Apparatus and process for aseptically packaging food products in presealed pouches
An apparatus for aseptically packaging of a food product in presealed and internally presterilized pouches. The apparatus comprises a filling chamber ( 2 b ) positioned above a sterilization pre-chamber ( 2 a ) of the pouches (S). At an opening ( 9 ) between the filling chamber ( 2 b ) and the sterilization pre-chamber ( 2 a ) there is arranged a widening device ( 17 ) of the pouches (S) which is suitable for holding a pouch (S) in a working position for the filling wherein only a filling end of the pouch is located in the filling chamber ( 2 b ).
1. An apparatus ( 1 ) for aseptically packaging a food product in presealed, internally presterilized pouches (S), comprising a filling chamber ( 2 b ) and a sterilization pre-chamber ( 2 a ) of the pouches (S), devices for cuffing ( 18 ), filling ( 20 ) and sealing ( 19 ) the pouches (S) being arranged in said filling chamber ( 2 b ), a sanitizer distributing device ( 14 ) being arranged in said sterilization pre-chamber ( 2 a ), characterized in that said filling chamber ( 2 b ) is positioned above said sterilization pre-chamber ( 2 a ), said filling chamber ( 2 b ) and said sterilization pre-chamber ( 2 a ) being separated by means of a wall provided with an opening ( 9 ) at which a pouch widening device ( 17 ) is arranged, which is suitable for holding a pouch (S) in a working position for the filling wherein only a filling end of said pouch (S) is located in the filling chamber ( 2 b ).
2. An apparatus according to claim 1 , characterized in that said widening device ( 17 ), in a first configuration thereof, allows the filling end of a pouch (S) to pass through said opening ( 9 ), whereas in a second configuration thereof holds the pouch (S) widened and cooperates therewith in order to substantially obstructing said opening ( 9 ).
3. An apparatus according to claim 1 , characterized in that said widening device ( 17 ) comprises two plates ( 22 , 23 ) which are mobile parallely to each other and arranged at the sides of opening ( 9 ), each being provided, on the side facing said opening ( 9 ). of a semicircular recess ( 24 , 25 ) which houses a widening member for the pouches (S).
4. An apparatus according to claim 3 , characterized in that said widening members are formed of rods ( 26 , 27 ) which are retractile in a suitable housing inside the plates ( 22 , 23 ) and bear, at a free end thereof, a suction cup.
5. An apparatus according to claim 1 , characterized in that in the filling chamber ( 2 b ), next to said opening ( 9 ), there are arranged gripping means ( 15 ) suitable for adjusting the tension of the filling end of the pouches (S).
6. An apparatus according to claim 5 , characterized in that said gripping means ( 15 ) comprise a support on which two pliers members having an adjustable distance, intended for gripping the pouch at two sides thereof, are arranged.
7. An apparatus according to claim 1 , characterized in that in said sterilization pre-chamber ( 2 a ) there are provided transport means ( 10 ) suitable for carrying the pouches from an entrance ( 8 ) of said pre-sterilization pre-chamber ( 2 a ) to a position next to said opening ( 9 ).
8. An apparatus according to claim 1 , characterized in that said sanitizer distributing device ( 14 ) is a spraying or atomizing device.
9. An apparatus according to claim 1 , characterized in that it comprises a separating device ( 6 ) positioned outside said filling chamber ( 2 b ) and sterilization pre-chamber ( 2 a ), suitable for separating single pouches (S) from a continuous band ( 5 ).
10. An apparatus according to claim 9 , characterized in that it comprises a conveyor ( 3 ) suitable for taking said continuous band ( 5 ) to said separating device ( 6 ) and carrying means ( 7 ) suitable for taking single pouches (S) separated from said separating device ( 6 ) and to bring them to an entrance ( 8 ) of said sterilization pre-chamber ( 2 a ).