ES399258A3 - A procedure of packaging under film tensa of products that can adopt unique or irregular forms. (Machine-translation by Google Translate, not legally binding) - Google Patents

Abstract

A method of packaging under a tense film, of products that can adopt unequal or irregular shapes, being of which the packaging is made in vacuum and where at least one of the components thereof is a thermoplastic film, is essentially characterized by comprising the following steps: a) positioning of the product to be packaged on a lower packing element, whose upper surface is capable of hot welding to a thermoplastic film b) positioning of the product and this lower packing element, in a receptacle opened on its face upper, capable of contacting a second receptacle opened by its lower face, forming a hermetically closed chamber c) arrangement of the thermoplastic sheet on the access mouth to the upper receptacle, arranged on the underside thereof d) situation of a receptacle in contact with the other, thus constituting the hermetic chamber e) submission of said c chamber at a reduced pressure by means of a vacuum source or equivalent f) heating of the thermoplastic film, to bring it to a state of softening suitable for the wrapping g) displacement of the product together with its lower packing element, with respect to the thermoplastic film, in order to force it to adapt on the product, until the edges of said film contact the lower packing element h) interruption in the vacuum communication to the chamber first in its upper zone and then in the lower one, leaving it at atmospheric pressure, so the film has just adapted to the product and welded to the lower packing element (Machine-translation by Google Translate, not legally binding)