| 摘要 |
<p>In the device described, the paper rests on a support, and a sensor which is responsive to the position of the surface of the paper is arranged in a mobile manner, the position of said sensor being detected by a measurement device. The device described is characterized in that a system is provided for producing an air cushion on the upper surface of the paper, and in that the sensor is designed and arranged in such a manner that it is carried by the air cushion. In this way any damage to the paper is avoided and the paper thickness can be measured precisely.</p> |
