US PATENT SUBCLASS 209 / 670
.~.~.~.~.~ Items move longitudinally of gauging passage varying in width along length thereof

Current as of: June, 1999
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209 /   HD   CLASSIFYING, SEPARATING, AND ASSORTING SOLIDS

509  DF  SORTING SPECIAL ITEMS, AND CERTAIN METHODS AND APPARATUS (E.G., POCKET TYPE AND LIGHT RESPONSIVE SORTING, ETC.) FOR SORTING ANY ITEMS {11}
606  DF  .~ Separating means {33}
659  DF  .~.~ Sorting items by size {3}
660  DF  .~.~.~ Item of particular size passed through gauging passage between separate elements {9}
667  DF  .~.~.~.~ Gauging passage between rotatable elements {6}
670.~.~.~.~.~ Items move longitudinally of gauging passage varying in width along length thereof

DEFINITION

Classification: 209/670

Items move longitudinally of gauging passage varying in width along length thereof:

(under subclass 667) Methods and apparatus wherein items move lengthwise of a tapered passage until they either pass therethrough or are rejected.