| 摘要 |
A system for the axial feed of air to one of two air nozzles (7, 7) which together are rotatable about a longitudinal center axis (4), comprising a housing (6) having a pair of stationary air feed ducts (10, 11) each of the ducts terminating in a thrusting surface (19) perpendicular to the longitudinal center axis of the air nozzle, a gasket retainer (21) spaced from the thrusting surface, a compressible gasket (20) between the thrusting surface and the gasket retainer, and a rotatable hollow journal (23) for carrying the air nozzles at its downstream end and at its upstream end being pressed against the gasket retainer.
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