vicinity of each support wire 42 a scoop tine 73 extends generally inwardly and downwardly from the sheet rake assembly 30 in order to scoop the cover 22 up from the support wires 42 and on to the sheet rake assembly itself thus preventing the cover from becoming trapped under the sheet rake assembly the gathering tine 32 describing an arc commencing upwardly and rearwardly of the sheet rake assembly 30 holds the cover atop the assembly as the assembly moves toward the center of the framework 20 collecting the cover as it moves both tines are aluminum have a rounded surface and are about 18 inches in length the running rigging 34 referred to above moves the sheet rake assembly 30 outwardly and inwardly along the support wires 42 as shown in fig1 the running rigging 34 includes four winches 36 and 37 each of which moves three cables 74 and 76 the outward pulling winches 36 take in those cables 74 that move the cover into the covering position by pulling the sheet rake assembly towards the edge rows 40 while the inwardly pulling winches 37 take in cables 76 that pull the cover back to the center each winch 36 and 37 the locations of which are described below carries three cables one connected to the center of the sheet rake assembly and one on each side the cables attached to the sides of the sheet rake assembly are placed at a suitable distance from the center of the framework 20 so that the pulling force of the cables is distributed uniformly along the length of the sheet rake assembly the inward pulling center cable 76 as is shown in fig3 and 4 is lead by a block.