26 and away from the right post 20 the right reduced gate section 25 also moves forward toward the pitch such that interference is avoided the latch projection 54 serves to push the left gate 26 open slightly ahead of the right gate 24 by acting upon the left reduced gate section 27 of the left gate 26 the right pneumatic device 76 is also shown pivotally attached urging and biasing the right gate 24 from closed position condition of fig6 through the intermediate position condition of fig7 and toward the open condition position shown in fig8 as shown in fig9 a view of the right gate 24 with an exploded view of the top right four bar hinge 30 in the open condition position and slightly vertically foreshortened is shown for purposes of demonstration and clarity to best show and reveal the long bar gate end 110 and the short bar gate end 104 the long bar gate end 110 and the short bar gate end 104 are both pivotally connected to a rib 112 of the right gate 24 the rib 112 is a three sided horizontally oriented member near the top of the right gate 24 the rearward portion of the rib 112 is open and the short bar gate end 104 and the long bar gate end 110 are pivotable connected to the bottom side of the rib 112 preferably by shoulder bolts the rib 112 is notched on the bottom side.