Inner mask for a breathing mask has stepped air inlet openings behind the sealing edge with the air channels for an effective seal for all facial structures and reduced air resistance on inhaling

摘要

The inner mask structure, for a breathing mask, has stepped air inlet openings (1) behind the sealing edge (2) of the inner mask with the air channels (3). The air inlet openings (1) transit directly into the air channels (3). The air inlet openings (1) and the air channels (3) are arranged symmetrically or asymmetrically at the sides of the inner mask, and the air channels (3) are aligned to the center of the leading inner mask.