ES359799A1 - Tape winding machine - Google Patents

Abstract

To prevent a tape from being crushed by the trailing edge of a traversing device 10 of a package winding apparatus, the tape is fed over at least one guide member 8 that alters its setting relative to the take-up spindle 4 so as to bias the tape 2 to move readily from the centre of the package towards its ends but adapts a fresh setting when the tape is moving from the ends of the package towards the centre of the package, said fresh setting causing a lesser degree of bias or even negative bias to retard movement of the tape sideways. In Fig. 1 the guide member is a round bar 8 in the form of a shallow V pivoted at 14. The tape 2 engages the underface of the bar 8. The bar 8 is rocked by a piston and cylinder unit 56 controlled by co-operating means 52, 54 and 53, 55 on the traverse mechanism. When the tape is returning from the left-hand end of the package the bar 8 is in the full line position with its arm 18 horizontal or slightly sloped downwardly towards the pivot 14. The other arm 181 of the bar slopes upwardly. When the tape is returning from the right-hand end of the package the unit 56 operates to rock the bar to the broken line setting in which the arm 181 is horizontal or slightly sloped downwardly towards the pivot 14 and the other arm 18 slopes upwardly. Stops 62 define the desired settings of the bar 8. The guide member may be between the traverse member and the package. In a modified construction the guide member comprises two wings mounted on an axis parallel to the spindle 4, the guide member pivoting back and forth in a radial direction to substitute one wing for the other at the ends of the traverse movement, the wings being shaped to give a different degree of bias to the tape during traverse from and to the ends of the package. Traverse mechanism.-The traverse device 10 is coupled to a nut 22 on a traverse screw 24. The screw 24 is driven from a shaft 30, see also Fig. 3 (not shown), through gearing controlled by a piston 42. When the components 52, 54 co-operate the piston 42 rocks a bracket 38 to a setting in which the gear 44 is driven by gear 32 via gear 34. When the components 53, 55 co-operate the piston 42 rocks the bracket 38 to a setting in which the gear 34 moves away from the gear 44 and a further gear (40) driven by the gear 34, engages gear 44.