Apparatus for producing a wrapped cylindrical bale of harvested agricultural material

A mechanism for rolling and wrapping harvested agricultural material to produce a roll bale of said agricultural material, comprising a roll bale press apparatus adapted to be moved through a field of harvested agricultural material, said apparatus having first means defining a prechamber that is disposed adjacent the forward portion of said apparatus relative to the direction of movement of said apparatus, second means defining a press region that is disposed rearwardly of said prechamber, and means for supplying wrapping material to said press region, means defining a first inlet orifice through which harvested agricultural material may pass from the exterior of said apparatus into said press region, means defining a second inlet orifice through which harvested agricultural material may pass from said prechamber into said press region, said second inlet orifice being located within said apparatus at a position above said first inlet orifice, said apparatus further including a variable position pick-up device operative in a first position thereof to direct harvested agricultural material through said first inlet orifice into said press region and operative in a second position thereof to direct harvested agricultural material into said prechamber, and transport means within said prechamber for conveying harvested agricultural material in said prechamber upwardly to said second inlet orifice.