of the four lanes 32 at one end thereof the head pulleys 36 are attached to the head shaft 28 for rotation therewith the tail shaft 30 carries four tail pulleys 38 which are spaced apart along the tail shaft 30 so that each tail pulley is in alignment with a different one of the four lanes 32 at the opposite end thereof from the head pulleys 36 the tail pulleys 38 are attached to the tail shaft 30 for rotation therewith each lane 32 also has two spaced apart parallel endless conveyer straps 40 trained about the head pulley 36 and tail pulley 38 the cartons move with the conveyer straps 40 in each lane therefore the distance between the conveyer straps 40 in each lane is less than the width dimensions of the cartons each lane 32 is associated with a different one of the feeder conveyer devices 14 to receive cartons 12 therefrom now with reference to fig1 a first carton stop station generally denoted by the numeral 42 is operatively associated with each one of the lanes 32 of the endless conveyer belt means 18 to selectively release and stop a carton 12 moving on the endless conveyer straps 40 in each lane 32 as can be seen in fig1 and 5 the first stop station 42 is.