120 comprising another alternative embodiment of conveying means 20 is shown in this embodiment the singulator bed is populated with an array of short belts 122 that support conveyed material each belt 122 is wrapped around two idler rollers 124 that support the weight of the conveyed material and a third idler roller 126 well below the surface of the bed as shown idler rollers 124 and 126 are mounted on a frame 132 frame 132 is in turn pivotable around drive engagement pivot pin 134 a solenoid 136 or similar actuator is coupled to a lower section of frame 132 in order to selectively pivot the frame drive rollers 128 and 130 are mounted adjacent to lower idler roller 126 and are operated at rotational speeds corresponding to entry velocity v e and exit velocity v x respectively as will be appreciated actuator 136 may selectively pivot frame 132 causing belt 122 to be engaged by either of drive rollers 128 and 130 surfaces of which are moving at either entry velocity or exit velocity where the belt wraps around idler roller 126 thus the drive for each belt 122 maybe intelligently selected corresponding to either entry velocity v e or exit velocity v x to move one or more parcels downstream while retarding others as required to achieve a downstream flow of single pieces separated by a controlled minimum gap as discussed in connection with fig7 12 fig1 illustrates a two roller locally driven belt continuous mode apparatus corresponding to yet another embodiment of conveying means 20 the apparatus 150 is in all respects similar to the apparatus.