Profile control weir for cylinder paper machines

A profile control weir for feeding dilute pulp suspension to a pond having a cylinder rotating therein which deposits pulp fibers onto a felt, the weir comprising:

• a head box having an inlet for pulp suspension disposed in a lower portion thereof;
• optionally, a making board disposed along an upper front edge of the head box over which pulp suspension flows into the pond;
• at least three profile control boards disposed in mutual parallel, adjacent relationship and parallel to the upper front edge of the head box, each said profile control board including an upper edge, each said upper edge comprising at least one raised section having a flat top section, at least one flat lower section, and a connecting side section connecting the at least one raised section and the at least one lower section, the profile control boards including:
• a first board comprising two pivoting portions, each of said portions including a raised section at one end thereof and a lower section at an opposite end thereof, the raised sections being outer sections and the lower sections being inner, adjacent sections including pivot means;
• a second board comprising two pivotably joined portions, each of said portions having a central raised section and a lower section at ends thereof, inner, lower sections of each of said portions being joined by pivot means;
• and
• a unitary third board having a raised center section and lower end sections adjoining said raised center section.