Dampening system for offset printing unit of web-fed printing machine, has outer covering element assigned to covers viewed in axial direction of distributor roller, to adjust dampening agent amount depending on print substrate format

摘要

The system (10) has a storage container for storing a dampening agent (12), and a removing device for removing the dampening agent from the container and for applying the agent on a dampening distributor roller (14). An outer covering element is assigned to outer covers (18) viewed in an axial direction of the dampening distributor roller, to automatically and format-variably adjust the dampening agent amount applied at external edges of the dampening distributor roller depending on a print substrate format.