Method and apparatus for sorting a gas-driven stream of generally flat and lightweight articles
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United States of America Patent
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Aug 23, 2011
Grant Date -
Apr 17, 2008
app pub date -
Oct 19, 2005
filing date -
Nov 1, 2004
priority date (Note) -
Expired
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Abstract
A method and apparatus for sorting a gas-driven stream of generally flat and light-weight articles of varying dimensions execute a, preferably optical, inspection and upon so finding a non-conforming article remove the latter from the stream. In particular, the inspection and the sorting are executed during a substantially straight movement of the articles. The removing is executed through gas driving in a direction substantially transverse to the straight movement. Advantageously, the inspection is preceded by orienting the articles through a centrifugal force that orients said articles against an inclined wall in a transition to the vertical movement. Also airflow means (83,84) can be used to confine the articles in a thin layer.
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