Tube perforator

Abstract

A tube perforating device for forming outlet openings in a tube, such as a plastic tube, having discharge openings for passage of air, or the like, where it is desired to diminish the sound of the discharge to a minimum, and the method of accomplishing such opening formations by multiple perforations with perforating members spaced as desired and having ovoid heads to permit perforations of the walls of the tube and withdrawing the head of the perforating means through the perforations, drawing the peripheral margins of the opening outwardly, leaving the inside wall of the tube smooth, thus diminishing turbulance therein, and said device having an adjustment permitting a selective penetration of both walls of the tubing, transversely, with just the point of the penetrating means perforating the bottom wall, forcing said peripheral margin outwardly on the bottom perforation, and withdrawing the said head through the upper wall penetration, again moving the peripheral margin outwardly, providing pairs of openings without adding restrictions in the inside of the tubing and thus maintaining the discharge at a minimum of sound.

Dependencies are inferred from the claim text.