| 摘要 |
<p>Mask formations 2 of a laryngeal mask airway are made from two tracks 21 and 22 of sheet plastics material. Each sheet track comprises two layers 23 and 24, 32 and 33 sandwiching ring-shape reinforcements 28, 36 between them. A station 30, 34 along each track 21, 22 pressure-vacuum forms the regions of the reinforcements 28, 36 into cuff members 9 and 8. The two tracks 21 and 22 come together to a station 50 and the cuff members 9 and 8 are joined to opposite sides of mount members 7, positioned between members 9 and 8 by a station 40, to complete the mask formations 2. This last step may be achieved by a push-fit arrangement, by welding, by a cut-punch arrangement or by a combination of any of these. Liquid foam could be injected into the cuff after attachment to member 7 or by positioning a pre-formed foam sheet between the cuff and member 7 prior to joining these two components.</p> |
