A manufacturing process to produce a laryngeal mask substantially as described in UK Patent GB2205499B consists in a mould which manufactures the inflatable annular ring formation of the device in an inverted form. This allows a more rigid core in the cavity mould or alternatively a dip-moulding process,...http://www.google.es/patents/US5305743?utm_source=gb-gplus-sharePatente US5305743 - Artificial airway device
