| 摘要 |
<p>Apparatus (10) for pressurizing the headspace of a filled plastic bottle (12) while applying a cap (14) includes a sealing ring (24) having a surface for engaging a support ring (28), or other surface of known dimension, of the plastic bottle (12), clamping apparatus (32) for moving the sealing ring (24), a chuck (48) for holding the cap (14) in a position to engage a finish of the plastic bottle (12), a pressure chamber (36) surrounding the chuck (48) having a sealing surface (42) for contacting the sealing ring (24), a source of pressure (60) coupled to the pressure chamber (36) for introducing a volume of gas or vapor at super-atmospheric pressure into the chamber (36), and a motor (54) for rotating the chuck (48) and cap (14) within the pressure chamber (36) while the chamber is subjected to the gas or vapor at super-atmospheric pressure to seal the gas or vapor within the headspace of the filled plastic bottle (12) with the cap (14).</p> |
