In the latter case, the lower apron is activated by the operator's restarting the power takeoff shaft, which previously has been disengaged, thereby causing the bale to be urged rearwardly out of the machine and onto the ground. These and other objects and advantages are obtained by providing in a crop roll forming machine adapted to be towed across a field control means affixed to the frame movable between at least a first position and a second position for cooperative interaction with the drive means and the reversibly rotatable bale forming means to selectively cause the bale forming means to cease being driven in a first direction and cause it to be driven in an opposing second direction when the control means is moved from the first position to the second position so that a completed crop roll is ejected rearwardly from the roll forming machine onto the ground. In both cases, since these large cylindrical compact bales can vary in weight from as much as 850 to 1500 pounds or more, quite frequently a bale comes to rest at a position which is within the arc followed by the tailgate when it travels from its open or raised position to its closed or shut position.

The drive means impart a sufficiently powerful ejective thrust to the completed crop bale as it exits the roll forming region to enable it to generally roll clear of the arcuate path of travel followed by the tailgate as it closes. Only detail changes would occur to this basic design through 1954. Wheelbase crept up to 115 inches for a revised model slate that started with a cheap Mainline Tudor/Fordor, business coupe, and two-door Ranch Wagon, followed by Customline sedans, club coupe, and four-door Country Sedan wagon. Extensible support arms 98 and 100 are shown in more detail in FIG. 10. Arm 100 is fastened at its upper end to bracing member 35 of the upper frame or tailgate 20 by a stub pin 108 and bushing 109, both of which are inserted through a suitably sized opening in coupling extension 110. Support arm 100 has an upper base member 111 with a spring 112 inserted within its hollow upper portion. Drive means 19 is connected to the power takeoff shaft 12 of FIG. 1 of the tractor 11 through a series of connecting shafts and gearboxes best shown in FIG. 7. Connecting shaft 60 connects to the shaft 12 of FIG. 1 at a universal joint 62 above draft member 15. Shaft 60 then joins input shaft 61 via another universal joint 63. Input shaft 61 is rotatably fastened to draft member 15 via support bracket 64, best shown in FIGS.

The upper bale forming means or upper apron 46 travels about the periphery of the roll forming machine 10 on a series of appropriately mounted idler sprockets 48,49,50,51 and a drive sprocket (not shown) mounted about a reversible rotatable shaft 52. Shaft 52 is suitably rotatably affixed or mounted to vertical frame member 26. A takeup mechanism indicated generally by the numeral 54 is fastened to bearing brackets 55, shown in FIG. 1 which are in turn secured to the upper portion of vertical member 26. The takeup mechanism 54 further includes a pair of pivotable parallel arms 56, one being positioned on each side of the frame. The takeup mechanism pivots about a bearing 58 and thereby allows the upper apron 46 to be played out and about the periphery of expanding crop roll R. The upper apron 46 passes about sprockets 59 mounted on the end of each of the takeup arms 56. The upper apron 46 is preferably comprised of a pair of roller link chains (not shown) transversely spaced apart on opposing sides of the machine 10 which are interconnected by a series of spaced apart parallel crop engaging members which combine with the roller link chains to form a rotatable curvilinear crop engaging surface.

The form and adjustment of e' govern the shape of that part of the awls between its haft and shaft, and the form and adjustment, o', the shape of the point, and, as o' is adjustable along the length of q, any length of awl or needle within the limits of the machine can be brought to a point. Support arm 139 is movably affixed to lifting arm 145 at a point suitably located along its length. Support arm 98 similarly is mounted about pin 108 and bushing 109 at the upper portion of the base member 118. Inserted within the hollowed lower end of base member 118 is the telescoping portion 119. The lower portion of telescoping member 119 has a roller pin 120 fixed thereto and about which idler 91 is rotatably mounted. Idler 99 is rotatably mounted about roller pin 116 which passes through the legs of bracket 115. Spring 112 serves to keep sufficient tension via idler 99 on belt 84 to permit the transfer of rotary drive power when the tailgate 20 is in the closed position. The arcuate movement of the tailgate, in conjunction with spring 105, causes the idler 99 to be sufficiently raised to reduce the required tension to interrupt the transfer of the rotary drive power of belt 84. Belt 75 is continuously maintained under tension as the tailgate 20 is raised by the cooperative pivotal effect of idlers 90 and 91 and spring 101 so that rotary driving force is continuously transferred from sheave 74 to sheave 76. As the tailgate continues to be raised towards its fully extended position, a second predetermined point is reached where the arm 98 is in a position which causes the idler 91 to pull the drive belt 75 sufficiently upwardly and rearwardly that it back wraps about multiply grooved sheave 85. The combined cooperative effect of idlers 90,91, spring 101 and arm 98 creates greater tension on the back wrapped drive belt 75 when the tailgate is in the raised position than when it is in the lowered or closed position.

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