Abstract:
A system and method of a combination and sequencing of a first cleaner around a blanket cylinder, a second cleaner around one of the rollers in an ink form roller assembly, and a fluid applicator around another one of the rollers in the ink form roller assembly effectively clean the press rollers and the blanket cylinder used in a printing machine.
Abstract:
Method and apparatus for cleaning a rubber coated cylinder (10) mounted in an offset printing machine for transferring the print from a printing plate cylinder (11) to a paper web (12) running in contact with the rubber coated cylinder, while the offset printing machine is running. The surface of the rubber coated cylinder is brushed by means of a brush (16) which extends in parallel with the cylinder and has substantially the length thereof and which is engaged with the rubber coating and imparted an axially reciprocating movement for loosening the contaminants and distribution thereof over the surface of the cylinder. Washing liquid is sprayed onto the surface of the rubber coated cylinder from a ramp (14) mounted in parallel with the cylinder and having a number of spray nozzles distributed along the ramp for dissolving the contaminants. Washing liquid and contaminants are removed from the surface of the cylinder by means of the paper web running through the offset printing machine.
Abstract:
A blanket cylinder washing method for use in a web offset printing press. A blanket cylinder is rotated independently of running of a web, with the blanket cylinder thrown off, preferably, the blanket cylinder is rotated at a speed V1 higher than a running speed V0 of the web, and the blanket cylinder is washed. It is thereby possible to decrease the amount of spoilage generated when the blanket cylinder is washed.
Abstract:
A device for cleaning a cylinder in a printing press, having a cleaner engageable and disengageable with the cylinder, the cleaner being disposed in a housing formed with an opening, includes a device for closing the opening of the housing, the closing device being actuatable for moving the housing relative to a covering so as to bring the opening of the housing into alignment with the covering.
Abstract:
A cleaning device for cylinders of printing presses, having at least one wash roll engageable with and disengageable from the cylinders, the wash roll being formed as a brush roll and being sprayable with cleaning fluid, includes straight bristles and wavy bristles arrayed on the brush roll.
Abstract:
A device for cleaning cylinder surfaces in printing presses uses a cleaning cloth. The cleaning cloth extends over the length of the cylinder surface. The cleaning cloth is guided by an application element and is placed in contact with the cylinder surface to be cleaned by the application element. A drive mechanism moves the cleaning cloth through a washing device to remove the adhering dirt particles from the cleaning cloth.
Abstract:
A cylinder cleaning apparatus for a printing press includes a cleaning cloth, a plate, and a cylinder and a rod. The cleaning cloth is brought into contact with the circumferential surface of a blanket cylinder to wipe a foreign matter on the circumferential surface of the blanket cylinder. The plate is arranged to oppose the circumferential surface of the blanket cylinder through the cleaning cloth, is deformed in accordance with a radius of curvature of the circumferential surface of the blanket cylinder, and has a reaction force against the circumferential surface of the blanket cylinder. The cylinder and the rod press the plate against the circumferential surface of the blanket cylinder, thereby bringing the cleaning cloth into contact with the circumferential surface of the blanket cylinder at a predetermined contact pressure.
Abstract:
A printing machine spray device for moistening surfaces of cylinders, rolls, rollers which are rotating around a transverse axis of the machine and/or for moistening the material being printed which is moving in the longitudinal direction of the machine. The liquid is sprayed by two sprayers onto the surface to be moistened while the two sprayers are being moved in respective opposite directions transversely over the surface. Each sprayer starts from a different respective longitudinal side of the machine. Controls determine the on-off delivery of spray, the speed of sprayer motion, the starting positions of each of the sprayers and may adjust these for machine parameters. Automatic dosing of a specific quantity during one spraying is provided. The input to a sprayer may be from one of selected sources.
Abstract:
A method of cleaning a cylinder of a printing machine comprises the steps of pressing a cleaning cloth onto the outer peripheral surface of the cylinder while the cylinder is rotating; forwardly feeding the cleaning cloth so as to wipe off contaminant on the outer peripheral surface of the cylinder; and partially feeding backwardly the portion of the cleaning cloth which has been fed forwardly during the preceding cleaning operation, before the next cleaning operation is started, whereby the portion of the cleaning cloth is partially used again for the cleaning in the next cleaning operation. The apparatus comprises a continuous cleaning cloth stretched between a cleaning cloth supply device and a cleaning cloth take-up roll rotatably supported by side plates, a take-up mechanism for rotating the cleaning cloth take-up roll so as to take-up the cleaning cloth; pressing device for selectively pressing the cleaning cloth into contact with the outer peripheral surface of the cylinder; and backward feeding device for backwardly feeding part of the cleaning cloth taken-up by the cleaning cloth take-up roll during preceding cleaning operation towards the cleaning cloth supply device after completion of the preceding cleaning operation.
Abstract:
A washing device formed as an insert unit on a printing machine for cleaning the outer cylindrical surface of rollers or cylinders includes a washcloth supply roll and a dirty-washcloth take-up roll for a washcloth, a device for saturating the washcloth with washing medium, a device for withdrawing the washcloth from the supply roll by winding the washing device on the take-up roll via an actuable pressure applicator, so that, during a washing operation, the pressure applicator presses the washcloth against a roller or cylinder, the take-up roll being connectible with a feeder device fixed to the machine, the washing device being automatically connectible with a roll-sensing device fixed to the machine when it is slid as an insert unit into position in the machine, an upwardly exposed washcloth section, in the slid-in position, being disposed upstream of a membrane member, as viewed in transport direction of the washcloth, the washcloth section being located beneath a washing-medium dispenser device fixed to the machine and extending along an elongated side of the washing device.