| 摘要 |
The invention relates to a dispensing head for a liquid to be dispensed as a drip from a receiving bottle, comprising a hollow-body insert mounted in the bottle neck, a dropper tip joint with the insert and having a central channel leading to an expulsion orifice, and also an anti-bacterial filtering membrane, made to be partially hydrophilic and partially hydrophobic, which is placed across the flow of liquid and air at the base of said dropper tip in order either to allow the passage of a liquid in the direction of delivery or to allow, in the reverse direction, the passage of air required to enter in compensation after a delivery of liquid, said insert containing a porous pad regulating the flow of liquid passing through it in the direction of said membrane. The insert end part positioned along liquid flow beyond said pad has a base formed by longitudinal arches and a central plate supported by them made so that open passages are formed between said arches positioned at the outlet of the dispensing head to form several radially directed air flows from the air flow entering into the head to compensate the delivered fluid. |
