Package making – Plural layer package material – At least one layer a band
Patent
1997-03-18
1998-09-08
Johnson, Linda
Package making
Plural layer package material
At least one layer a band
53211, 53118, B65B 1104, B65B 1158
Patent
active
058028056
DESCRIPTION:
BRIEF SUMMARY
In recent years we have seen a widespread trend of individually wrapping so-called round bales or other large bales of semi-dried grass in plastic foil based on natural anaerobic lactic acid fermentation, optionally with the addition of inhibitors to reinforce the production of lactic acid. This has more or less revolutionized fodder collection for cattle and other livestock able to digest this excellent fodder. The present invention relates to a device for the compression and packaging of such loose mass.
Previously this was a multi-step operation, including mowing, conditioning/cutting, turning, raking, compressing, ejection of a compressed bale on the meadow, transporting the compressed bale to the storage location, packaging the compressed bale in plastic using a separate machine, tipping the packaged bale, picking up and optionally stacking the packaged bale in a storage location using suitable bale handling equipment.
Devices are known from the prier art allowing compression and packaging by one single machine. One such example is shown in DE 3.805.224, which shows a compression and packaging machine whose pressing chamber is equipped with driveable rolls for turning the bale around a horizontal axis. The pressing chamber comprises an upper and lower section. The upper section may be vertically lifted so as to free an area around the middle section of the bale. The device is also equipped with a winding arm carrying a roll of plastic. The arm is rotatable around the vertical axis so as to wrap several layers of plastic around the bale. At the same time, the rolls are driven in the lower section of the chamber causing the bale to rotate slowly around a horizontal axis.
This device is not very useful in practice, due to its size.
The winding arm has to move beyond the outermost point (corner) of the upper pressing chamber. This requires the arm to extend quite far out from the axis of rotation; far beyond the outermost point of the bale, which requires the outer dimensions of the device to be undesirably large.
Moreover, the lifting of the upper chamber section requires lifting cylinders which tower well above the machine itself. These will easily get in the way, for instance when the device is needed inside a barn etc., where the ceiling height is limited.
The present invention is envisaged as integrating a number of the above-mentioned operations in one single operation, which will reduce labour consumption dramatically in the case of individual packaging of large bales e.g. of grass for farmers and agricultural contractors. In any case, it will be possible for just one man and a tractor to perform compression and packaging in one operation, which would be extremely useful to contractors. At the same time, the invention is intended to simplify the structural design of the device, making it more compact and reliable.
The present invention achieves a much more compact device. The large external dimensions resulting from a non-rotating upper chamber are avoided by placing the winding arms on the upper half of the chamber as close to the axis of rotation as possible, where they rotate with the upper half of the chamber.
Since the frame of the device is split, it is possible to place the lifting cylinders in the actual frame structure, thus avoiding the towering lifting cylinders.
The invention will now be described in detail with reference to the enclosed drawings, where:
FIG. 1 shows a rear view of the device in packaging position,
FIG. 2 shows the same in side view,
FIG. 3 shows a side view of the device in compression position,
FIG. 4 shows the device in plan view, and
FIG. 5 shows another embodiment of the device with the ejector mechanism.
FIG. 1 shows a compression and packaging device 1 consisting of a frame 2 divided into a lower 3 and an upper 4 half of the frame. Supported in the frame 2 are a lower pressing chamber 5 and an upper pressing chamber 6. There is room between the said pressing chambers for a bale 7 to be compressed and packaged.
The upper half 4 of the frame may be raised or lowere
REFERENCES:
patent: 1654258 (1927-12-01), Hooper
patent: 4685270 (1987-08-01), Brambilla
patent: 4841851 (1989-06-01), Quataert
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