Device for sealing plastic tray that is utilized for packaging food products under e.g. vacuum atmosphere, has coupling units cooperating with complementary coupling units of head to couple and uncouple sole to and from jack

摘要

The device has an enclosure comprising an upper cover (1) and a lower cover, and a welding head (7) mounted on the upper cover and displaced between retracted and welding positions by a displacement system. A piston rod (83) traverses in an upper wall of a cylinder (81) and comprises an axial passage (834). An assembling system (9) comprises an assembling rod (91), where coupling units (911) are arranged in a lower end of the assembling rod and cooperate with complementary coupling units (731) of the welding head to couple and uncouple a sole (73) to and from the jack.