Abstract: The device (2) comprises four drawing cylinders (6, 7, 8, 9) on which the film (5) passes and which are associated with press cylinders (13, 21, 26), comprising: a first drawing cylinder (6) having a fixed axis (10), a second drawing cylinder (7) having a fixed axis (12) which is offset in relation to the previous one, a third drawing cylinder (8) whose position is adjustable and a fourth drawing cylinder (9) having a fixed axis (25). Said cylinders (6 A 9) are rotationally driven at differentiated speeds, such that a first drawing stage is formed between the second cylinder (7) and the third cylinder (8), whereby the drawing distance (D) is preferably adjustable, and a second drawing stage is formed between the third cylinder (8) and the fourth cylinder (9). The invention is used for the longitudinal drawing of synthetic films.

Abstract: The invention relates to drawing systems using a series of jaws for the support, transport and drawing of the film (2), which are supported and guided by rails and driven by endless chains (3), connecting the jaws between the above. Each chain (3) is driven by two toothed wheels (6,7) of large diameter (D), one wheel (6) located at the beginning of the forward run (4) and the other wheel (7) located at the rear end of the return run (5) of the chain (3). Each wheel (6,7) is provided with motorised rotational drive means, said means being synchronised with each other. Such a drive device finds application in high speed drawing machines.

Abstract: The device (2) comprises four drawing cylinders (6, 7, 8, 9) on which the film (5) passes and which are associated with press cylinders (13, 21, 26), comprising: a first drawing cylinder (6) having a fixed axis (10), a second drawing cylinder (7) having a fixed axis (12) which is offset in relation to the previous one, a third drawing cylinder (8) whose position is adjustable and a fourth drawing cylinder (9) having a fixed axis (25). Said cylinders (6 A 9) are rotationally driven at differentiated speeds, such hat a first drawing stage is formed between the second cylinder (7) and the third cylinder (8), whereby the drawing distance (D) is preferably adjustable, and a second drawing stage is formed between the third cylinder (8) and the fourth cylinder (9). The invention is used for the longitudinal drawing of synthetic films.

Abstract: The invention relates to drawing systems using a series of jaws for the support, transport and drawing of the film (2), which are supported and guided by rails and driven by endless chains (3), connecting the jaws between the above. Each chain (3) is driven by two toothed wheels (6, 7) of large diameter (D), one wheel (6) located at the beginning of the forward run (4) and the other wheel (7) located at the rear end of the return run (5) of the chain (3). Each wheel (6, 7) is provided with motorised rotational drive means, said means being synchronised with each other. Such a drive device finds application in high speed drawing machines.

Abstract: The invention relates to a mechanical device which is used for the simultaneous longitudinal and transverse drawing of synthetic films, using successive clamps (13) for supporting, transporting and drawing said film (2). According to the invention, an endless chain (8) is provided on each side of the film, said chain comprising a succession of links (9, 10) which are articulated to one another using vertical shafts (11, 12). The aforementioned clamps (13), which are connected to one shaft (11) out of two, extend out over one side of the chain (8) and are guided on a first rail (14). The invention also comprises guide pieces (15) which are also connected to one shaft (12) out of two, between the clamps (13), and which move on a second rail (16). A variable spacing (E, e) is disposed between the two rails (14, 16), such that the links (9, 10) are essentially aligned or form angles so as to fix or modify the distance (d, D) between the clamps (13).

Abstract: The machine is equipped with a device for cutting the sheet to shift from one roll to another; the cutting device comprises a stand (3) on which a turret (2) has been mounted, said turret bearing at least two parallel spindles (1), each linked to rotating driving means known in the art; the rotation of the turret simultaneously removes a full roll and brings an empty spindle to the coiling station. A carriage (5) capable of motion perpendicular to the spindle axis conveys cylinders to load the machine with sheets to be rolled.