dispensing system within the vacuum chamber 100 to dispense encapsulant material onto a workpiece in a vacuum will now be described in an initial step of the operation air is drawn from the upper compartment and the outlet interlock chamber using the vacuum pumps until the vacuum level is at approximately 28 inches of mercury a first workpiece 142a is then loaded through the inlet slot 130 into the inlet interlock chamber 122 as the workpiece enters the inlet slot 130 the conveyor 138 in the inlet interlock chamber is activated to draw the workpiece into the interlock chamber the pneumatic door 126a at the inlet slot 130 is then closed pneumatic door 126b at the outlet slot 132 of the inlet interlock chamber is also in the closed position next air is drawn from the inlet interlock chamber using one of the vacuum pumps until the vacuum level within the inlet interlock chamber is at approximately 28 inches of mercury the pneumatic door 126b at the outlet slot 132 of the inlet interlock chamber is then opened and conveyor 138 in the inlet interlock chamber and conveyor 140 in the upper compartment 104 are used to move the workpiece 142a from the interlock chamber to the dispensing location in the upper compartment material is then dispensed onto the workpiece.