referring now to the drawings , and more particularly to fig1 , there is shown a schematic side view of a former 10 , which in this example is a suction former of a machine for the production of a fibrous web that may specifically be a paper or cardboard web . a headbox 12 that is allocated to this former 10 includes a stock suspension feed 14 , at least one turbulence block 18 that is equipped with several channels 16 and a headbox nozzle 20 whose suspension stream 22 strikes an exposed , that is an open surface 24 ′ of dewatering belt 24 , which in this example is a wire . turbulence generating elements 26 , in this example turbulence generating inserts , are allocated to at least one section of channels 16 , in order to create turbulent flows 28 in the suspension substreams that are guided through the channels ( also see fig2 ). these turbulent flows 28 are illustrated schematically in fig2 - 2 d , which show front views of various designs of the turbulence generating inserts , in the direction of arrow v in fig1 . the side of suspension stream 22 facing away from the dewatering belt 24 is covered at least partially by wall 30 . in the present example wall 30 is stationary , installed preferably adjustably on headbox 12 . as can be seen in fig1 , wall 30 can , for example , be connected via link 32 with headbox nozzle 20 . wall 30 that is mounted on headbox nozzle 20 in this manner can be adjusted through pivoting by adjustment elements 34 . headbox nozzle 20 can , for example , be sectioned by at least one lamellar plate 36 . as can be seen in fig1 , wall 30 is curved at least slightly in the area of coverage . wall 30 can , for example , be located in an area opposite forming roll 38 . in the present example wall 30 is curved in accordance with a radius of curvature r 1 , that is larger than the radius r 2 of the forming roll 38 . wall 30 can include an upper wall shown at 30 and lower wall 30 ′. lower wall 30 ′ has a lower wall length not greater than 90 %, preferably 60 %, especially 30 % of an upper wall length . stationary wall 30 can for example cover a circumferential length l of forming roll 38 , that is in a range of approximately 100 to approximately 400 mm . in fig1 the circumferential angle of forming roll 38 resulting from a respective circumferential length l is indicated as “ α ”. the stationary wall may be rigid , deflection resistant or not deflection resistant . curvature radius r 1 of wall 30 can , if necessary , be larger than or equal to radius r 2 of forming roll 38 . in certain instances a smaller curvature radius r 1 is also feasible . in the example illustrated in fig1 an additional dewatering belt 40 , especially a wire is provided that is brought together with dewatering belt 24 at a location a . furthermore , at least one disturbance body 60 of at least one nozzle wall 30 is designed as preferably a discontinuous tapering of cross section 64 ( shown as broken lines ). the tapering of the cross section may however also occur continuously and / or randomly . in the present example wall 30 is impermeable to water . as can be seen especially from the following design examples , this type of wall may basically also be water permeable , especially if a movable wall or a wall in motion is provided in the embodiment of a dewatering belt , such as especially a wire . fig3 and 4 are schematic illustrations of headbox 12 including tube generator 42 that is equipped with several channels 16 whereby turbulence generating elements are allocated to at least a section of channels 16 , in order to create turbulent flows 28 that rotate in the same directions in the suspension sub - streams in the relating channels 16 . the turbulence generating elements in the present example include nozzles 44 through which the supply of stock suspension into a respective tube channel 16 occurs asymmetrically and at least essentially tangentially to tube wall 46 . supply of the stock suspension through the nozzles occurs asymmetrically , relative to center plane e progressing in longitudinal direction through tube channel 16 . in the present example this is always only on one side of this center plane e . as can be seen in fig3 , feeding into the various tube channels 16 through the nozzles always occurs on the same side of the center plane e , for example the right side in fig3 , resulting in same directional rotation of the various turbulent flows 28 . as can be seen in fig3 and 4 , in addition to stock suspension feed 14 , headbox 12 can additionally be equipped with at least one inlet 48 for dilution water , air , chemicals and / or other substances . as seen in fig4 the supply of dilution water , air , chemicals and / or similar substances can essentially occur in an axial direction of a respective channel . again , headbox nozzle 20 can be provided with or without lamellar plates . a turbulence block 18 can also be provided alternatively or in addition to the tube generator 42 . as illustrated in particular in fig4 , an intermediate chamber 50 can be provided , for example , following tube generator 42 which is equipped with rotation channels 16 . in the available design example the rotational flow is produced by the asymmetric or tangential inflow of suspension . fig5 is a