This page briefly covers the process of bending neon tubes. Here the glass tubes are being heated and bent with a skillful hand.
Tube bending is considered an art that takes a long period of frustrating hard work to master.
On the left we have a burner that is useful for making large bends. The burner on the right is typically used for tight bends or joining two tubes together. Now that the tube is hot, it is ready to be bent to the desired shape. The tube has been shaped into its final form. Now the air inside it is evacuated and neon or argon gas is injected.