Abstract: A gas wiping die is provided with a predetermined arrangement of cams which act against a flexible lip either directly or through intermediate push rods or the like to adjust the opening of the wiping die orifice. The invention may involve several cam shafts which may be rotated by a so-called stepping motor or motors. The arrangement allows a smooth progression of changes in the opening and camber of the coating die gas orifice slot. Various contours of cam shaft may be provided to provide easily implemented programs of die adjustment, either smoothly or discretely, to adjust for variations in coating conditions or procedure.

Abstract: For stripping sheet metal coated in a galvanizing or vitreous-coating installation directly after the coated sheet has left a bath of molten coating material, both sides of the sheet are blasted with a thin curtain of gas. For this purpose a gas is used which is significantly heavier than air and is recirculated, the gas being for example sulfur hexafluoride or a mixture containing this gas.