Method and apparatus for sorting contaminant material from proce

Details Method and apparatus for sorting contaminant material from proce Method and apparatus for sorting contaminant material from proce

1977-06-15

1979-04-03

Knowles, Allen N.

Classifying, separating, and assorting solids

Sorting special items, and certain methods and apparatus for...

Condition responsive means controls separating means

209941, B07C 500

Patent

active

041476204

ABSTRACT:
A contaminant sorting device for sorting contaminant material such as metal and rocks from process materials such as wood chips which are intended to be subsequently processed, comprises a material receiving surface upon which a layer of material is deposited which material contains both contaminant and process material, an impact sensing device for sensing vibrations of the material receiving surface upon impact of the material thereon, an electronic circuit for distinguishing between signals generated by impact of contaminant material from signals generated by impact of process material and for providing an output signal in response to receipt of a contaminant material signal, a flow diverting plate downstream from the material receiving surface which is activated by the signal produced in response to impact of the contaminant material so that the normal flow path of the layer of material is interrupted so as to divert that portion of material containing contaminant material to a separate receptacle, and time delay means for deactivating the flow diverting plate so as to return the subsequent layer of material to its normal flow pattern.

REFERENCES:
patent: 3127016 (1964-03-01), Baigent
patent: 3394806 (1968-07-01), Vaillette

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