Process and plant for packaging fluid or semi-fluid products in thermoformable synthetic resin containers
AssigneeUnifull S.p.A.
InventorCarlo Aguzzoli
Life of this patent
Estimating the term…
Abstract
A continuous lamina (3) is indexed through a forming station so as to be arranged around a tubular element (14); edges of the lamina (3) are welded together to form an unexpanded envelope (2a) which is then inflated when the envelope (2a) is closed in a die (11) through opposite sides of which said tubular element (14) passes; a container (2) formed by expanding said envelope (2a) is then filled and closed while a following envelope (2a) is being expanded.
Claims14
Process for packaging fluid or semi-fluid products in thermoformable synthetic resin containers each defining an internal chamber, comprising providing around tubular means at least one continuous web of thermoformable synthetic resin, bringing together sections of a die to receive the at least one web between them and thereby to encircle said tubular means with said die having opposite entry and exit sides for said at least one web, and to seal together parts of said at least one web, which parts correspond to outlines of the containers, to define a desired external shape of the containers, forming a chamber in said at least one web by injection of pressurized fluid through said tubular means, filling the container with a product through said tubular means, and sealing the container, wherein said tubular means extends through both of said entry and said exit sides of said die throughout said process.
Plant, suitable for carrying out a process of packaging fluid or semi-fluid products in synthetic resin containers, comprising roll means whereby at least one web of thermoformable synthetic resin is fed, after said roll means a forming station with a die having at least two complementary hollow sections that, move together to, form a cavity defining the external shape of a container and to seal together at least parts of said at least one web, said die having an entry side and an exit side for said at least one web, and encircling a tubular means providing forming means to inject pressurized fluid into said cavity to form a chamber of the container and filling means to introduce a product into the chamber, and sealing means to close the filled container, said tubular means extending in a separation plane of the die, wherein said tubular means is arranged to extend through both said entry side and said exit side throughout said process.
Dependencies are inferred from the claim text.