Classifying – separating – and assorting solids – Precedent preparation of items or materials to facilitate... – Sorting special items or sorting by methods and apparatus...
Patent
1987-09-09
1989-03-07
Lacey, David L.
Classifying, separating, and assorting solids
Precedent preparation of items or materials to facilitate...
Sorting special items or sorting by methods and apparatus...
209 10, 209 12, 209 39, 209173, 241 20, 241 24, 241DIG38, B03B 528, B03B 536
Patent
active
048098540
ABSTRACT:
A flotation apparatus used in reclaiming resin materials from bottles and other scrap articles each comprising a first low density resin component (e.g., polyethylene) bonded to a second high density resin component (e.g., polyethylene terephthlate); the scrap articles are granulated and air classified to form a primary particulate scrap which is flotation separated in two successive stages. The flotation separation stages each include a first auger in an apertured-bottom trough positioned near the top of a flotation tank with inlet means depositing a flow of particulate scrap and flotation liquid into one end of the trough; the heavy material output is afforded by a second auger in the bottom of the tank, whereas the lightweight material outlet is an overflow weir at one side of the tank. A vigorous washing apparatus using a hot aqueous medium connects the first flotation stage to the second, and a feedback connection conveys low density scrap back from the second flotation stage to the first such stage.
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Nelmor/Weiss Densification System, Nelmor Co., Bulletin No. 11-105.1.
Nelmor/Weiss, Bold Series Central Station Granulators, Nelmor Co., Bulletin No. 3-105.2.
Lacey David L.
Lithgow Thomas M.
Nelmor Co., Inc.
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