VENTILATION DEVICE WITH ENTRY DRIVING UNIT AND CONNECTION PORTION FOR DRIVING HEADINGS

摘要

A device for ventilating driving headings 1 a heading machine 3 comprises a feeding air duct 4 with an intermediate secondary outlet 15 and dust-removing ventilation duct 7 with a dust-trapping device 8. The secondary outlet 15 provides forming dust-protecting screen 20 which moves slowly to the dead face center 14 and ensures that dusted air without harmful turbulences can be reliably drawn into the dust-trapping duct 7 or directly into a dust-trapping device 8 for further cleaning.