Apparatus for perforating corrugated tubing at high speeds

摘要

Apparatus for perforating corrugated tubing of large diameter is achieved by use of multiple cutters disposed within the threading on the feeder-cutter wheels. The apparatus receives tubing to be perforated along an axial path coincident with the axis of the tubing. A plurality of feeder-cutter wheels drive the tubing through the apparatus and concurrently perforate the tubing in the valley of its corrugations by virtue of a plurality of cutters disposed within the threading. These multiple cutters allow perforation of larger diameter tubing in the range of nine to twelve inches. Each feeder-cutter wheel, and the drive shaft each wheel is mounted upon, is offset at an angle relative to the axial path, this angulation facilitating uniform perforations at higher speeds. This design permits the wheels to be interchangeable with different wheels, allowing the apparatus to perforate tubing of different diameters.