Apparatus for wrapping goods with stretched foil

Claim 1

An apparatus for wrapping and fixing of at least one unit of goods with or without support, the unit being enclosed on at least four sides by a foil whilst the foil is being stretched, said apparatus comprising two foil rolls disposed one on each side of a conveying web for the unit, which foil rolls are interconnected by a coherent foil portion; means acting together with each foil roll for braking the foil when the unit of goods is being advanced between the foil rolls to a position in which three sides of the unit are enclosed by the foil; two opposed clamping and welding jaws capable of being moved toward each other on the fourth side of the unit of goods for joining and welding together the two foil portions separated by the unit, which jaws have a width corresponding to the foil width; a knife member for cutting off the foil portions longitudinally through the weld or between two welds; two pairs of brake rollers for the foil, one pair on each Side of the conveying web of the unit of goods, each pair of brake rollers comprising a rotary rubber roller which is adjustably braked, said each pair of rollers being supported by the clamping and welding jaws for performing a reciprocatory movement in correspondence with the movement of the clamping and welding jaws, at least one roller of each pair being braked, and the foil being supported between said two brake rollers of each pair.

Claim 2

An apparatus for wrapping and fixing of at least one unit of goods with or without support, the unit being enclosed on at least four sides by a foil whilst the foil is being stretched, said apparatus comprising two foil rolls disposed one on each side of a conveying web for the unit, which foil rolls are interconnected by a coherent foil portion; means acting together with each foil roll for braking the foil when the unit of goods is being advanced between the foil rolls to a position in which three sides of the unit are enclosed by the foil; two opposed clamping and welding jaws capable of being moved toward each other on the fourth side of the unit of goods for joining and welding together the two foil portions separated by the unit, which jaws have a width corresponding to the foil width; a knife member for cutting off the foil portions longitudinally through the weld or between two welds; two pairs of brake rollers for the foil, one pair on each Side of the conveying web of the unit of goods, each pair of brake rollers comprising a rotary rubber roller which is adjustably braked, said each pair of rollers being supported by the clamping and welding jaws for performing a reciprocatory movement in correspondence with the movement of the clamping and welding jaws, at least one roller of each pair being braked, and the foil being supported between said two brake rollers of each pair.