Abstract: In a method and apparatus for perforating multiwall polymeric cylindrical tubing, a drill head is slidably mounted for reciprocating movement on a support frame between inlet and outlet stations, the drill head having at least one drill for forming an opening in the wall of a length of unperforated tubing. The unperforated tubing is advanced along an axial path and a length thereof positioned in the drill head. The drill head and unperforated tubing are advanced simultaneously from the inlet to the outlet station, in unison and at the same speed, and without clamping the tubing. During this movement, the drill is actuated whereby to form an opening in the tubing material. At the outlet station, the perforated tube material is discharged from the drill head and the drill head is returned to the inlet station receive the next succeeding section of unperforated tubing and repeat the process.

Abstract: In a method and apparatus for perforating multiwall polymeric cylindrical tubing, a drill head is slidably mounted for reciprocating movement on a support frame between inlet and outlet stations, the drill head having at least one drill for forming an opening in the wall of a length of unperforated tubing. The unperforated tubing is advanced along an axial path and a length thereof positioned in the drill head. The drill head and unperforated tubing are advanced simultaneously from the inlet to the outlet station, in unison and at the same speed, and without clamping the tubing. During this movement, the drill is actuated whereby to form an opening in the tubing material. At the outlet station, the perforated tube material is discharged from the drill head and the drill head is returned to the inlet station receive the next succeeding section of unperforated tubing and repeat the process.