Headbox for machine to manufacture e.g. packaging paper web from fibrous material suspension, has partial flow lines arranged adjacent to secondary feed device and arranged non-adjacent to intermediate channel and/or fluid metering units

摘要

The headbox (1) has a primary feed device (4) for supplying a fibrous material suspension (2) and comprising a transverse distribution pipe (5). A nozzle (20) connected to a turbulence-generating unit (17) comprises a nozzle orifice (21). Partial flow lines (23) are arranged adjacent to a secondary feed device (11) and arranged non-adjacent to an intermediate channel (8) and/or fluid metering units (9, 9.1). A distribution pipe perforated plate (6) comprises a set of flow channels (7) that is arranged in lines (Z) and in gaps (S).