Pneumatic grain sowing machine

摘要

The pneumatic grain sowing machine has a perforated disc (7) rotating about a horizontal axis and provided with suction holes (8) set in a circle of hole holes wherein underpressure is set up on the one side whilst the seed is supplied on the other side. A scraper (12) for the seed grains adhering to the perfroated disc is mounted partly engaging over the edge of the disc where it is set resiliently against same and can swivel about an axis mounted outisde the edge of the disc. The scraper is pref. a flat plate which is supported by set screws outside the disc perimeter. The scraper can be adjusted to suit the size of the seeds.