Flask opening and closing device, has closing shutter with controlled opening unit to assure complete tilting of shutter in opening, according to constant force value and movement applied to shutter

摘要

The device has a cap (2) with a locking system for providing a link to a closing shutter (3). The system is destined to cooperate on sealed opening with a hole (5) located on an upper part of the cap. The closing shutter has a controlled opening unit (6) destined to assure a complete tilting of the shutter in opening, according to a constant force value and a movement applied to the shutter.