| 摘要 |
1. Means for detecting the presence of objects (C, B, E) on a conveyor belt (1) and including a photoelectric cell (4) of the reflex scanning type and a reflecting surface placed opposite the cell, characterized in that said reflecting surface is divided into at least two parts (5, 6) which form a continuous surface for the cell (4) and are disposed at both sides of the path of the objects (C, B, E). |
