Packaging unit for producing sealed packages of pourable food products from a tube of packaging material

摘要

There is described a unit (1, 1') for producing sealed packages of a pourable food product from a tube (2) of packaging material; the unit (1) has two forming members (20) movable cyclically between a first position, in which they cooperate with the tube (2) to control the volume of the packages being formed, and a second position, in which they are detached from the tube (2); the forming members (20) are pushed by elastic force to perform an operating stroke from one of the first and second positions to the other of the first and second positions; and the unit (1, 1') has retaining means (25, 25'), which cooperate with the forming members (20) during the operating stroke to oppose the elastic force and reduce dynamic stress at the end of the operating stroke.