Manufacturing container or tube from paper; or other manufacturi – Tube making – Including closing end of tube
Patent
1984-01-05
1986-04-22
Husar, Francis S.
Manufacturing container or tube from paper; or other manufacturi
Tube making
Including closing end of tube
493303, 493108, 493960, 493930, 493212, 229 87R, 604904, B21D 508
Patent
active
045839646
DESCRIPTION:
BRIEF SUMMARY
The invention relates to a method for producing a cylindrical packing tube which is open at one end and closed at the other and is made from deformable tear-resistant packing material, and to an apparatus for carrying out this method.
There are numerous mass-produced articles which have to be packed until used for the purpose for which they are intended, in order to protect them against soiling and other harmful influences. These include, for example, tampons for feminine hygiene, which are packed individually in cylindrical packing tubes. In this connection it must be borne in mind that such tampons are frequently produced by compressing on all sides a moisture-absorbing material, so that before they are used they tend to expand again in all directions. It is therefore expedient for each tampon to be surrounded positively by a tear-resistant packing material.
From German Patent Specification No. 1,955,600 a method and an apparatus are known for closing, in a shape-retaining manner, at least one end of a packing tube, particularly for tampons for female hygiene. One still open end of a cylindrical packing tube containing a tampon, the rounded insertion end of which faces the open end of the packing tube, is in this case closed by means of a twisting device. This operation consists in that the twisting device grips the packing material at the open end of the packing tube and turns it while the packing tube remains stationary. A twist is thus formed at this end of the packing tube, and the rosette of this tube, which at first projects, is pressed against the packing tube and then flattened. The end of the packing tube closed in this manner then corresponds in shape to the rounded insertion end of the packed tampon.
With this procedure, the use of a heat-sealable film coated on both sides, for example of cellulose hydrate or regenerated cellulose (obtainable under the trade mark "CELLOPHAN"), may have the consequence that this film is by mistake sealed to the insertion end of the tampon and is then difficult to remove when the tampon is to be used.
In addition, with this type of tube closure, different closure patterns are obtained, depending on the shape of the rounded end of the tampon. Nevertheless, a uniform closure pattern is desirable, which is not dependent on the shape of the end of the tampon.
The problem underlying the invention is that of providing a method and an apparatus which permit the production of a cylindrical packing tube which is open at one end and closed at the other, is made from deformable tear-resistant packing material and is intended, in particular, for tampons used in female hygiene, wherein a high speed of production is achieved, and a reliable aesthetically perfect closure of the respective end of the packing tube is obtained. In addition, it should be possible to use a heat-sealable film coated on both sides as packing material, and it should be ensured that the objects which are to be packed, e.g. tampons, can be packed positively in the packing tube without undesirable sticking to the packing material.
In order to solve this problem, the starting point of the invention is a method in which a portion of the packing material is drawn by suction onto a winding spindle provided with suction apertures and through the rotation of the winding spindle is wrapped around the latter, while the overlapping ends of the portion are joined together to form the packing tube, whose end projecting beyond the winding spindle is closed, whereupon the packing tube is removed from the winding spindle; the method according to the invention is characterised in that that end of the cylindrical packing tube which projects beyond the winding spindle is held fast and is closed during the rotation of the winding spindle so as to form a twist.
According to a further development of the method, the overlapping ends of the portion of packing material are joined by heat sealing. In this way, a packing tube durably closed on its periphery is obtained by a short process step.
In a preferred embodiment of the me
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Husar Francis S.
J&J G.m.b.H.
Jones David B.
Lipow Jason
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