schematic longitudinal sectional view of another design form of a headbox 12 , including tube generator 42 . a turbulence block can again be provided alternatively or in addition . in the present example helix - type spiral or helix 52 are installed in at least a section of channels 16 of tube generator 42 , or in the turbulence block , for the purpose of producing turbulent flows rotating in the same direction . as can be seen in fig5 , headbox 12 also includes stock suspension feed 14 , a headbox nozzle 20 and a stationary , preferably adjustable wall 30 . headbox nozzle 20 can be sectioned by at least one lamellar plate 36 , or can also be configured withouth lamellar plates . helix - type spirals 52 can be configured and installed specifically so that same - directionally rotating turbulent flows again occur . moreover , a respective rotational flow initiated by a relating helix - type spiral 52 can be produced , for example , as described in u . s . pat . no . 5 , 876 , 564 . in the design form illustrated in fig5 an acceleration segment a of the headbox is followed by a section b that shows helix - type spirals 52 . this is followed by a section c , for example constant deceleration or acceleration , further followed by an additional acceleration section d . a deceleration occurs in a subsequent section e . fig6 is a schematic partial illustration of former 10 that is equipped with a movable wall 30 , or a wall in motion , that is formed by an additional dewatering belt 54 and that is located in area opposite forming roll 38 and that covers a certain circumferential length l of forming roll 38 . former 10 also includes dewatering belt 24 that is routed around forming roll 38 and is formed particularly by a wire , and has headbox 12 whose suspension stream 22 is directed into the area between forming roll 38 and breast roll 56 , around which dewatering belt 54 that forms wall 30 is routed prior to the area that covers forming roll 38 , viewed in direction of belt travel 1 . dewatering belt 54 can also specifically be a wire . after forming roll 38 , two dewatering belts 24 , 54 are run over an additional forming element 58 . in an area opposite forming roll 38 movable wall 30 that is formed by dewatering belt 54 is curved , at least partially according to a curvature radius r 1 that is preferably larger than or equal to radius r 2 of forming roll 38 . movable wall 30 can , for example , cover a circumferential length l of the forming roll 38 that is in a range of approximately 100 to approximately 1500 mm and / or corresponds with a circumferential angle a of forming roll 38 of approximately 25 ° to approximately 120 °. as can be seen in fig6 , the additional dewatering belt 54 that forms wall 30 can be routed around breast roll 56 , prior to the area covering forming roll 38 , when viewed in direction of travel 1 . curvature radius r 1 of wall 30 in the area covering forming roll 38 is preferably larger than radius r 3 of the breast roll , or respectively the corresponding curvature radius r 3 of wall 30 in the area of this breast roll 56 . fig7 is a schematic longitudinal sectional view of headbox nozzle 20 that is sectioned by at least one lamellar plate 36 , whereby at least one lamellar plate 36 is equipped with at least one interference body 60 in order to provide a turbulence generating profile . moreover , at least one lamellar plate 36 has a length not exceeding 70 % of the length of the headbox nozzle 20 . at least one lamellar plate 36 and / or at least one nozzle wall 20 ′, 20 ″ can have contours that serve to generate turbulent motion . fig8 is a schematic , perspective partial view of headbox nozzle 20 that is sectioned by at least one lamellar plate 36 , whereby at least one lamellar plate 36 has a swirl - producing contour , in this example a washboard contour . at least one lamellar plate 36 and / or at least one nozzle wall 20 ′, 20 ″ can possess this type of swirl - producing contour , for example in the form of a washboard contour . fig9 is a schematic longitudinal view of headbox 20 , that is sectioned by at least one lamellar plate 36 , where the upper and lower nozzle wall 20 ′ or 20 ″ respectively are contoured so that turbulence generating edges 62 are created in the flow area . in order to achieve an appropriate effect a respective headbox nozzle 20 should be as short as possible , whereby headbox nozzle 20 is preferably shorter than approximately 400 mm . the outlet cross section of channels 16 or pipes is preferably at least essentially round , since a square cross section would dampen the effect . other desired combinations of the various former variations , as well as of the various headbox variations are feasible . while this invention has been described as having a preferred design , the present invention can be further modified within the spirit and scope of this disclosure . this application is therefore intended to cover any variations , uses , or adaptations of the invention using its general principles . further , this application is intended to cover such departures from the present disclosure as come within known or customary practice in the art to which this invention pertains and which fall within the limits of the appended claims .