member 9 further comprises dispense outlets 12 communicating with the inlets and arranged in a pattern e g arranged in staggered rows on a curved and downward facing portion of the valve member 9 a flexible strip 13 made of e g metal plastic or a fiber reinforced composite optionally coated with an anti adhesive layer and or having a thickness of less than 0 5 mm e g 0 2 mm is slidably tensioned about this portion by means of one or more springs 14 on one end and a lever 14 a on the other end and kept in place by guides 15 e g raised portions defined in the valve member 9 on either side of the strip 13 the strip 13 comprises a plurality of openings 16 that have a diameter that can be slightly larger than the diameter of the outlets 12 and that correspond in shape number and pattern to the shape number and pattern of the outlets 12 the distance between the outlets 12 in the axial and tangential directions of the valve member 9 which coincide with respectively the lateral and longitudinal directions of the strip 13 is larger than the diameter of the openings 16 in the strip 13 thus as shown in fig4 a to 4c all outlets can be simultaneously cleared fig4 a respectively closed fig4 c by moving the strip fig4 b in this example by means of the lever 14 a.