| 摘要 |
Apparatus and method for detecting and removing foreign substances 2' mixed with manufactured articles 2 by detecting and comparing the infrared rays reflected by each product 2,2' with a predetermined reference value to identify each product 2,2' and actuating an ejection mechanism 10 to remove the foreign substances 2' based upon the comparison result. In the embodiment illustrated, a filter 6 for passing only infrared radiation is interposed in the path of the reflected light. Alternatively, (Fig. 2), such a filter 6 may be interposed in the path of the incident light. In a further modification, the wanted product instead of the foreign substance may be separated from a mixed stream. A plurality of assemblies may be positioned around an observation station. <IMAGE> |
