1. fixed oil pan and oil cup most printing machines, especially large-scale printing machines, generally use a fixed oil pan and oil cup, this type of printing machine mechanical structure is relatively simple but very strong. The printing head is driven in and out by the sliding component, and the shock of the pad head can be avoided inevitably due to the impact caused by the gliding component of the printing head, thereby limiting the printing speed of the printing machine. Print head 2. activities of the oil pan and oil cup oil pan and oil cup activities only move up and down, there is no mechanical impact, printing head vibration is reduced, therefore, most of the high speed printing machine use the oil pan and oil cup. Can be divided into open type oil cup sealing system and the printing process of printing machines, plastic head stroke in two on the system operation the same.