Patent ID: 6932241

Claim:
A nozzle to be provided at a head of a fluid container, comprising: at least two flexible sheets superposed with each other and welded to each other along peripheral portions thereof so as to define a nozzle body having (i) welded portions that form said nozzle body having a greater width on an upstream side of said nozzle body than on a downstream side of said nozzle body, and (ii) inner surfaces, defined by respective inner surfaces of said at least two flexible sheets, that are in contact one with another such that after contents are filled into the fluid container said inner surfaces in contact with each other define a seal so as to prevent leakage of the contents from a downstream end of said nozzle body, which seal is designed to be broken upon the contents being forced toward said upstream side of said nozzle body via an internal pressure of the fluid container, wherein said nozzle body defines an opening that has a cross-sectional area at said downstream side that is less than a cross-sectional area of said opening at said upstream side.