FIELD: packaging industry.
SUBSTANCE: device with opposing hood constructions (1, 8) for packaging in modified atmosphere of the products (M) placed on the trays (V, V'), Comprises mechanisms for cyclically arranging the tensioned portion of the protective film (H) between two open hood constructions and above the chutes disposed with the cushion means (13) in the sockets (110) of the lower hood structure, which comprises the mechanisms (F1, F2) In the direction of each other so as to close the film (H) between them and close under and at an appropriate distance from it the edge of the tray (V, V'). In the device, the hood constructions are closed, they form inside two not directly communicating volumes, one of which is formed by internal chambers (2, 9) of these hood constructions, which communicate with each other by means of contours (16, 3), for example, peripheral ones, then As the other volume is formed by the main chambers (P) of trays (V, V') with the product (M). In this case, the chambers (P) are connected with a part of their perimeter with the holes (26) and the corresponding contour (27, 127, 227) for controlled input of process gases, and the other part of their perimeter are connected to the outlets for air removal and washing having internal valves Mechanisms that ensure that the outlets (24) of the main chambers (P) of the chambers with inner chambers (2, 9) are not communicating or not communicating to balance the pressure difference between the two volumes (2, 9 and P) during the gas exchange cycle necessary for Create package known as MAP.
EFFECT: increasing automation while simplifying.
10 cl, 7 dwg
