| 摘要 |
<p>An air bag (9) for a half-closed type breathing device (1) is a seamless integrally molded piece which is blow molded from urethane resin. An opening of this air bag (9) is constructed so as to be screwed into the main body of the half-closed type breathing device (1) for fixation, whereby replacement work can easily be performed. Since there is no seam formed in the air bag according to the present invention, there is no need to inspect the strength of a seam, facilitating the production control. Since the air bag (9) is molded from urethane resin, the durability and the like thereof can be improved. In addition, since the air bag (9) is blow molded, uniform size and high productivity can be realized.</p> |
