Apparatus and method for forming a hermetic package for creamy products

Abstract

A method for forming a package for creamy products including the following steps: the formation of a tray starting from a first piece of wrapping material in such a way as to form a base and a continuous perimeter edge perpendicular to the base; dosing a predetermined quantity of creamy product into the tray formed; forming a lid for closing the upper opening of the tray starting from a second piece of wrapping material and positioning the lid formed in contact with the creamy product; the second piece has a surface for covering the creamy product and a raised perimeter edge extending from the covering surface and positioned to face the perimeter edge of the tray; a sealing of the package by sealing the lid to the tray obtained by partial sealing of the perimeter edges placed side by side of the tray and of the lid to the tray in such a way as to define at least a first perimeter zone of the edges sealed together and at least a second perimeter zone of the edges which are not sealed and communicating with the creamy product contained in the tray; a folding of the facing perimeter edges on the covering surface of the lid; a subsequent step of expelling any air present in the tray by pressing on the creamy product contained in the tray; and lastly a complete sealing of the folded perimeter edges in such a way as to define a complete sealing of the package obtained.