SHEET COATING DEVICE AND SHEET COATING

PURPOSE: To make it possible to set a high suction packing operation speed and to assure the uniformity of a coating film by providing coating material suction routes from a coating material tank to a piston type fixed delivery pump with positive pressure holding means of the coating material. CONSTITUTION: The coating material is sucked by the piston type fixed delivery pump 2 from a coating material tank 1 through a first liquid feed pipeline 1a and a selector valve 2a. The coating material is supplied through a selector valve 2b and a second liquid feed pipeline 3b to a slit 3a for discharging the coating material of a coating material discharging device 3. A material 8 to be coated is attracted and held by a stage 4 and is coated by nearly intersecting the lower prescribed position of the coating material discharging device 3 with the coating material discharge direction. At this time, the routes 1a, 2a from the coating material tank 1 to the piston type fixed delivery pump 2 are provided with the holding means (pressure regulating valves, release valves, etc.) for holding the coating material at a positive pressure. The generation of cavitation and air bubbles is then prevented and the high uniformity of the coating material supply is attained.