| 摘要 |
The invention relates to a machine for producing cardboard cutouts, comprising a magazine (3) which projects outside the closed chamber of said machine, and a window (10) in one of the walls of said chamber for feeding said cutouts into said chamber. Said machine includes at least two associated sensors (15 and 16), which are positioned in the immediate vicinity of the window (10); said sensors are slightly offset such that, in particular, one or the other causes the complete and absolute stoppage of the machine before said window is opened. The two sensors (15, 16) are of different types, and the operations thereof are based on separate physical principles: one (15) of the sensors consists of a photoelectric cell, and the other sensor (16) is an ultrasonic sensor. |
