head box
1. A large flow box on a Fourdrinier papermaking
machine. The furnish of dilute stock is pumped
into the head box and from there flows onto the
wire where it is formed into the web of paper. The
head box is equipped with baffles and other
flow-evening devices; it also agitates the stock
so as to prevent flocculation of the fibers. The
head box is designed to spread the flow of furnish
evenly and uniformly the entire width of the wire
between the deckles. The box may be open, in which
case the height of the stock provides the
pressure, or closed, in which case air pressure is
used. 2. A flow-regulating device on a cylinder
papermaking machine which controls the volume of
stock flowing to the screens and mixing boxes
before the vats. (17
, 72 , 80 )
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