| 摘要 |
PURPOSE:To prevent the clogging of nozzle tip despite long-time coating by ejecting liquid from the central part of a suction nozzle which sucks coating liquid to the coated thick film part and sucking this liquid together with the coating liquid of the coated thick film part. CONSTITUTION:An opening 2 for suction is diametrally opposed to the thick film part 11 at the edge of the coated matter coated on a substrate 12 and a suction nozzle 1b is fixed to the position in contact with the coating liquid, thence the rear end of a liquid ejection nozzle 4 and the storage vessel for the liquid to be supplied are connected to the discharge port of a pump by means of conduit. An opening 3 for discharge is connected to a pressure reducing device. When the liquid is sucked from the opening 3 for discharge while warm water is being supplied to the nozzle 4, the coating liquid of the thick film part 11 of the coated part moving just before the opening 2 for suction is sucked together with the warm water which is being ejected, through the opening 2 for suction, whereby the coating liquid of the thick film part 11 of the coated edge is removed. It is equally well to connect the nozzle 4 simply to a warm water tank by means of a conduit. |
