Face mask for respirator has rigid shell with gas feed duct and flexible lip seal with adjustable mounting

摘要

The face mask for a respirator has a rigid shell (1) with a gas feed duct (2) into the cavity (C). A flexible lip (3) seals the mask to the face and can be positioned accurately by an adjustable mounting. The degree of deformation of the lip at different points on the face can be controlled to optimize sealing.