Abstract: A washing device for an offset printing press has a blanket cylinder, the washing device being adjustable with respect to the blanket cylinder and including a rotary washing roller having a soft covering and being in frictional driving engagement with the blanket cylinder, a doctor roller having a surface located in engagement with the washing roller, a distributor roller having a firm surface engaging the soft covering of the washing roller at a location upstream of the doctor roller in the rotary direction of the washing roller, means for feeding and controllably applying fresh washing solution to the distributor roller, a collecting vessel located below the doctor roller, and a doctor blade operatively connected with the doctor roller for guiding therefrom into the collecting vessel ink washed off the blanket cylinder with the wash solution, the improvement therein and further comprises a second washing roller in frictional driving engagement with the blanket cylinder, both of the washing rollers being tra

Abstract: Dampening unit for an offset printing machine includes at least one dampening unit roller, a container for dampening medium and a rotatable sprinkler roller disposed mutually adjacent one another, the sprinkler roller includes a shaft, a pair of discs disposed at opposite ends of the shaft and an envelope wettable by dampening medium from the containers and formed of a plurality of means displaceable in a rotary path for throwing onto the dampening-unit roller from a region of an edge of the envelope extending along the length of the sprinkler roller droplets of dampening medium withdrawn from the container, the plurality of throwing means being stressed in tension between the discs and extending parallel to the shaft, and traverse means carrying a plurality of fingers disposed adjacent to and spaced from the discs and having respective edges projecting into the rotary path of the plurality of throwing means.

Abstract: In a washing device for an offset printing press having a blanket cylinder, the washing device being adjustable with respect to the blanket cylinder and including a rotary washing roller having a soft covering and being in frictional driving engagement with and traversible relative to the blanket cylinder, means for wetting the washing roller with wash solution, a collecting vessel underlying the washing roller, a doctor roller having a firm surface located in continuous frictional engagement with the washing roller, a doctor blade abutting the firm surface of the doctor roller for guiding therefrom into the collecting vessel ink washed off the blanket cylinder with the wash solution, and a distributor roller having a firm surface engaging the soft covering of the washing roller at a location behind the doctor roller in the rotary direction of the washing roller, the distributor roller being wettable with fresh wash solution; the means for wetting the washing roller with wash solution including a drip tube mo