Method and apparatus for sorting plastic items

Details Method and apparatus for sorting plastic items Method and apparatus for sorting plastic items

1994-09-01

1996-01-23

Eley, Timothy V.

Solid material comminution or disintegration

Processes

Subjecting material to impact by moving comminuting surface

241 36, 241 99, 241187, 241236, B02C 1320, B02C 1900, B02C 2500

Patent

active

054859646

ABSTRACT:
A method of sorting plastic items by measuring the effect an item has on light directed at a stream of items from a light source, then selectively removing items from the stream based on a comparison of the light measured and the light emitted from the detector is provided. The invention also includes an apparatus for separating plastic items which comprises a light source, a detector for measuring the effect an individual item has on light emitted from the detector, and sortation means for selectively removing items from the stream based on a comparison of the light emitted by the light source and that measured at the detector. A method for separating single plastic bottles from engaged interlocked bottle clusters comprising directing an air jet at an item sufficiently forceful to displace a single bottle to a collection means but insufficiently forceful to displace an interlocked bottle cluster is also provided.

REFERENCES:
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patent: 3655138 (1972-04-01), Luscombe
patent: 3752410 (1973-08-01), Dienst et al.
patent: 4273298 (1981-06-01), Boriskin
patent: 4919345 (1990-04-01), Burlington et al.
patent: 5048764 (1991-09-01), Flament
patent: 5052630 (1991-10-01), Hinsey et al.
patent: 5215265 (1993-06-01), Lodovic
patent: 5314071 (1994-05-01), Christian et al.

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