Traitement en cours

Veuillez attendre...

Paramétrages

Paramétrages

Aller à Demande

1. WO2020108944 - PROCÉDÉ ET APPAREIL D'EMBALLAGE PERMETTANT DE FORMER DES EMBALLAGES SCELLÉS PARTIELLEMENT REMPLIS

Note: Texte fondé sur des processus automatiques de reconnaissance optique de caractères. Seule la version PDF a une valeur juridique

[ EN ]

CLAIMS

1.- A method for forming sealed partially-filled packages (2) filled with a pourable product comprising at least the steps of:

forming a tube (3) from a web (4) of packaging material ;

- filling the pourable product into the tube (3) for forming a product column (8) within the tube (3);

- directing a sterile gas into the product column (8) for forming and/or maintaining a gas cushion (10) within the product column (8);

- forming and transversally sealing the tube (3), for obtaining the packages (2) containing the pourable product and a gas space (11) formed from a defined volume of the sterile gas originating from the gas cushion (10) .

2.- The method according to claim 1, further comprising the steps of:

- detecting and/or determining an elevation level of the product column (8);

- controlling the pressure of the sterile gas as a function of the elevation level.

3.- The method according to claim 2, wherein during the step of controlling the pressure of the sterile gas, the pressure of the sterile gas is controlled such that the elevation level of the product column (8) remains substantially constant.

4.- The method according to claim 2 or 3, wherein during the step of controlling the pressure of the sterile gas, the pressure and/or flow of the sterile gas is controlled as a function of a size and/or a format of the packages (2) .

5.- The method according to any one of the preceding claims, wherein the step of forming and trasversally sealing the tube (3) comprises the step of transversally sealing the tube (3) through a portion of the gas cushion (10) for obtaining the gas space (11) in the packages (2) .

6.- The method according to any one of the preceding claims, wherein during the step of directing a sterile gas, the pressure and/or flow of the sterile gas is controlled such that the volume of sterile gas present within the packages (2) ranges between 1% to 35 % of an overall inner volume of the packages (2) .

7.- The method according to any one of the preceding claims, wherein during the step of directing, the pressure of the sterile gas within the gas cushion (10) is controlled between 5 kPa to 40 kPa, in particular between 10 kPa to 30 kPa, above ambient pressure.

8.- The method according to any one of the preceding claims, and further comprising at least the step of controlling a pressure of an auxiliary sterile gas acting on the product column (8) .

9.- The method according to claim 8, wherein, in use, a delimiting element (42) is arranged within the tube (3) and is designed to divide the tube (3) into a first space (43) and a second space (44);

wherein the second space (44) contains the product column (8) and during the step of controlling the pressure of the auxiliary sterile gas, the auxiliary sterile gas is directed into a zone of the second space (44) between the delimiting element (42) and the product column (8) .

10.- The method according to any one of the preceding claims, and further comprising at least the steps of:

- advancing the web (4) of packaging material to a tube forming station (6) at which the web (4) of packaging material is formed into the tube (3) ; and

- advancing the tube (3) along a tube advancement path

(Q) .

11.- A packaging apparatus (1) for forming sealed partially-filled packages (2) filled with a pourable product comprising at least:

- a tube forming and sealing device (5) configured to form a tube (3) from a web (4) of packaging material and to longitudinally seal the tube (3) ;

- a filling device (7) adapted to direct, in use, a pourable product into the tube (3) for obtaining a product column (8) within the tube (3);

- a gas feeding device (9) configured to direct a sterile gas into the product column (8) such that, in use, a gas cushion (10) is formed and/or maintained within the product column (8);

a package forming unit (19) for forming and transversally sealing the tube (3) for obtaining the packages (2) filled with the pourable product and containing a gas space containing a defined volume of the sterile gas present within the gas cushion (10) .

12.- The packaging apparatus according to claim 11, wherein the gas feeding device (9) comprises a level detection unit configured to detect and/or determine an elevation level of the product column (8); and

wherein the gas feeding device (9) is configured to control the pressure of the sterile gas as a function of the elevation level.

13.- The packaging apparatus according to claim 11, wherein the gas feeding device (9) is configured to control the pressure of the sterile gas such that the elevation level of the product column (8) remains, in use, substantially constant .

14.- The packaging apparatus according to any one of the claims 11 to 13, wherein the package forming unit (19) is so configured as to transversally seal the tube (3) through a portion of the gas cushion (10) for obtaining the gas space (11) in the packages (2) .

15.- The packaging apparatus according to any one of claims 11 to 14, wherein the gas feeding device (9) is configured to control the pressure of the sterile gas as a function of a size and/or a format of the packages (2) .

16.- The packaging apparatus according to any one of claims 11 to 15, wherein the gas feeding device (9) is configured to control a gas pressure of the sterile gas of the gas cushion (10) to range between 5 kPa to 40 kPa, in particular between 10 kPa to 30 kPa, above ambient pressure.

17.- The packaging apparatus according to any one of claims 11 to 16, and further comprising at least a pressurizing device (41) configured to control an auxiliary pressure of an auxiliary sterile gas acting on the product column ( 8 ) .

18.- The packaging apparatus according to claim 17, and further comprising a delimiting element (42), in use, arranged within the tube (3) for dividing the tube (3) into a first space (43) and a second space (44);

wherein the second space (44) comprises the product column ( 8 ) ; and

wherein the pressurizing device (41) is configured to direct the auxiliary sterile gas into a zone of the second space (44) between the delimiting element (42) and the product column (8) .