Abstract: A device for stretching a thermoplastic film simultaneously in the longitudinal direction and the transverse direction is provided. The device includes, on each side of the film (F) to be stretched, grasping members for grasping a lateral edge of the film (F), and guide members; first and second guide rails (R1, R2), on which the members and are respectively able to move; first connecting rods connecting the grasping members and the guide members. In an embodiment, each guide member is connected to a single grasping member by one or several of said first connecting rods, and is connected to a first longitudinal adjusting member by one or several second connecting rods connected to the first longitudinal adjusting member; and the device includes adjusting means for adjusting the position and orientation of said first longitudinal adjusting member relative to said first and second guide rail (R1, R2).

Abstract: The machine (1) includes at least one assistance subassembly (10) having: an endless chain or belt (16); a plurality of thrust members (20) connected to the chain or belt (16) in succession and projecting from the chain or belt (16), and a drive device (21) of this chain or belt (16), several thrust members (20) are brought into the path (3) of the sliders (8) connected to the grippers (4) for gripping the film (F), so that at least one of the thrust members (20) comes to bear against at least one of these sliders (8) and exerts a thrust on this slider to assist the displacement of this slider along the rail (5e) on which this slider moves.

Abstract: The machine (1) includes at least one assistance subassembly (10) having: an endless chain or belt (16); a plurality of thrust members (20) connected to the chain or belt (16) in succession and projecting from the chain or belt (16), and a drive device (21) of this chain or belt (16), several thrust members (20) are brought into the path (3) of the sliders (8) connected to the grippers (4) for gripping the film (F), so that at least one of the thrust members (20) comes to bear against at least one of these sliders (8) and exerts a thrust on this slider to assist the displacement of this slider along the rail (5e) on which this slider moves.

Abstract: A device for stretching a thermoplastic film simultaneously in the longitudinal direction and the transverse direction is provided. The device includes, on each side of the film (F) to be stretched, grasping members for grasping a lateral edge of the film (F), and guide members; first and second guide rails (R1, R2), on which the members and are respectively able to move; first connecting rods connecting the grasping members and the guide members. In an embodiment, each guide member is connected to a single grasping member by one or several of said first connecting rods, and is connected to a first longitudinal adjusting member by one or several second connecting rods connected to the first longitudinal adjusting member; and the device includes adjusting means for adjusting the position and orientation of said first longitudinal adjusting member relative to said first and second guide rail (R1, R2).

Abstract: The invention relates to equipment (3) for drawing a film made of synthetic material, which includes longitudinal drawing means (11) and transverse drawing means (15) comprising a drawing enclosure (16), an air outlet opening (17) leading into the enclosure and an air inlet opening (18) leading into the enclosure. The transverse drawing means further comprise an air recirculation circuit (19) connecting the air inlet and outlet openings (18, 17) and designed to redirect the air from the air outlet opening towards the air inlet opening.

Abstract: The invention relates to a cooling unit (2) which comprises a cooling tank (3) at least partially filled with a heat transport coolant, and a cooling drum (4) at least partially submerged in the cooling tank, the cooling drum including a shell (5) having two side flanges (6) which are at least partially perforated such that the inside of the shell is at least partially filled with the heat transport coolant. The cooling tank (3) comprises at least one heat transport coolant supply opening (12) situated opposite one of the side flanges (6) of the shell (5) and designed to supply the cooling tank with the heat transport coolant.

Abstract: The invention relates to equipment (3) for drawing a film made of synthetic material, which includes longitudinal drawing means (11) and transverse drawing means (15) comprising a drawing enclosure (16), an air outlet opening (17) leading into the enclosure and an air inlet opening (18) leading into the enclosure. The transverse drawing means further comprise an air recirculation circuit (19) connecting the air inlet and outlet openings (18, 17) and designed to redirect the air from the air outlet opening towards the air inlet opening.