Our Machine Drawn Glass is made according the Fourcault principle. The Belgian Émile Fourcault invented a manufacturing process in which glass could be drawn directly from the tank at the working end of the furnace. The débiteuse, a boat-shaped slotted block made of refractory material, is pushed down into the molten glass.
As the hot extruded glass rises through the slot it is grasped by the iron bait. The cooled glass then adheres to the bait and is pulled upward between water-cooled tubes, during which time it anneals. When it reaches the top of the machine, it is cut by automatic cutters.