Classifying – separating – and assorting solids – Sorting special items – and certain methods and apparatus for... – Separating means
Patent
1995-01-05
1997-10-21
Merritt, Karen B.
Classifying, separating, and assorting solids
Sorting special items, and certain methods and apparatus for...
Separating means
209930, B07C 704
Patent
active
056786972
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
The invention relates to a sorting installation.
A sorting installation for sorting useful products from dry refuse such as paper, glass, cardboard, plastics or the like has been disclosed in U.S. Pat. No. 3,595,389. In this installation, the mixture of useful products to be sorted is passed via conveying devices to a manual selection belt, where manual sorting workplaces having drop shafts are provided. At these workplaces, the useful products to be sorted are taken manually by the employees from the manual selection belt and placed in drop shafts arranged to the side of the operative. The drop shafts assigned to a particular useful product fraction then lead to the useful product bunkers situated below, from which the useful products can be disposed of as an individual fraction.
The device according to the U.S. Pat. No. 3,595,387 makes provision for different drop shafts to be assigned, in each case, to the operatives standing by the manual selection belt so that the operatives are each required to concentrate only on certain useful products. In general, however, it is envisaged that each operative will be required to sort out a large number of individual useful products from the manual selection station.
This type of sorting of useful products has the disadvantage that, firstly, a large number of drop shafts has to be present in each operative's section in order to dispose of the large number of useful products arising, such as paper, glass, metal, material, board, plastics, etc. This results in a high space requirement and a high mechanical effort, since the drop shafts have to be guided to corresponding bunkers with complex guide devices.
Furthermore, the sorting of a large number of useful products creates difficulties for the operative insofar as a constant process of thought is necessary in order to assign each useful product picked up by hand to a particular drop shaft.
In addition, the arrangement of the drop shafts can in some cases be disadvantageous, that is to say ergonomically unsatisfactory, since each operative has to service a plurality of drop shafts.
A remedy for this can be provided by a sorting system in which each operative sorts out only a single useful product fraction from a useful product mixture and passes this to a nearby drop shaft. Such a treatment, is, however, somewhat impracticable with a running manual selection conveyor belt, since the useful product mixture passes the operative too rapidly.
A further sorting device has been disclosed by EP-0 123 825 A2. In this sorting installation, the useful products to be sorted out are guided on a circular conveying path, beside which are arranged both manual and automatic sorting workplaces with drop shafts. With such a system, the material to be sorted can be kept in a cycle until the individual useful product fractions are sorted out. With this installation, also, the various useful products are passed by an operative into various drop shafts.
The core concept of the sorting-out of useful products is the reuse of the raw materials contained in valuable packaging material. For this purpose, the "Dual System" was established in Germany, guaranteeing that industry would take back packaging materials of all types. For this purpose, the packaging which are intended to be passed to a recycling process for reuse are provided with the so-called "Green Dot". This relates to packagings of all types such as glass, tinplate, aluminum, board/cardboard, paper, plastics and laminates. The objective is to collect on a large scale these packaging materials which are produced, to sort them and to return the recovered individual fractions to a recycling process. The problem arising here is that, in the future, huge quantities of packaging material will be produced in an unsorted state and will have to be treated accordingly.
SUMMARY OF THE INVENTION
The object of the invention is to optimize the known sorting installations with a view to being able to achieve a higher throughput. This applies in particular to manual
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Fuchs Dieter
Stehle Wolfgang
Lowe Scott L.
Maschinenfabrik Bezner GmbH & Co. KG
Merritt Karen B.
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