DE1471868

In apparatus for producing glass sheet by drawing upwardly from a bath of molten glass and then passing round a bending roll, a cooler for the roll is provided located between the roll and the bath and formed by a hollow shell through which a cooling fluid is circulated. The cooler comprises a shell 35, which may be coated with a dark-coloured heat-resistant material, having a flat bottom, a front wall 37, a taller rear wall 38, and a top having a flat section 40 joined to the wall 37 and merging into an arcuate section 41 joined to the wall 38. A shell 42 of similar shape is mounted inside and spaced apart from the shell 35, but the rear and upper walls are not joined so as to leave a slot 75. Mounted inside the inner shell and spaced from the walls is a tube 67 of rectangular cross-section in communication with a water-supply pipe 91 passing through the end walls 64, 43 of the inner and outer shells, apertures in the tube permitting water to pass into the inner shell and thence through the slot 75 into the outer shell. A U-shaped baffle 52 is mounted in the outer shell outside the wall of the inner shell and extends from the base to the height of the flat section 40 of the top and communicates with the outlet pipe 92. A film-forming material is sprayed on to the hot glass before it reaches the deflecting roller from a perforated tube 101 in the wall 37.