Versatile regulating unit for a stream of containers

A regulating unit for an installation for preparing batches of bottle-type containers, and comprising at least two guiding passages separated by walls for which a distance between said walls is adjustable, each passage being equipped with a conveying module which supports and advances containers to be regulated, said unit achieving regulation of a stream of containers by means of sets of fingers and being placed between an upstream conveyor and a downstream conveyor, wherein said regulating unit comprises, in a region located at each of two ends of said regulating units, between two adjacent walls, means for centering each conveying module, said means consisting of first arms of same length forming a compass between two adjacent walls, said first arms having one end which is hinged onto said adjacent walls, at a same level and on a same horizontal line, and the other ends coming together in a hinge which is integrally attached to said conveying module by means of a sliding connection arranged in a mid-plane of a corresponding passage.