Package making – Methods – Applying a partial cover
Patent
1995-09-18
1997-08-26
Johnson, Linda
Package making
Methods
Applying a partial cover
53449, 53176, 53587, 53588, B65B 2712, B65B 1158
Patent
active
056600232
DESCRIPTION:
BRIEF SUMMARY
The present invention relates to a method for wrapping an article or object in accordance with what, and more particularly to a method in which the article is wrapped by rotating said article. Furthermore, the present invention relates to an apparatus for wrapping an article.
It is prior known to wrap articles, such as fodder bales, straw bales or pulp bales, various packages or for example smaller goods or objects loaded on a pallet or the like with a suitable wrapping material web, such as a plastic sheet or a wrapping film. Such a wrapping has been performed for example such that a sequence of articles is conveyed in the direction of movement thereof into a wrapping apparatus in which the articles pass through a rotating circular ring. The rotating ring is provided with at least one dispenser or straining device including a roll of plastic film which rotates with the ring around the article and from which plastic is unwound and wrapped around the outer surfaces of the article. A problem exists in that, in case the articles have to be separated after wrapping, there is no cover or shield provided by the wrapping material on the ends of the articles since only the sides of the articles can be wrapped with the wrapping material when the articles in the wrapping apparatus are tightly successive with their ends attached to each other. In case the articles are not separated from each other, the result is a long and heavy string of articles which is difficult to handle and in which there are a plurality of successive articles within the same wrapping film. Also, the ends of said string of articles are without a shield provided by the wrapping film against mechanical stresses and/or for example against weather conditions and sunlight.
U.S. Pat. No. 5,184,449 (Hannen) discloses a solution in which the whole rotating ring is swung 90.degree. and thus a cover is provided which is wrapped in two directions around the load on a pallet. However, the disadvantage of said solution lies on the complex and heavy structure. The supporting and the upward-downward movement of the ring in the horizontal position requires an extremely rigid construction of the apparatus and turning means whose power demand is high, especially then when the articles to be wrapped are big in size. Such a construction is naturally not suitable for applications in which the wrapping device is used as a movable unit.
Round articles, such as round bales or the like are wrapped one by one in a plastic film by devices which are provided with a rotating table and in which the bale is rotated while the dispenser dispenses the film around the bale. Such devices are disclosed, for instance, in EP Patent Application No. 0 565 055, NO Patent Application No. 884841, GB Patent Application No. 2 221 203 and SE Patent No. 467 248. However, only individual articles can be wrapped with the film by said devices whereupon the capacity of such devices is poor. Furthermore, said devices are suitable only for wrapping of cylindrical articles.
It has been found lately that, for example, in connection with fodder or straw bales or the like the formation of a round bale in a baling machine is more inefficient as to the capacity of the machine than making a so-called "square bale" of a shape of the rectangular prism. The apparatuses forming a square bale or the like can be arranged to operate continuously since the need of stopping the formation process is avoided during the binding of the article, which stopping is required when forming round bales in the baling machine. The efficiency of such machines forming square bales compared to the machines forming round bales is that much higher that they are used more and more instead of machines forming round bales, despite the fact that the wrapping of the square shaped articles is more difficult. The problem lies in the fact that there are no suitable devices for the wrapping of the parallelepided shaped articles with a weblike material. Several proposals have been made in an attempt to modify the aforementioned round articl
REFERENCES:
patent: 4694636 (1987-09-01), Griffin
patent: 4730436 (1988-03-01), Angelino
patent: 4793124 (1988-12-01), Anderson
patent: 4930292 (1990-06-01), Focke et al.
patent: 4955181 (1990-09-01), Casteel
patent: 5027581 (1991-07-01), Kovacs
patent: 5105607 (1992-04-01), Gratton
patent: 5140798 (1992-08-01), Lancaster
patent: 5184449 (1993-02-01), Hannen
patent: 5195301 (1993-03-01), Martin-Cocher et al.
patent: 5216871 (1993-06-01), Hannen
Cross Wrap Oy
Johnson Linda
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