Rotary distributor for carousel-type hollow-body treatment machine, has orifices sliding past slots such that rates of increase and decrease of surface area of passage are same for all circumferences

摘要

The distributor has a rotary ring (3) with communication orifices (6) and a stationary ring (2) with several slots (7). The orifices and the slots have anterior and posterior ends (11, 12) and are distributed on several concentric circumferences (9) of different diameters. The orifices and slots are shaped in a way such that when the orifices slide past the respective slots in the stationary ring, the rates at which the surface area of passage (13) defined by each orifice and the associated slot increase upon opening and decrease upon closing, are the same for all the circumferences.