GAS EJECTING DEVICE INCLUDING ROTARY COMPONENTS FOR COOLING EXTRUDED TUBING

摘要

A device for applying cooling gas in an annular stream to the exterior of a tubing of plastic material as it issues from an extruding machine. The device is of generally annular configuration with stream-forming components thereof in sealed rotatable relation with other components of fixed position through which a cooling gas enters the device. The apparatus is interiorly baffled in an essentially radial direction to establish a radially and axially extending zigzag passageway for movement of the gas therethrough. The apparatus is otherwise constructed to establish uniform conditions in the cooling gas and a distribution of any thickness variation resulting from non-uniform cooling along the length of a roll of collected film.