Patent ID: 6955320
Filing Date: 2005-10-18
Classification: B65H

Abstract:
1. An unwinding system for handling reels of tissue comprising: for each ply of laminar tissue to be applied a pair of reels, of which one supplies a laminar web to be applied, whilst the other is placed on stand-by to be spliced onto an infeed line when the supply reel is spent, wherein: the pair of reels are mounted in respective reel-carrier assemblies which are capable of vertical displacement, with one reel being located on an upper part and the other on a lower part at a distance between them that enables the reel in stand-by to be prepared whilst the other reel is in an operating mode; each reel is mounted between respective holding cones that control unwinding rotation, with said cones also being capable of being moved closer together or further apart for loading and unloading of the corresponding reel; a reel-carrier from which one of the reels is removed is displaced vertically until it occupies the upper part, whilst a reel-carrier that holds a fresh reel that is coming into operation drops to a lower position, freeing the upper part for incorporation of a new reel in the reel-carrier that has become unoccupied; and a splicing mechanism for automatic splicing of the laminar web on the reel in stand-by with the web on the reel in operation when the latter is spent, with said mechanism comprising a fixed bar, a moving bar operated by pneumatic cylinders that is capable of being displaced towards the fixed bar and another moving bar operated by a chain and pinion system that is capable of displacement between a position of operation and a position of insertion between the fixed bar and the moving bar to be grasped between them, with said other moving bar incorporating a clamp such that a leading edge of the laminar web that is in the stand-by position may be taken up.