The invention regards a forming box for use in dry-forming a mat of fibrous material, said forming box comprising a housing with an open bottom for providing direct access of the fibers onto an underlying forming wire and a vacuum box underneath said forming wire, at least one inlet for supplying fiber material into the inside of the housing, a number of spike rollers are provided in at least one row in the housing between the fiber inlet and the housing bottom, wherein a screen is provided adjacent said spike rollers, said screen comprising a plurality of slats, wherein each slat is rotatable.

The invention regards a forming box for use in dry-forming a mat of fibrous material, said forming box comprising a housing with an open bottom for providing direct access of the fibers onto an underlying forming wire and a vacuum box underneath said forming wire, at least one inlet for supplying fiber material into the inside of the housing, a number of spike rollers are provided in at least one row in the housing between the fiber inlet and the housing bottom, wherein a screen is provided adjacent said spike rollers, said screen comprising a plurality of slats, wherein each slat is rotatable.

A dry forming plant is described which comprises at least one distribution unit having a fibre and air inlet. Such distribution unit is placed above a forming wire opposite to at least one vacuum box which is connected to a suction unit. The distribution unit has an open bottom for release of the fibre material onto the forming wire below the distribution unit. More rotating rollers having protruding spikes are provided in the distribution unit for covering the cross sectional area of the open bottom. The vacuum box is divided into at least three longitudinal zones in a direction transversal to the advance direction of the forming wire. Said longitudinal zones have upwardly orientated intakes arranged below the forming wire. The longitudinal zones are connected with the suction unit via an outlet. The outlet comprises first shut-off means for partly or totally closing the outlet. The first shut-off means are independently operable.

A machine for non-woven fabric formation containing a rotating center shaft, at least a first and second pair of laterally spaced, interchangeable helical yarn guides, a yarn feeding wheel assembly, a fabric take up. The machine is capable of forming both square and tri-axial scrims with changes to the interchangeable helical yarn guides and yarn feeding wheel assembly.

The roller comprises a covering layer made of a fibre composite material and a cylindrical roller main body having an outer first lateral surface, a first end section and a second end section. The covering layer completely surrounds the first lateral surface in the circumferential direction. A first edge region of the covering layer extends beyond the first end section, is folded over inwards and is fixed in relation to the roller main body. In a crosslapper, the roller can be provided as a deflection roller of a conveyor belt. In a carding machine, the roller can be provided as an engagement roller for engagement with fibre material.

Device for transferring and/or introducing a fibre web, in particular a nonwoven web, into a consolidation installation, in particular one that is mechanical or hydraulic, for example a needle loom, comprising at least one transfer element comprising at least one roller (12), at least one saber (16) and an endless belt (13) extending between an upstream end and a downstream end so as to wrap around the roller at the upstream end and the saber at the downstream end, the at least one roller being arranged so as to drive the endless belt in rotation, and the at least one saber giving the downstream end of the belt the shape of a corner or lip, the at least one endless belt (13) being modular and consisting of links in the form of transverse strips that are articulated to one another, characterised in that the endless belt (13) consists of a plurality of sub-belts extending parallel to one another.

A sheet manufacturing apparatus includes a defibrator configured to produce defibrated material, a feedstock supply unit, a monitoring device, and a cleaning device. The feedstock supply unit includes a conveyance device configured to convey feedstock, a storage device configured to accumulate the feedstock conveyed from the conveyance device and supply the feedstock to the defibrator, and a measuring device configured to measure a state of the feedstock accumulated on the storage device. The monitoring device is configured to predict stopping of conveyance of the feedstock by the feedstock supply unit and activate the cleaning device when a conveyance speed of the feedstock by the feedstock supply unit becomes slower than during normal operation. The cleaning device is configured to execute on at least one of the conveyance device and the storage device a cleaning process that preemptively prevents the stopping of conveyance.

A sheet manufacturing apparatus includes a defibrator configured to produce defibrated material, a feedstock supply unit, a monitoring device, and a cleaning device. The feedstock supply unit includes a conveyance device configured to convey feedstock, a storage device configured to accumulate the feedstock conveyed from the conveyance device and supply the feedstock to the defibrator, and a measuring device configured to measure a state of the feedstock accumulated on the storage device. The monitoring device is configured to predict stopping of conveyance of the feedstock by the feedstock supply unit and activate the cleaning device when a conveyance speed of the feedstock by the feedstock supply unit becomes slower than during normal operation. The cleaning device is configured to execute on at least one of the conveyance device and the storage device a cleaning process that preemptively prevents the stopping of conveyance.

A crosslapper, a process and a formed fabric web shielding device for a cross lapper shield a formed fabric web moved in the crosslapper. The formed fabric web has a bottom side, a top side and side surfaces located at formed fabric longitudinal edges. The crosslapper includes a displaceable main carriage and a crosslapper laying belt feeding the formed fabric web in a web direction to the displaceable main carriage with the formed fabric web bottom side located on the cross lapper laying belt. The shielding device includes a housing configured to be arranged in the crosslapper and configured to cover the side surfaces of the formed fabric web located on the laying belt and being fed to the displaceable main carriage, which side surfaces extend along the web direction, to shield the side surfaces of the formed fabric web against external environmental effects.

A crosslapper, a process and a formed fabric web shielding device for a cross lapper shield a formed fabric web moved in the crosslapper. The formed fabric web has a bottom side, a top side and side surfaces located at formed fabric longitudinal edges. The crosslapper includes a displaceable main carriage and a crosslapper laying belt feeding the formed fabric web in a web direction to the displaceable main carriage with the formed fabric web bottom side located on the cross lapper laying belt. The shielding device includes a housing configured to be arranged in the crosslapper and configured to cover the side surfaces of the formed fabric web located on the laying belt and being fed to the displaceable main carriage, which side surfaces extend along the web direction, to shield the side surfaces of the formed fabric web against external environmental effects.