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B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
B07B13/00—Grading or sorting solid materials by dry methods, not otherwise provided for; Sorting articles otherwise than by indirectly controlled devices
B07B13/02—Apparatus for grading using pockets for taking out particles from aggregates
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(AREA)
Dispositif pour recueillir la poussière, et employé conjointement avec les machines à polir et autres, à l'usage des dentistes, bijoutiers et professionnels analogues