Abstract: A machine for wrapping a load with a film of plastic material is provided having a means for supporting a load, a means for supporting a film strip reel, a first means for causing a relative pivoting movement of the film reel axis and the load support means, a second means for causing a relative pivoting movement of the film reel axis and the load support means about a second pivoting axis, and a drive means acting on the first and second means to bring about the two relative pivoting movements in order to coordinate their operation.

Abstract: A wrapping machine for wrapping a palletized load is provided with a film carriage having a spool of film. A means for unwinding the film from the spool from an upstream winding position to a downstream position in accordance with a selected path where it is applied to the load is also provided. Prestretching rollers for prestretching the film before it is applied to the load are contained on the film carriage. Cutting blades are used to pierce the film, downstream of the prestretching rollers, into longitudinally extending strips. The strips are then separated into longitudinally extending bands by a separating roller. The bands are applied to a load by the carriage which slidably moves up and down along a support column in combination with a turntable upon which the load rotates.

Abstract: A machine for wrapping the sides and one end face of a palletized load is provided with a rotatable load support means and a pivoting axis reel of film which is capable of vertical movement in a plane parallel to the vertical sides of the load as well as rotation about a second axis perpendicular to the side face of the load. The load is wrapped by attaching a terminal end of the plastic film near the bottom edge of the load and rotating the load while the film reel moves vertically and pivots about an axis perpendicular to the vertical side faces of the load until the sides and top face of the load are wrapped.

Abstract: A method to prevent tearing of packaging film is provided using a carriage which includes a stand, a supporting shaft for a film reel and a roller device; the carriage being intended to be incorporated in a packaging machine for wrapping loads. Plastic film is unwound from a film reel and longitudinal creases are formed on the longitudinal edges of the film web to prevent tearing of the film during packaging.

Abstract: A method and apparatus for wrapping the sides and covering the top of a load. The apparatus comprises of a reel of wrapping film and a load support that can be rotated relative to each other about an axis that is coincident with the vertical axis of the load to thereby wrap the sides of the load. The film reel and the load support are further pivotable relative to each other about a second axis that is orthogonal to the load axis as well as slidable relative to each other along this second axis to thereby cover the top face of the load.

Abstract: A carriage for unwinding packaging film and incorporation in a packaging machine, comprising a stand carrying a supporting shaft for a film reel and a roller device carried by the stand and comprising two main rollers including upstream and downstream rollers with parallel axes of rotation and set transversely apart but near to one another to define therebetween a passage for the packaging film having an entry orifice and an exit orifice, the two main rollers being simultaneously rotatable about their respective axes in opposite directions by drive means. Two film guide rollers including an upstream and a downstream guide roller are respectively associated with the upstream and downstream main rollers and have axes of rotation parallel to one another and to the axes of rotation of the main rollers.

Abstract: A method for banding a palletized load is provided for a fixed table machine with stationary load where the reel of film is displaced about the load and unwound as a consequence thereof to form at least one turn of the band whereupon the band of film is transversely cut, the last end part of the band of film is combined with the banded load and the new first end part of the film is secured and the banded load removed. During at least one stage of the banding, the reel of film is displaced in a path forming a horizontal loop and, in this stage, the band of unwound film is deviated and offset in the vertical direction to avoid irregular wrinkling of the film.

Abstract: In a vertical and helical banding machine having a rotary table, a carriage mounted on a mast secured to a stand is driven between upper and lower positions and has a delivery roller rotatable about a vertically stationary axis for passing the banding film to helically wrap or band the load. The carriage includes a support for changing the direction of banding film from a horizontal to a veritcal position as the film is delivered to the delivery roll. A prestretching mechanism is provided for prestretching the film prior to delivery to the carriage. The mechanism includes a horizontal vertically movable bearing roller carrying the film reel and a horizontal support roller parallel to the bearing roller and positioned beneath the film reel and supporting same whereby the lower horizontal generatrix between the reel of film and the support roller forms a constant reference to control the speed of film being unwound from the reel and in conjunction therewith acts as a prestretching mechanism.

Abstract: In a banding machine of the fixed-table and pivoting reel of film type, a mechanism is provided for deviating and vertically offsetting the downstream, delivered section of the band of film which is actuated during banding, from a state in which deviation and offset are minimal to a condition where the band of film applied to the load is off-set vertically with respect to the reel of film whereby wrinkling of the film is avoided at the lowermost portion of the load.

Abstract: The invention provides for a process for feeding packaging film to a wrapping machine. The film is fed to an upstream and downstream main rollers defining between them a passage. As the film is fed towards the rollers, upstream and downstream guide rollers are located at positions nearest the entry and exit sides of the passage. Once the film is fed through the passage, the guide rollers move in opposite directions away from the passage.