Abstract: A welding device for making and hermetically sealing at least one package containing a product, comprises first and second sealing and cutting equipment. Each sealing equipment is configured to receive a film forming a tubular envelope, to seal and cut it transversally for making at least one package. The welding device comprises a support body, bearing the first and the second sealing and cutting equipment, which is connectable to a packaging machine preferably a rotary drum of a packaging machine. Each sealing and cutting equipment comprises an arm operating as a sealing and cutting head and an abutment body. The arm is rotatably constrained to the support body and reversibly movable between an active position substantially abutting the abutment body, and an inactive position raised with respect to the abutment body. A locking device locks the arms in the active position in the welding step.

Abstract: A horizontal packaging machine (10) for making fluid-tight packages (11) equipped with zip closure (15) comprises: at least one unit (12) for unwinding a film (13) of synthetic material for packaging a series of products (18); at least one unit (14) for unreeling a pair of tapes (15) to form a zip closure; a shaping tunnel (16) located downstream of the film (13) unreeling unit (12); a sealing unit (20) located downstream of the shaping tunnel (16); Downstream of the sealing unit (20), the machine comprises a power-driven film feed roller (21) designed to apply a uniform pulling force on the film (13) which is unwound and fed into the sealing unit (20).

Abstract: A horizontal packaging machine (10) for making fluid-tight packages (11) equipped with zip closure (15) comprises:

Abstract: A process for the production of a hermetic re-closeable package suitable for various products, in particular food products (4), which consists in partly overlapping two (1,2) sheets of flexible material in order to define two longitudinal side edges (1a,2a) overlapping each other, in joining the two edge regions in such a way as to make them separable and recloseable, in locating the product on said sheets, with one side located next to the edge regions sealed in such a way that they are separable, thereafter in wrapping the so joined sheets around the product by sealing one to the other the side edges opposed to the edges among them already joined; in joining the opposed free ends of such sheets and in sealing them so as to form two end seals; an air-tight packaging is thus produced, openable and recloseable after each partial drawing of product through the opening made by separation and raising of the edge region from the underlying one.