Knight's American mechanical dictionary : a description of tools, instruments, machines, processes and engineering, history of inventions, general technological vocabulary ; and digest of mechanical appliances in science and the arts . 3=^ Pulp-Digester. soda; steam is then turned on until the liquid boil.^, risingthrough the pipes//, and is deflected by the under surface ofthe bonnet; the paper scraps are then gradually thrown in anddistributed as uniformly as possible. After boiling, the massis hnist«d out of the tub by chains which are hooked to a frameconnected with the false bottom and at
Knight's American mechanical dictionary : a description of tools, instruments, machines, processes and engineering, history of inventions, general technological vocabulary ; and digest of mechanical appliances in science and the arts . 3=^ Pulp-Digester. soda; steam is then turned on until the liquid boil.^, risingthrough the pipes//, and is deflected by the under surface ofthe bonnet; the paper scraps are then gradually thrown in anddistributed as uniformly as possible. After boiling, the massis hnist«d out of the tub by chains which are hooked to a frameconnected with the false bottom and attached to the liftingchain of the crane. The tubs have covers of wood or metal to prevent escape of heat and steam. The liquid is drawn off bythe pipes below. Fig. 40n a view of the Palser and Uowland rotary pulp-di-gester. It has a rotary boiler with a hollow trunnion throughwhich passes apipe having ao internal partition, so that the Fig. 4011. Falser ami Huwlaivl Fitly-Digt^ter. steam from the upper portion of the boiler may find exit throughone compartment of the pipe, and the Uquid contents of theboiler may find an exit through the other compartment. A perforated diaphragm near the end of the boiler protectsthe steam and alkaline liquid iii>es. and serves also to strain theliquid from the stock under treatment. The boilers are ar-ranged in }>airs, so that the sU-am arising from the boiling ofthe alkaline and other contents of one lioiler is injected intothe other. The rotary-boilers are heated by a furnace below,and the chimneys pass through the cylindrical-bottomed vatsabove. Fig. 4012 is an apparatus for reducing .<;traw to half-stufffor the manufacture of paper. The straw, after being cut up Fig. 4012.
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