LIQUEFIED GAS APPLYING NOZZLE

摘要

In order to apply liquefied gas (G) to a head space (2) without causing variation in the internal pressure of a container, a liquefied gas applying nozzle (12) includes a cylinder (17), and a plug (18) slidably inserted into the cylinder (17). A plurality of grooves (19) through which the liquefied gas (G) flows is formed on the inner periphery of the cylinder (17) in parallel to the cylinder axis. The groove (19) has the substantially constant depth and the width gradually decreasing from the inlet side toward the outlet side of the cylinder. With this configuration, the amount of the liquefied gas (G) discharged from the outlet side of the cylinder can be gradually reduced as a tip of the plug (18) moves from the inlet side toward the outlet side of the cylinder. Furthermore, the liquefied gas flowing out of the grooves at the cylinder outlet can be discharged into the head space (2) in narrow streams substantially parallel to the cylinder axis, irrespective of where the tip of the plug (18) has moved.