Ryobi Limited

Naoki Ikeda

Koji Ishii

Nobuyoshi Shibata

A wiper 14 is arranged at a position so as to press to both a side surface 2M of a water fountain roller 2 and a side surface 3M of a metering roller 3. The dampening solution 10 adhered on the side surface 2M and 3M can be scraped off from the side surfaces by the wiper 14. Further, surplus dampening solution 10 stored in a groove 5 formed between the rollers is guided into a water fountain 4. The wiper 14 is made of an elastic body having water retention. So that, lubrication is expected when the dampening solution 10 is absorbed in the wiper 14. Other grooves are formed on the wiper 14 along with edges of a bracket 27 and a bracket 28.

Dampending device for a printing machine

An offset printing press comprises a plate cylinder onto which a printing plate is attached, a form dampening roller having an elasticity on its outer surface, a water fountain roller immersed into water in a water pan, and intermediate roller means for transferring the water from the water fountain roller to the form dampening roller. The intermediate roller means comprises a water oscillating roller which has a hydrophilic property on its outer surface and is capable of reciprocating in its axial direction with contacting the form dampening roller. Also, the offset printing press comprises first moving means for moving the form dampening roller close to and away from the plate cylinder; and second moving means for moving at least one of the water oscillating roller and the form dampening roller so that these two rollers can be moved close to and away from each other.

Offset printing press

A sheet feeder in a sheet-fed printing press includes a detector 1 disposed adjacent to a feed portion of a paper feed or transfer cylinder 2 for detecting an improperly fed sheet of paper, and a gripper opening mechanism 6 actuatable for engaging a cam follower 13 to open a gripper 14 to release the improperly fed sheet of paper from the cylinder. A sheet discharge mechanism 16 has a sheet discharge roller 17 movable toward the cylinder for gripping therebetween the released sheet, and a stripper 18 movable toward the cylinder for stripping the improperly fed sheet and discharging it along a paper guide. An actuator 4.5 is connected to the detector for actuating the gripper opening mechanism and moving the sheet discharge roller and the stripper in response to the detection by the detector of the improperly fed sheet of paper.

Sheet feeder for use in sheet-fed printing press

A device for connecting and disconnecting a dampening system B and an inking system A in an offset printing machine. The offset printing machine includes a plate cylinder 7, and the inking system includes an ink applicator roller 10 movable toward and away from the plate cylinder. The ink applicator roller is in rotational contact with an ink delivery roller 19. The ink delivery roller is in rotational contact with an intermediate roller 15 which is movable toward and away from a roller 16 of the dampening system. The ink delivery roller and the intermediate roller are both rotatably supported by a pair of brackets 27,27 pivotally supported to an inking frame 25,25. The ink delivery roller and the intermediate roller are also slidable with respect to the brackets. In accordance with the movement of the ink applicator roller, the ink delivery roller is slidably moved, yet connection and disconnection between the inking and dampening systems is attainable.

Device for connecting and disconnecting dampening system and inking

A mechanism for continuously supplying a dampening medium in an offset printing machine is disclosed. The mechanism includes a dampening medium applicator roller in rotational contact with a master plate on a master cylinder, a dampening medium transfer roller in rotational contact with the applicator roller, a dampening medium distributor roller in rotational contact with the transfer roller, a dipping roller in rotational contact with the distributor roller, and a metering roller in contact with the dipping roller. The applicator roller and the transfer roller have their outer peripheral surfaces provided with elastic material layers.

Mechanism for continuously supplying dampening medium in offset printing

An offset printing press having an operating lever mechanism which is capable of controlling sequential printing operations by manipulating a single operating lever. The offset printing press includes an inking roller system and a dampening roller system. The inking roller system is supported to a first pair of frames, while the dampening roller system is supported to a second pair of frames pivotable relative to the first pair of frames. The operation lever provides pivotal motion of the second pair of frames for selectively applying water to a plate cylinder from the dampening roller system. Further, rollers in the dampening roller system are movable toward and away from each other.

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Fuchu, Japan

Naoki Ikeda