<p>The invention device is foreseen with a cylindrical container (1) and cover (5) to be firmly fitted on it by means of four bayonet coupling (6), which bears a lever multiplier to supply to the rack rod (7) a force "n" times stronger than the one applied to the levers (8). The multiplier mechanism is integral with a cylinder (11) which slides inside a housing with cuts (12) fitted in the cover (5) centre to allow a constant compression according to he heap height. The force is transmitted on the waste to compress by means of a piston (9) which is firmly connected with a nut (10) to the lower part of the rack rod (7). <IMAGE></p>
