Patent ID: 8236138

Claim:
A headbox for a machine for producing a web of fibrous material from at least one fibrous stock suspension, the web being one of a paper web and a cardboard web, said headbox comprising: a feed apparatus configured for feeding the at least one fibrous stock suspension; a perforated distributor pipe plate which is located adjacent downstream relative to said feed apparatus and which has a plurality of channels which are arranged in a plurality of rows and a plurality of columns; an intermediate channel which is located downstream of said perforated distributor plate and extends over a width of the headbox, said intermediate channel including a first common supply channel, a second common supply channel, and a plurality of devices which are spaced apart from one another in a width direction of the headbox, said plurality of devices being configured for at least one of adjustable and controllable dosing of a first fluid in a first plurality of partial fluid streams into the at least one fibrous stock suspension, said plurality of devices individually and respectively including a first plurality of dosing channels for said first fluid, said first plurality of dosing channels respectively having one first dosing channel opening, said first plurality of dosing channels discharging at different heights and being connected with said first common supply channel, said plurality of devices configured for at least one of adjustable and controllable dosing of said first fluid in said first plurality of partial fluid streams into the at least one fibrous stock suspension being further configured for at least one of adjustable and controllable dosing of a second fluid in a second plurality of partial fluid streams into the at least one fibrous stock suspension, said plurality of devices individually and respectively including a second plurality of dosing channels for said second fluid, said second plurality of dosing channels each having respectively a second dosing channel opening, said second plurality of dosing channels discharging at different heights and being connected to said second common supply channel; a turbulence generator downstream from said intermediate channel and having a plurality of flow channels arranged in a plurality of rows and a plurality of columns; and a headbox nozzle including a nozzle gap, said headbox nozzle being located immediately adjacent to said turbulence generator.