a former for a machine for the production of a fibrous web , particularly a paper or cardboard web including a headbox equipped with at least one stock suspension feed , one turbulence block equipped with several channels and / or a tube generator equipped with several channels , and a headbox nozzle whose suspension jet strikes an exposed or open surface of a dewatering belt , specifically a wire . turbulence generating elements are allocated to at least a section of the channels and / or the headbox nozzle , in order to create turbulent flows in the suspension substreams in the channels , or in the headbox nozzle . the side of the suspension stream facing away from the dewatering belt is covered at least partially by a wall . a danger of the suspension stream bursting open is reduced to a minimum . in addition , swirling motions of considerably higher intensity than occur on conventional fourdrinier wire formers are now permissible .