| 摘要 |
<p>The respirator has a face mask (1) made of rubber. In the base (10) is a diaphragm (8) forming the inlet valve, fitted over apertures (9) in a plastic ring (13, 14). To one side is the breather outlet valve (4) and a diaphragm (18) in a perforated body (16) protected by a perforated cap (19). The filter holder (5) case is retained around the inlet valve ring. The filter cartridge (20) has a deep portion (21), closed by a cover (22) and containing the active material (29). Each end of the cartridge has moulded perforations (27), pads (28) of open pore foam plastic being used to retain this. A perforated cover (6) fits over the filter base case.</p> |
