Patent ID: 8951179
Filing Date: 2015-02-10
Classification: B65H

Abstract:
1. A feeding unit for reels of sheet-like material, with print-position marks, for automatic packaging machines, the feeding unit comprising: two unrolling shafts that each support a reel of said material and feed said material towards means for cutting and welding the tail of material from a first one of said reels of said shafts with a head of material from a second one of said reels on the other of said shaft, the unit further comprising a control system of operation of said shafts and said cutting and welding means, wherein said cutting and welding means comprises two suction, cutting and welding devices arranged on mutually opposed sides of a material welding plane, said devices being movable so as to approach and move away from each other, so as to press said head and tail of said materials, and each of said devices comprising a box-like structure including a front wall facing said welding plane, and is defined by a group of mutually stacked suction and cutting modules which define a front wall facing said welding plane, at least two of said modules being provided with respective guides for cutting means slidable in a transversal direction with the respect to the feeding direction of the material, whereby it is possible to choose said modules and adjusting their number according to a desired welding height.