DISCHARGE NOZZLE HAVING CONTENT BACKFLOW PREVENTIVE FUNCTION, AND LIQUID CONTAINER HAVING DISCHARGE NOZZLE

摘要

PROBLEM TO BE SOLVED: To provide a discharge nozzle which exerts a backflow preventive function without using a mechanical structure and restricts the backflow of a content and air constantly in an open state, and a liquid container having the discharge nozzle.;SOLUTION: The discharge nozzle is attached to a discharge outlet of the flexible container which is deformed by external pressure to discharge the content. The discharge nozzle has a liquid passage formed inside, and a part of the passage consists of a gap between a plurality of surfaces or fine paths having minute sections. The passage is formed to have such a size as to make the liquid content stall and hardly flow through the passage due to its viscosity or surface tension under a normal pressure. The nozzle is also provided with a check valve on a discharge opening, so that the content is discharged when a container body is pressed upon discharging the content, but the content and air in the passage of the nozzle are prevented from flowing back into the container body when the press force is removed.;COPYRIGHT: (C)2006,JPO&NCIPI