Method for the fabrication of large capacity glass laboratory containers with a large diameter necks and screwed transfer stoppers

摘要

The method consists of creating, from an existing large diameter screwed stopper, a screwed neck (6) of glass produced from a standard glass cylindrical tube. The cylindrical tube is roughly transformed by centrifugal molding to obtain the screwed neck (6). This is then fixed by welding onto a standard large volume bottle of which the standard neck has been previously removed. The screwed stopper is then transformed by cutting its bottom to create an opening (39) that allows the passage of a stainless steel transfer device.