Abstract: An inking system is provided for flowing ink on the surface of an inking cylinder in a manner that simply confines ink to the working surface of the cylinder without splatter or interference with the cylinder drive system. Thus an ink doctoring chamber is located adjacent the cylinder with a cylinder hugging chamber wall establishing an ink bearing gap over a segment of the cylinder and along its length except adjacent ink free cylinder ends. The ink doctoring chamber has a ramp sloping downwardly to maintaining the ink flow pressure within the confines of the cylinder and away from the cylinder ends. The ink flow gap is terminated at a replaceable flexible planar doctor blade slightly bent to frictionally hold it in place. Thus a simplified circulating ink flow system is provided that need not be sealed off to prevent ink splash or creepage into the printer drive system.

Abstract: A rotary machine for printing or otherwise applying ink or other liquidous composition to a rotary receiving roll carried by a frame and having a longitudinal rotational axis and a peripheral surface. One or more doctor blades having a doctoring edge(s) contact the roll peripheral surface. A blade support for the doctor blade includes or is connected to an aligning member having a registration surface which is held in closely confronting or directly contacting relationship with a portion of the peripheral surface and/or with a portion of a projecting member which projects from the roll. The registration surface has a connection with the doctor blade holder for maintaining a substantially fixed radial distance relationship between the holder and the rotational axis of the roll.