Vertical packaging machine for packaging products and associated method

A method for introducing a product inside a package formed by a forming element of a vertical packaging machine, the forming element having an upper mouth, the vertical packaging machine further including a hopper having an upper mouth through which the product to be packaged is introduced, at least a portion of the hopper is arranged above and aligned with the forming element, at least the hopper and the forming element forming a vertical supply conduit through which the product to be packaged falls, the method comprising;

• introducing the product in the upper mouth of the hopper so that the product moves in a forward downward direction toward the forming element;
• injecting a gaseous fluid into the supply conduit, the gaseous fluid being directed to the supply conduit by a distributor that includes at least one inlet mouth through which the gaseous fluid enters the distributor and at least one outlet mouth made in the supply conduit, the outlet mouth being in fluid communication with the inlet mouth and arranged at a height above the upper mouth of the forming element and below the upper mouth of the hopper, the outlet mouth being arranged to cause the gaseous fluid to be directed downward into the supply conduit, the inlet mouth has a first flow path area and the outlet mouth has a second flow path area, the second flow path area being smaller than the first flow path area, the gaseous fluid being introduced downward into the supply conduit in a manner that causes air present in the supply conduit above the outlet mouth to be directed towards the upper mouth of the forming element, the injection of the gaseous fluid being for a specific period of time for each product to be packaged in one and the same package such that the gaseous fluid starts to reach the upper mouth of the forming element before all the product to be packaged in one and the same package has passed through the height of the outlet mouth, and finishes reaching the upper mouth of the forming element once all the product has gone through the upper mouth of the forming element.