| 摘要 |
<p>A non-refillable pour spout (10), for use in the neck (18) of a bottle to prevent introduction of liquid into the bottle but permit liquid already within the bottle to be poured from the bottle in any direction, includes a pair of check valves (46, 59) ina liquid pouring duct (30) and a third check valve (74) in a separate air entry conduit (36) which extends through the pour spout alongside the liquid pouring duct. The pour stout (10) fits within the neck (18) of a bottle, where it is retained sealingly by a plurality of flexible collars (20) extending about the circumference of the pourer spout. The liquid pouring duct (30) terminates in a liquid discharge tube (32) and a horizontal flange (34; 134) extends radially about the upper end of the liquid discharge tube (32), a small distance above the upper end of the air entry vent conduit (36), to protect the air entry vent conduit against introduction of liquid and to permit liquid to be poured in any direction without spilling into the open end of the air entry conduit. A valve closure body (50) in one of the check valves (46) in the liquid pouring duct (30) is less dense than the liquid for which the valve is intended to be used.</p> |
