Modified atmosphere, second skin or vacuum packaging machine, and method

摘要

Modified atmosphere, second skin or vacuum packaging machine comprising first feeding means (2) adapted to feed the machine (1) with a first film (30), second feeding means (3) adapted to feed the machine (1) with a second film (31), a sealing station (7) in which the vacuum is carried out and / or the filling with the modified atmosphere between both films (30,31), and the sealing from the second film (31) to the first film (30) to obtain a container (34), and displacement means (20.40) adapted to move the first film (30) in a forward direction, characterized in that the means of displacement (20.40) are configured to move at least the first film (30) an advancing distance from an initial position, stepping and dragging at least the first film (30) in the direction of advance to an end position, being configured said means of displacement (20.40) to return post subsequently, when the machine is in an operating mode, to the initial position, where the displacement means (20,40) comprise at least one fixed support (22,29) and at least one mobile support (21,28) movable in the forward direction with respect to said fixed support (22,29), each fixed support (22,29) comprising at least one support (24,27) on which the first film (30) is arranged and at least a treadmill (23,26) configured to press the first film (30) against the corresponding support (24,27) keeping the first film (30) in the determined position, when the machine (1) is in operation mode and comprising each mobile support (21,28) at least one support (44,47) on which the first film (30) and at least one treadmill (43,46) configured to press the first film (30) against the support ( 44.47) corresponding when the machine operates in the advance mode, where the treadmills (23,26,43,46) press on unformed areas (33) of the pri mer film (30), said non-formed areas (33) forming the edge (35) of the corresponding container (34) to be obtained, the machine (1) also comprising punching means (15) arranged upstream of the sealing station ( 7) and adapted to punch the first film (30) in a non-formed area (33) of the first film (30), said punching means (15) making at least one hole (17) and / or a notch (18) in said unformed zone (33), at the intersection of unformed zones (33).