Package making – With contents treating – Reshaping
Patent
1997-01-27
1998-03-10
Culver, Horace M.
Package making
With contents treating
Reshaping
53526, 53551, B65B 122, B65B 920
Patent
active
057247927
DESCRIPTION:
BRIEF SUMMARY
PRIOR ART
The invention is based on an apparatus for producing bag packages. To reduce the friction between the packaging material and the forming shoulder, it is known from German Patent Disclosure DE 34 11 370 A1 to cause the forming shoulder to oscillate. A disadvantage of this is that relative motions occur in the transition region between the forming shoulder and the forming pipe, which stress the tube during its stopped phase, for instance during the crosswise sealing. It is also known from German Published, Unexamined Patent Disclosure DE-OS 24 50 008 to cause merely the forming pipe to oscillate longitudinally, but to leave the forming shoulder stationary. This not only reduces the friction between the packaging material and the forming pipe but also shakes loose any product sticking to the inside of the forming pipe. The problems with respect to relative motion between the forming pipe and the forming shoulder, however, exist in this known apparatus as well. Moreover, product is fed loosely into the tube, in other words uncompacted, so that the consumption of packaging material is relatively high in this known apparatus.
ADVANTAGES OF THE INVENTION
The apparatus according to the invention for producing bag packages has the advantage over the prior art that no relative motions occur in the transitional region between the forming shoulder and the forming pipe. As a result, the strain on the tube is reduced, and even untreated foil or film materials with relatively poor coefficients of friction can be used. Compacting of the product in the tube is also attained, thereby lowering the consumption of packaging material. In addition, the adhesion of product to the end of the filling pipe is avoided, so that particularly when the crosswise seam is formed the danger that the crosswise seam will be soiled is reduced.
Further advantages and advantageous features of the apparatus according to the invention for producing bag packages will become apparent from the description. In a first embodiment of the invention, it is possible to transmit merely longitudinal oscillation to the tube forming device. As a result, in particular fine-particle product is strongly compacted. In a second embodiment of the invention, in additional to the longitudinal oscillations, crosswise oscillations are also generated and transmitted to the tube. This allows a high degree of compaction, especially with a product that has a tendency to become caught. It is especially advantageous if the proportion of crosswise oscillation components, in the second embodiment of the invention, can be varied in accordance with the product. Optimal compaction adapted to the product is thereby possible.
BRIEF DESCRIPTION OF THE DRAWING
Two exemplary embodiments of the invention are shown in the drawings and will be described in further detail in the ensuing description.
FIG. 1 shows a first apparatus for producing bag packages, in a simplified side view;
FIG. 2 shows the apparatus of FIG. 1 in a simplified front view; and
FIG. 3 shows a second apparatus for producing bag packages, in a simplified front view.
DESCRIPTION OF THE EXEMPLARY EMBODIMENTS
The first apparatus for producing bag packages, shown in FIGS. 1 and 2, has a tube forming device 10, comprising a forming shoulder 11 and a forming pipe 12 rigidly joined to the forming shoulder 11. By means of the tube forming device 10, a tube 15 is shaped from a strip of packaging material 14 that can be hot sealed on at least one side. The strip of packaging material 14 is kept on hand on a supply roll, not shown, and is transported or drawn off in increments by means of two vacuum-supported conveyor belts 17 disposed opposite the forming pipe 12.
To form a continuous longitudinal seam, a longitudinal seam sealing device 18 is disposed between the conveyor belts 17 on the forming pipe 12. The longitudinal seam sealing device 18 is movable horizontally back and forth in the direction of the forming pipe 12. Inside the forming pipe 12, a fill pipe 20, drawn in dashed lines in FIG. 1, is provid
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Bischet Wolfgang
Domke Klaus
Keicher Gerald
Lachenmaier Holger
Lampl Christoph
Culver Horace M.
Greigg Edwin E.
Greigg Ronald E.
Robert & Bosch GmbH
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