Device for the sealing of a port or fitment on a thermoplastic film

A device for sealing a fitment on a thermoplastic film, comprising a chassis, a support plate attached to the chassis and movable with respect to the chassis, a welding head rigidly connected to the support plate, at least one ring-shaped heating resistance carried by the welding head, means for feeding current to the welding head located at two diametrically opposed points, means for the diffusion of a cooling fluid to a position where the means for feeding current are fixed on the heating resistance, the means for the diffusion of a cooling fluid including channels that extend into the welding head and surround the means for feeding current, the welding head including an upper part and a lower part connected together, and means for the circulation of a cooling fluid between the upper part and the lower part, the means for the circulation of a cooling fluid includes a groove shaped like an arc of a circle that is formed in the lower face of the upper part of the welding head, and the sealing device further including feeding channels provided in the upper part of the welding head and an opening located at one end of the groove and at the other end of the groove on a side of the upper part.

A device for sealing a fitment on a thermoplastic film, comprising a chassis, a support plate carried by the chassis and movable relative to the chassis, and a welding head rigidly connected to the support plate, the welding head includes a vertical guiding boring and a ring-shaped heating resistance that defines an aperture, the ring-shaped heating resistance circumscribing a portion of the vertical guiding boring, the sealing device includes a positioning means located below the welding head, the positioning means being mounted on the chassis, and a pivoting shaft being supported by a frame adjacent to the film, the chassis being mounted and rotatable on the pivoting shaft.

A device for sealing a fitment on a thermoplastic film, comprising a chassis, a support plate attached to the chassis and movable with respect to the chassis, a welding head rigidly connected to the support plate, at least one ring-shaped heating resistance carried by the welding head, means for feeding current to the welding head located at two diametrically opposed points, means for the diffusion of a cooling fluid to a position where the means for feeding current are fixed on the heating resistance, and including a film driving means downstream from the welding head, a film blocking means, including pinching members, upstream from the welding head relative to a direction of movement of the film, a support bar rigidly mounted in the pinching members on one side of the film, and an eccentric member pivotally mounted on an opposite side of the film to pivot between a position remote from the film and a position in contact with the film.

A device for sealing a fitment on a thermoplastic film, comprising:

• a chassis, a support plate carried by the chassis and movable relative to the chassis, and a welding head rigidly connected to the support plate, the welding head includes a vertical guiding boring and the sealing device includes a positioning means located below the welding head, a film driving means downstream from the welding head, a film blocking means, including pinching members, upstream from the welding head relative to a direction of movement of the film, a support bar rigidly mounted in the pinching members on one side of the film, and an eccentric member pivotally mounted on an opposite side of the film to pivot between a position remote from the film and a position in contact with the film.