Ink removing system for an offset printing machine

An ink removing system for an offset printing machine utilizes a pair of cleaning tank mounting guides secured to left and right side frame walls of the printing machine having recesses therein facing each other. A cleaning tank is provided with a pair of axially detachable mounting pins projecting symmetrically longitudinally of the cleaning top to opposite sides thereof and engaged within the recesses for rotatably mounting the tank. A cam shaft rotatably supported by the vertical frame walls carries cams operatively engaging bracket mounted adjusting screws functioning as cam followers on the cleaning tank and engaging the periphery of the cams such that rotation of the cam shaft rotates a vertically projecting cleaning blade fixed to the cleaning tank and to edge contact with the periphery of the ink roller for cleaning of the same. Rotation of the cam shaft is limited to high and low can positions corresponding to blade contact with the ink roller and displacement laterally to the side thereof.