Revista Mexicana de Astronomia y Astrofisica
1992
The head box has a plurality of distribution pipes for delivering pulp with each distribution pipe communicating via a plurality of feed pipes with a row of flow ducts in a block having a plurality of rows of flow ducts. The feed pipes have equal flow resistance and each has a pin-shaped part at the inlet end which acts to anchor the feed pipe in place. Each pin-shaped part also carries a cam which projects into a distribution pipe to keep the inlet to the respective feed pipe free of fibers.
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