Agricultural machine

An agricultural machine for forming a round bale of windrowed fibrous material comprising a displaceable chassis having a forward end and a rearward end, spaced apart side plates carried by said chassis and defining the width of a bale-forming chamber, a pick-up device located towards said forward end of said chassis and adapted to pick-up fibrous material from the ground, a carrying surface on to which said fibrous material is discharged by said pick-up device, said carrying surface extending generally horizontally, and being part of a first, fixed position belt conveyor defining a bottom of said bale forming chamber and having a head end adjacent said pick-up device and a return end remote from said pick-up device and serving to carry said fibrous material away from said pick-up device, and a plurality of additional belt conveyors each having an active surface adapted to co-operate with said carrying surface of said first, fixed position belt conveyor in the forming of a round bale by the rolling of said fibrous material, at least one of said additional belt conveyors being movable by having one conveyor end pivotably mounted, so that its other end is arcuately movable from an inner position to an outer position as said round bale progressively increases in diameter, means to urge said movable conveyor towards said inner position and means to displace at least one of said belt conveyors whereby a finished bale may be discharged from a rearward end of said machine.