| 摘要 |
The invention relates to screening or sieving devices with screening or sieving netting which is subjected to a large degree of wear and is not easily accessible for visual monitoring. The invention is characterised in that the screening or sieving netting (2) bears a line loop (7) which is connected to an electrical monitoring device and is interrupted or short-circuited when a hole is made in the sieve netting (2) or a specific degree of wear occurs in it, and as a result the monitoring device is actuated. <IMAGE> |
