequent processing of the washing cloth becomes simple.
Abstract:
The invention relates to a cleaning device for printing-press cylinders. Said device comprises a sustained-action brake (28, 30, 32, 34, 36, 38) located on a clean-cloth spindle (4) of a cleaning cloth which can be wound from said spindle onto a soiled-cloth spindle. The sustained-action brake has at least one spring-loaded compression spring (32) located in an axial position in relation to the bearing axis, which is pre-stressed axially between a front face (34) that cannot rotate and a front face of the bearing which, together with the clean-cloth spindle (4), can be rotated in relation to the first front face. The compression spring thus generates rotational braking forces on these front faces (34) and/or on other front faces (28, 30), in order to hold the cleaning cloth taut between the two spindles.
Abstract:
The invention relates to a printing machine with at least one integrated device to print a printed form from a printing cylinder. The aim of the invention is to create a printing machine with a compact design. This is achieved by arranging the cylinder groups (11) symmetrically in relation to a horizontal alpha bisecting line (12) of an angle ( alpha ) formed by the connecting lines of the centers of the offset cylinders (9) with the center of the printing cylinder (13).
Abstract:
A novel apparatus and method of a take-up shaft (20) used in the cleaning of a cylinder of a printing press (100). The take-up shaft (20) includes features that allow the securing of a cleaning fabric (52) from a supply roll (50) without the need to physically fix or mount the fabric to the supply roll (50) with screws or other fasteners that could cause the fabric to tear.
Abstract:
The invention relates to a cleaning-cloth roller for cleaning devices used in the cleaning of running printing material lines or cylindrical rotating bodies in a printing machine, or another machine in a printing press. A drive lip (10), for driving the cloth in the direction of rotation, may be extended radially against a spring force, out through a longitudinal slit in a cylinder (4) on which the cloth may be wound. Said lip is extended by means of an inner body (14), which may be inserted inside the cylinder (4). The drive lip (10) gives the cloth roll an inner diameter which is greater then the external diameter (12) of the cylinder (4). The cloth roll may thus be easily removed from the cylinder (4), when the drive lip (10) is withdrawn into the cylinder (4).
Abstract:
A device for cleaning a cylinder of a printing press having a one-piece, rigid frame (10), a fabric supply roll (50) and a take-up shaft (20). The fabric supply roll (50) and the take-up shaft (20) are removably mounted onto the frame (10). The take-up shaft (20) includes an axial groove (24) and a mounted rod (74) for securing the cleaning fabric (52) from the supply roll (50) to the take-up roll (20).
Abstract:
A coating unit is located after a sheet-fed digital printer on a manufacturing line. As a response to a workpiece entering the coating unit from the printer, coating substance is dosed (203) onto a plate cylinder (101), and said plate cylinder (101) is rotated to transfer said coating substance onto the workpiece, which is then transferred further on the manufacturing line. As a response to a first time limit expiring after transferring said workpiece further without a subsequent work- piece entering the coating unit, the rotation of the plate cylinder (101) is stopped.
Abstract:
The invention concerns in general the technology of automatic maintenance operations in printing and package manufacturing machinery. Especially the invention concerns the task of maintaining smooth and reliable operation of a coater that on a manufacturing line comes after a sheet-fed printer. Th invention relates to a cleaning arrangement for a coater that comprises a plate cylinder (101), the cleaning arrangement comprising: a cleaning web (202), a tangential moving mechanism (203, 204) configured to controllably move said cleaning web (202) in at least one direction in a plane defined by said cleaning web (202), a radial moving mechanism (205, 302) configured to controllably move said cleaning web (202) in at least one direction out of said plane, and a controller (501) coupled to said tangential and radial moving mechanisms (203-205, 302), said controller (501) being configured to control the moving of said cleaning web (202) in conformity with input signals received by said controller (501).