Package making – Methods – Applying a partial cover
Patent
1990-10-09
1992-06-30
Sipos, John
Package making
Methods
Applying a partial cover
53126, 53436, 53438, 53449, 53528, 53529, 53586, 53DIG2, B65B 6302, B65B 2712
Patent
active
051252104
DESCRIPTION:
BRIEF SUMMARY
FIELD OF THE INVENTION
The invention relates in general to packaging devices and in particular to a new and useful process and device for the wrapping of compressed bales, in particular of fibre bales.
BACKGROUND OF THE INVENTION
A similar device is known from German Patent DE-OS 29 11 958. Herein the readily compressed bale is wrapped with a jacket in the shape of a polyethylene foil. This is effected by means of a complicated pivoting lever, which grips sideways around the bale and carries a coil with the jacket foil. The free foil end is held on the opposite side with a swivelable toe dog. The arrangement is mounted movably on a slide and is moved toward the bale in order to envelope it, simultaneously the pivoting lever makes a closing movement.
The known arrangement has a disadvantage as it is not completely automatic. The device has to be backed up from the wrapped bale with the pivoting lever opened once the wrapping is completed. Only after that, can the free end of the coil be connected to the toe dog again. The publication does not point out how this could be handled automatically. It is also disadvantageous that the jacket cannot be wrapped around the bale without wrinkles and that its tension over the width of the bale varies. This definitely requires the use of elastic, stretchable foils, which are not the optimal material for bale wrapping. In addition, the wrapped bales can only be hoop-cased once the wrapping device has moved back into its original position. Therefore the hoop-casing has to be an additional step. With regard to the resulting space requirements the realization of this wrapping device in a final compression station and its restricting supporting construction is more than questionable. All in all the known design is very complex, the operational safety is insufficient and the operation time ratio is unfavorable.
German Patent DE-OS 29 48 237 describes a bale compression device wherein the wrapping and the hoop-casing have to take place in separate stations outside the compression station. A movable foil carrier with two coils is provided for the wrapping of the bale. It wraps the jacket foil around the bale in a U-shape. For this purpose an additional and very complicated dolly and pressure ram system is required, by means of which the bale is held on a carousel table and turned from station to station on it. This arrangement cannot be realized with compression devices working with high pressure without a major density loss. Furthermore, this arrangement is also very complex and requires a long cycle time due to the use of different stations.
SUMMARY OF THE INVENTION
The present invention provides a device for the wrapping and hoop-casing of a bale in the compression station allowing for the wrinkle-free and tight wrapping of a jacket foil around the bale in a short period of time.
The process according to the present invention is for packaging pressed bales where the bale material is put into a press box and then pressed by a pressing means. The press box is then removed with the pressing means still pressing down on the bale material. Jacket material is then stretched across the bale and wrapped around the bale. The jacket material after being wrapped around the bale is held tightly against the bale by a tensioning device according to the invention and the ends of the jacket material are then welded together. All this is done while the bale material is still under compression by the press means.
This process according to the invention effects the wrapping of a jacket foil around the base, and the jacket foil is cut and welded symmetrically and quickly and evenly tensioned by means of novel wrapping device. The wrapping is wrinkle-free and its inner tension is even. Due to the arrangement of the device inside the compression station, the wrapping is very fast. The device according to the invention can even be retrofitted in existing compression stations as it requires very little space. This is even possible with carousel presses, whose available space is restricted ev
REFERENCES:
patent: 3593490 (1921-07-01), Pinatel
patent: 3640048 (1972-02-01), Zelnick
patent: 3672116 (1972-06-01), Ingmarson
patent: 3962846 (1976-06-01), Neitzel
patent: 4044529 (1977-08-01), Zelnick
patent: 4318264 (1982-03-01), Rewitzer
patent: 4408438 (1983-10-01), Rewitzer
patent: 4450668 (1984-05-01), Grossi
patent: 4738078 (1988-04-01), Benz
Hirschek Herwig
Lang Jurgen
Autefa Mashinen Fabrik GmbH
Sipos John
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