Pulp-ma-chine′.
（Paper-making.) A machine for reducing half-stuff to a fine pulp. It is similar to the half-stuff engine, consisting of an oblong iron vat a rounded at the ends and divided by a partition b, over which is journaled a cylinder c having grooves into which chisel-edged blades d are inserted in sets of 3, generally to the number of 60; beneath these and set at an angle therewith, other cutters e are fixed in the bottom of the vats; the distance between the two may be adjusted by raising or lowering the roller c.
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| Pulp-machine. |
The part c of the bottom is sloping, and has a depression f for the reception of grit.
The machine is charged with dry half-stuff, to [1825] which water is added, and the cylinder c caused by appropriate gearing to make from 150 to 200 revolutions per minute, causing the stuff to pass between the cutters in the direction indicated by the arrows; a hood g is provided to prevent the pulp from being thrown out of the machine, and one side of this is a sieve h with a removable cover i, through which the foul water expelled from the pulp passes and is discharged through the opening k. See also half-stuff machine.
