| 摘要 |
The device is for selecting objects on the basis of their suface colour tone and comprises an optical colour tone detector (21, 22, 23), an inclined chute (10) for feeding the objects to the detector, and a rejecting device in the form preferably of an air injector (24) operable in response to the colour tone detecting means for rejecting objects other than those having a preselected colour tone or range of colour tone. The chute (10) has a corrugated feed surface, troughs (13) of which extend rectilinearly and in the direction of the extent of the chute from the upper to the lower ends thereof. Preferably, each corrugation is made of two generally planar portions each inclined with respect to the general plane of the corrugation feed surface at an angle between 1 DEG and 20 DEG . |
