Method and apparatus for applying releasing agent to glass plate

Abstract

The invention relates to the application of a releasing agent to a surface of a glass plate which is to be subsequently bent in a heated state together with another glass plate thereon. The glass plate is held in a standing posture, and hot air is blown perpendicularly against a surface of the glass plate, and simultaneously an aqueous solution of a releasing agent is sprayed from a plurality of spray nozzles into a space in front of the glass plate surface such that the sprayed solution mixes with the hot air before arriving at the glass plate surface. In an embodiment the spray nozzles are directed parallel to the glass plate or obliquely so as to make a small acute angle with the glass plate and arranged such that the hot air forces droplets of the sprayed solution to move toward the glass plate surface together with the hot air. In another embodiment the spray nozzles are directed perpendicularly toward the glass plate and arranged such that the sprayed solution soon mixes with the hot air. In either case coating of the glass plate surface with the releasing agent and drying of the coating are efficiently accomplished with little possibility of a fall of foreign matter onto the glass plate surface under treatment.