In the preferred embodiment, the means for allowing {TAIL ~ movement} between mounted positions and {HEAD ~ the valve} means responsive to the movement therebetween utilize common structural elements, thereby reducing greatly the complexity and production cost of dispenser 20 
In the preferred embodiment , the means for allowing { TAIL ~ movement } between mounted positions and { HEAD ~ the valve } means responsive to the movement therebetween utilize common structural elements , thereby reducing greatly the complexity and production cost of dispenser 20
OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH