Apparatus for producing a ribbon-like glass having a metal oxide coating formed thereon

Claim 1

In an apparatus for producing a ribbon-like glass having a metal oxide coating formed thereon, said apparatus having a spray gun provided opposite to the surface of a ribbon-like glass at a position which is between a point between a ribbon-like glass forming device and an annealing lehr and a point within said annealing lehr and at which position the temperature of the glass ribbon opposed to the spray gun is at least 400*C., said spray gun being adapted to move in the widthwise direction of the glass ribbon, means for supplying a solution of a metal compound to said spray gun, and means for spraying out said solution of metal compound from said spray gun, the improvement comprising a pair of exhaust pipes disposed on both sides of the path of movement of said spray gun, the lower portions of said exhaust pipes having suction openings therein, a discharge device coupled to said exhaust pipes for sucking exhaust gases resulting from the sprayed metal compound solution from the neighborhood of the glass surface through said suction holes, and a plurality of walls depending from said exhaust pipe to near the surface of the glass ribbon and disposed parallel to the axial line of the exhaust pipe and defining fine gaps therebetween extending to said suction openings, the innermost wall situated nearest to the spray gun being shortest, and the walls becoming progressively longer the more rEmote they are from the spray gun.