Insert for fluid container has base portion with nozzle with small diameter entrance and large diameter exit and array of air holes in shoulder portion

摘要

The base portion (1) has a circular cross-section inlet portion (2) with an open entrance (3). An annular shoulder (12) connects the lower end of the inlet portion with the upper end of the lower or outlet portion (4), which is of considerably greater diameter. The bottom end forms an open outlet (5). There is a regular array of air release holes (8) in the shoulder. There is also a cover ring (10).