APPARATUS FOR THE SEALED INTRODUCTION AND/OR WITHDRAWAL OF BODIES THROUGH AT LEAST ONE APERTURE OF A TREATING CHAMBER WHICH MAY BE UNDER VACUUM

摘要

A seal permitting wire, rod or the like to fed into a chamber at low pressure comprising a Venturi tube constituting in its interior and in succession a convergence a neck and a divergence. The tube has a coaxial sleeve on its convergence side into which the solid to be treated can be introduced. This sleeve is partially engaged inside the Venturi tube over a length determined so as to create a rapid change of section which defines a dynamic joint zone in combination with the pressure, flow and speed of the fluid injected toward the inside of the Venturi tube.