A stretch film supply roll used in stretch wrapping palletized loads includes a plurality of lengths of stretch film wound into a roll form and joined to one another using a plurality of lap seals that forms a continuous web of stretch film on the roll form. Such a stretch film supply roll may be useful, for example, in reuse applications where stretch film is reused multiple times to wrap different loads. In some instances, the lengths of stretch film may have been used to previously wrap different loads, and in some instances, the lengths of stretch film may have differing characteristics such as materials and/or thicknesses

A stretch film supply roll used in stretch wrapping palletized loads includes a plurality of lengths of stretch film wound into a roll form and joined to one another using a plurality of lap seals that forms a continuous web of stretch film on the roll form. Such a stretch film supply roll may be useful, for example, in reuse applications where stretch film is reused multiple times to wrap different loads. In some instances, the lengths of stretch film may have been used to previously wrap different loads, and in some instances, the lengths of stretch film may have differing characteristics such as materials and/or thicknesses

In a controller for a converting line: (a) mechanical characterization module generates an estimate of an applied web force at a driven roller based upon velocity and torque signals, and mechanical properties associated with an upstream and downstream roller, one or both of which may be the driven roller; (b) a web stiffness estimator module generates a span stiffness estimate, a previous span tension estimate, and a span time constant based upon the span length, the velocity signals from the upstream and downstream roller sensors, a span tension signal from the span tension sensor, and the applied web force estimate from the mechanical characterization module; and (c) a tension control module generates a velocity trim command signal for the driven roller based on the span stiffness estimate, the previous span tension estimate, a web span time constant, a span tension signal, and a span tension setpoint.

In a controller for a converting line: (a) mechanical characterization module generates an estimate of an applied web force at a driven roller based upon velocity and torque signals, and mechanical properties associated with an upstream and downstream roller, one or both of which may be the driven roller; (b) a web stiffness estimator module generates a span stiffness estimate, a previous span tension estimate, and a span time constant based upon the span length, the velocity signals from the upstream and downstream roller sensors, a span tension signal from the span tension sensor, and the applied web force estimate from the mechanical characterization module; and (c) a tension control module generates a velocity trim command signal for the driven roller based on the span stiffness estimate, the previous span tension estimate, a web span time constant, a span tension signal, and a span tension setpoint.

The invention relates to a method of winding and packaging wide wallpaper, which is wound around a roll on a winding and rotary device, followed by packaging wallpaper in containers for transportation or storage. In the first embodiment of the invention, in the presented process, winding of the wallpaper (3) is carried out onto a winding and rotation mechanism, made in the form of a finished hollow closed cylindrical tube (1) of flexible material, equipped with a valve (2) for supplying and discharging air from it. At the same time, the valve (2) is fixed on one of the tube bases (4). Along the length of the pumped cylindrical tube (1) is fixed the edge of the wallpaper (3) and wound it on the tube (1) until a roll of the required length is obtained. In the second embodiment of the invention, the tube for wallpaper winding is formed from a part of a whole piece of wallpaper material (6) separated from the edge (7) in the form of a fold along the width of the wallpaper. The selected part of the wallpaper material, corresponding to the diameter of the tube (9) being created, is laid in width in two layers and fastened along the perimeter of the formed sides. The valve (10) is installed on one of the bases of the cylindrical tube (9) formed when air is pumped. The rest of the whole piece of wallpaper is wound on the tube (9) until a roll of the required length is obtained. Further, in both embodiments of the described method, the air is released from the tube through the valve to form a flat rectangular structure in the form of wallpaper layers with a tube placed inside. The resulting structure is laid into several layers for packaging in containers and subsequent storage and transportation. Flexible materials such as paper, vinyl, PVC, polyethylene and others are used as material for the manufacture of the tube.

The invention relates to a method of winding and packaging wide wallpaper, which is wound around a roll on a winding and rotary device, followed by packaging wallpaper in containers for transportation or storage. In the first embodiment of the invention, in the presented process, winding of the wallpaper (3) is carried out onto a winding and rotation mechanism, made in the form of a finished hollow closed cylindrical tube (1) of flexible material, equipped with a valve (2) for supplying and discharging air from it. At the same time, the valve (2) is fixed on one of the tube bases (4). Along the length of the pumped cylindrical tube (1) is fixed the edge of the wallpaper (3) and wound it on the tube (1) until a roll of the required length is obtained. In the second embodiment of the invention, the tube for wallpaper winding is formed from a part of a whole piece of wallpaper material (6) separated from the edge (7) in the form of a fold along the width of the wallpaper. The selected part of the wallpaper material, corresponding to the diameter of the tube (9) being created, is laid in width in two layers and fastened along the perimeter of the formed sides. The valve (10) is installed on one of the bases of the cylindrical tube (9) formed when air is pumped. The rest of the whole piece of wallpaper is wound on the tube (9) until a roll of the required length is obtained. Further, in both embodiments of the described method, the air is released from the tube through the valve to form a flat rectangular structure in the form of wallpaper layers with a tube placed inside. The resulting structure is laid into several layers for packaging in containers and subsequent storage and transportation. Flexible materials such as paper, vinyl, PVC, polyethylene and others are used as material for the manufacture of the tube.

A tape package comprises a cylindrical roll core having an outer surface and an interior space; a first roll of an adhesive tape wound on the outer surface of the cylindrical roll core; and a second roll in the interior space, the second roll comprising a plurality of adhesive tape rectangles on a non-adhesive backing.

A tape package comprises a cylindrical roll core having an outer surface and an interior space; a first roll of an adhesive tape wound on the outer surface of the cylindrical roll core; and a second roll in the interior space, the second roll comprising a plurality of adhesive tape rectangles on a non-adhesive backing.

A spool 1 for round balers, comprising a support core and a net for round balers, which is wound on the core defining a plurality of spool windings, and is unwindable from the core to be wound on a bale of material defining a plurality of bale windings. The net comprises a plurality of first chains, each defined by at least a first thread, and a plurality of wefts, each defined by at least a second thread arranged between two first chains. The first chains of each spool winding are spaced apart from the first chains of at least one preceding and/or subsequent winding along an axial direction by a distance such that, when the net is wound on the bale, the first chains of each bale winding are spaced apart from the first chains of at least one preceding and/or subsequent bale winding along a direction substantially parallel to a bale longitudinal axis. In detail, when the net is wound on the bale, the first chains extend on the bale at least along the bale axial direction by at least a predetermined pitch, such that the distance between the first chains of two subsequent bale windings has a value comprised between and of the predetermined pitch.

A spool 1 for round balers, comprising a support core and a net for round balers, which is wound on the core defining a plurality of spool windings, and is unwindable from the core to be wound on a bale of material defining a plurality of bale windings. The net comprises a plurality of first chains, each defined by at least a first thread, and a plurality of wefts, each defined by at least a second thread arranged between two first chains. The first chains of each spool winding are spaced apart from the first chains of at least one preceding and/or subsequent winding along an axial direction by a distance such that, when the net is wound on the bale, the first chains of each bale winding are spaced apart from the first chains of at least one preceding and/or subsequent bale winding along a direction substantially parallel to a bale longitudinal axis. In detail, when the net is wound on the bale, the first chains extend on the bale at least along the bale axial direction by at least a predetermined pitch, such that the distance between the first chains of two subsequent bale windings has a value comprised between and of the predetermined pitch.