Manufacturing container or tube from paper; or other manufacturi – Bending – Crushing or crumpling
Patent
1997-03-07
1999-02-23
Sipos, John
Manufacturing container or tube from paper; or other manufacturi
Bending
Crushing or crumpling
493407, 493416, 493967, B31D 500
Patent
active
058738096
DESCRIPTION:
BRIEF SUMMARY
The present invention relates to a packaging material making machine and to a method of making packaging material.
In a known method of making paper dunnage a roll of paper is provided which is pulled over a conical former by driven, meshing gears. As the gears pull the paper from the supply roll the paper is rolled over and around the conical former and connected together at the region where the gears mesh. As the former is conical in shape it is difficult to ensure that the paper is controlled sufficiently to have the required shape when it arrives at the meshing gears. This is thought to be because the shape of the complete width of the paper is caused to be changed by the former over the complete extent of the travel of the paper over the former. Furthermore, as the object is to try and bulk up the paper to form the dunnage for packaging purposes, because the cogs that are connecting the overlap layers actually pull the paper off the supply, the paper is under tension in the direction of travel when it arrives at the gears and thereby, although the paper may be bunched up in a direction transverse to the extent of travel of the paper, the paper is taut in the direction of travel thereby forbidding any bunching up of the paper in the direction of travel.
EP 523 382 (Sealed Air Corporation) describes a machine that has feed rolls 20 that direct material towards driven texturing rolls 22. The plies P are then separated and maintained in tension between the texturing rolls 22 and the driven combining rolls 26.
According to one aspect of the present invention a packaging material making machine comprising a sheet material supply region arranged to supply sheet material to a former, pulling means arranged to pull sheet material from the supply region to the former and connecting means located downstream of the pulling means arranged to assist in maintaining the overlapping layers together is characterised in that the pulling means is arranged to push the sheet material to the connecting means. The connecting means may comprise crimping means.
By providing a separate pulling means to the connecting means more control is able to be placed over the supply of the paper to the connecting means.
The pulling means and the connecting means may each include at least one driven rotatable member and at least one of the rotatable members of the pulling means may include a resilient surface. Either of the driven rotatable members of the pulling means or the connecting means may be movable relative to another member or those means. The machine may include a common drive for both the pulling means and the connecting means. The diameter of the driven rotatable member of the pulling means may be greater than the diameter of the driven rotatable member of the connecting means.
The pulling means may be arranged to act along the extent of the former and may act through an opening in the former.
The connecting means may comprise a pair of gears arranged to mesh with the sheet material passing between the gears.
According to another aspect of the present invention a method of making packaging material comprising pulling sheet material from a supply region and causing the shape of the sheet material to change by using a former with the pulling means supplying sheet material from the supply region to a part that at least partially connects overlapping portions of the sheet material is characterised in that the pulling means pushes the sheet material to the part that at least partially connects the overlapping portions.
The present invention includes a method of making packaging material when using a packaging material making machine as herein referred to.
The former may include a generally flat surface against which sheet material is arranged to travel.
Such a machine may provide more control over the forming of the sheet material.
The former may include a flat surface having a lesser extent at a downstream location than it does at an upstream location in a direction transverse to the intended direction of travel of the sheet mater
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Kempster Mark Alan
Panther Timothy Edward Lawrence
Day Christopher W.
Easypack Limited
Sipos John
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