A distributor machine for distributing fibrous materials comprises a bale chamber 6 for receiving fibrous materials, a shredder device 10 for shredding the fibrous materials, a barrier device 44 associated with the shredder device for holding back or recirculating shredded materials, and a blower device 8 for distributing shredded materials fed through a feeding gap 47 from the shredding device to the blower device. The distributor machine includes a regulator device 44 for regulating the feeding of shredded materials through the feeding gap 47, said regulator device 44 being moveable between a closed position in which feeding of shredded material is obstructed and an open position in which feeding of shredded material is substantially unobstructed. A method of distributing fibrous material comprises actuating the blower and shredder device and when the blower reaches a predetermined operating speed, opening the regulator device.
