Classifying – separating – and assorting solids – Sorting special items – and certain methods and apparatus for... – Separating means
Patent
1997-03-17
1999-10-26
Nguyen, Tuan N.
Classifying, separating, and assorting solids
Sorting special items, and certain methods and apparatus for...
Separating means
209630, 209919, 209930, B07C 704
Patent
active
059711620
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD OF THE INVENTION
The present invention concerns the sorting of solid products, for example ordinary domestic or industrial waste, in order to select waste that can be recycled economically.
The waste to be sorted may comprise all forms of articles made from paper, plastics material, glass, metal, wood or any other material. Sorting separates the waste articles according to their nature or their composition, to enable subsequent selective processing.
Methods and installations for sorting waste are already known, for example the method and device described in document U.S. Pat. No. 5,249,690. In this document, an installation for sorting waste comprises at least one generally linear main conveyor, associated with a linear return conveyor to form a closed loop, and with secondary conveyors and auxiliary conveyors linked to the main conveyor by manual sorting stations. An installation of this kind is particularly complex, requiring a multiplicity of conveyors, and takes up a great deal of room, divided between several floors of a building, and its cost is high.
There are also known, from documents GB-A-566 183 or EP-A-0 123 825, devices for manually sorting waste in which the presentation system is a horizontal annular turntable, with a fixed oblique flap diverting the waste radially at the end of the sorting area. The width of the annulus is limited, to enable the operative to reach the waste that it carries.
Document DE-A-34 10 901 describes a rotary table for automatic sorting of articles, with two-position flaps selectively ejecting articles to respective receptacles at the periphery. There is no provision for access to the articles by manual sorting operatives.
SUMMARY OF THE INVENTION
The problem to which the present invention is addressed is that of designing a new manual sorting device, and an associated method of using it, providing good access to the waste to enhance the quality of manual sorting by one or more operatives, and to reduce significantly the overall size of the sorting installation, combined with the provision to receive the contents of a garbage truck.
Another object of the invention is to make a sorting device more flexible in use, by enabling a variable number of operatives not dedicated to sorting a single category of objects to use the same device.
Another object of the invention is to enhance the quality of sorting, by facilitating exhaustive sorting of the content of the waste to be sorted that can be recycled economically.
To achieve the above and other objects, a device for manually sorting waste comprises at least one operative station at the periphery of a closed loop presentation system, with means for introducing the waste to be sorted onto the presentation system. Furthermore, in accordance with the invention:
the presentation system is a horizontal and generally annular rotary tray, delimited by an outside edge and by an inside edge, and rotated about a coaxial vertical axis by drive means,
the inside edge surrounds a central space,
waste infeed and discharge means are disposed near at least one of the inside and outside edges,
adjustable pushing means push the waste on the rotary tray selectively and adjustably in the radial direction at least towards the outside edge, to move it selectively towards the outside edge and to make it accessible by the operative occupying the operative station,
the adjustable pushing means selectively push the waste on the rotary tray radially and progressively to at least one of the inside and outside edges, and tip it onto the waste infeed and discharge means,
the operative station comprises at least one structure for infeed and discharge of selected waste shaped and disposed for infeed and discharge of waste selected by the operative occupying the operative station.
Because of the pushing means, the rotary tray can have a relatively large width, greater than that enabling an operative to reach all of the waste passing in front of him on the rotary tray. The waste can be progressively pushed radially towards the outside
REFERENCES:
patent: 2842265 (1958-07-01), Bozeman et al.
patent: 3707228 (1972-12-01), Conrad
Allagnat Bernard
Bodinier Marc
AKROS Societe a responsabilite limite
Eilberg William H.
Nguyen Tuan N.
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