Abstract: An apparatus for detecting and removing abnormal balls among a large number of balls, most of which are good separate balls, comprising (a) a rotatable, cylindrical, ball-holding means comprising a large number of ball-receiving cavities each receiving one ball; (b) a means for detecting part of a ball projecting from each ball-receiving cavity in a detection region substantially at a top of the cylindrical ball-holding means; (c) a ball-supplying means disposed on the cylindrical ball-holding means upstream of the detection region; (d) an abnormal ball-removing means disposed downstream of the detection region on the cylindrical ball-holding means; (e) a means for collecting good separate balls downstream of the detection region; and (f) a means for carrying out the determination of abnormal balls based on the detection information of projecting portions of the balls obtained by the projecting ball-detecting means.

Abstract: An apparatus for detecting and removing abnormal balls among a large number of balls, most of which are good separate balls, comprising (a) a rotatable, cylindrical, ball-holding means comprising a large number of ball-receiving cavities each receiving one ball; (b) a means for detecting part of a ball projecting from each ball-receiving cavity in a detection region substantially at a top of the cylindrical ball-holding means; (c) a ball-supplying means disposed on the cylindrical ball-holding means upstream of the detection region; (d) an abnormal ball-removing means disposed downstream of the detection region on the cylindrical ball-holding means; (e) a means for collecting good separate balls downstream of the detection region; and (f) a means for carrying out the determination of abnormal balls based on the detection information of projecting portions of the balls obtained by the projecting ball-detecting means.