34 activated 34 by bringing the second component 150 into contact with the first component 118 further the ram 160 reaches its forwardmost limit of travel as depicted in fig1 once the barrier 137 opens and the tabs 133 fracture as a consequence sufficient space is available in the chamber 116 for mixing the first component 118 with the second component 150 and undue reduction in the space is avoided the forwardmost limit of movement of the ram 160 also essentially prevents dispensing of the components 118 150 through the outlet structure 122 when the capsule 110 is in the first orientation so that dispensing of an unmixed preparation is not likely to occur next the capsule 110 and the ring 131 are removed from the receptacle 168 the capsule 110 is placed in an amalgamator and the amalgamator is activated for a sufficient amount of time to thoroughly mix the components 118 150 in the chamber 116 to form a preparation subsequently the capsule 110 is returned to the receptacle 168 in a second orientation as shown in fig1 and 13 wherein the groove 127 engages a second generally u shaped retention member 173 of the device 112 next the plug 123 is removed from the outlet structure 122 the lever of the device 112 is then moved to advance the ram 160 and thereby shift the piston 134 from its position as shown in fig1 and toward its position as shown in fig1 causing the preparation to be dispensed through the outlet structure 122 to ease use the handles of the dispensing device are not fully closed i e are not adjacent one another when the ram 160 reaches the end of.