Patent ID: 6270334
Filing Date: 2001-08-07
Classification: B29C,B65H,Y10S

Abstract:
A device for automatic insertion of a strip of synthetic film coming from a longitudinal drawing machine into a transverse drawing machine, said transverse drawing machine having two endless chains carrying tenters designed to grip edges of the film, the two chains spaced apart from each other, with the two chains passing, adjacent to an entrance of the transverse drawing machine, onto reversing pulleys, an auxiliary winding mandrel being disposed at an exit of the longitudinal drawing machine, below said exit, comprising:a fixed cylinder with an axis perpendicular to a travel axis of the film, located upstream of the entrance to the transverse drawing machine, a lower generatrix of said fixed cylinder being located in a travel plane of the film in the transverse drawing machine,a chest having a slot provided in an upper surface of the chest and having an axis perpendicular to the travel axis of the film, mounted on a movable support, displaceable between a retracted position and a position in which the chest is located between said fixed cylinder and the entrance to the transverse drawing machine, the upper surface of the chest then being disposed substantially in the film travel plane in the transverse drawing machine, the chest serving to accommodate at least one knife displaceable in the direction of the chest axis and retractable so that it either projects or does not project beyond said slot, andtwo lifters, each of said lifters being in working relation with a reversing pulley of the transverse drawing machine for displacing the film between a lower position and a position in which it is located in a travel plane of the film tenters.