METHOD AND ARRANGEMENT FOR THE ANGULAR POSITIONING OF A CONTAINER OR A CONTAINER PREFORM ON A MANDREL INSERTED IN THE NECK THEREOF, AND MANDREL AND CONTAINER ARRANGED FOR THEIR IMPLEMENTATION

摘要

The invention relates to the positioning of a container or a container preform made of thermoplastic material, having a neck (1) with a substantially straight cylindrical internal wall (2), in a predetermined angular position on a mandrel (11) inserted inside said neck (1); the internal wall (2) of the neck (1) or the external wall of the mandrel (11) or the internal wall (2) of the neck (1) respectively comprises at least one substantially radial projection (8) and the external wall (13) of the mandrel or of the neck (11) comprises at least one bearing shoulder (14) turned towards the free end of the mandrel, in order to guide said radial projection, the shoulder (14) extending on the wall while inclined with respect to the axis of the mandrel or of the neck, locking means being further provided to stop the relative motion of the mandrel and the container when the neck of the later is arranged with a predetermined angular orientation with respect to the mandrel.