Head and method for mounting a dispensing member on the neck of a container

A mounting head for mounting a dispenser member on a neck of a fluid reservoir so as to constitute a fluid dispenser, the mounting head comprising a mounting member configured to impart an axial mounting movement to the dispenser member, which movement brings the dispenser member from an axial arrangement placed on the neck into a leaktight final mounted position on the neck;

• the mounting head comprises a plurality of mounting tabs that are configured to be lowered axially so as to bring the dispenser member from the axial arrangement towards the final position, and that are configured to move radially inwards so as to return the dispenser member into an axial arrangement when the dispenser member has been placed in an offset manner on the neck, the mounting head further comprising an outer clamping collar for sliding over the mounting tabs to move the mounting tabs radially inwards from a spaced-apart rest position;
• and
• wherein the clamping collar is dimensioned to move the mounting tabs from a free unstressed state to a stressed state in which the mounting tabs are displaced radially inwards so as to return the dispenser member into an axial arrangement when the dispenser member has been placed in an offset manner on the neck;
• and
• wherein each mounting tab comprises a rod portion that extends parallel to the axial mounting movement and an appendage at a lower distal end of the mounting tab, such that when the clamping collar moves axially downward around the appendage, the appendage is displaced radially inwards to return the dispenser member into the axial arrangement when the dispenser member has been placed in an offset manner on the neck, and when the tab is axially lowered, the appendage abuts an axially facing surface of the dispenser member and axially pushes the dispenser member in the final position.