. Canadian forest industries 1897-1899. Lumbering; Forests and forestry; Forest products; Wood-pulp industry; Wood-using industries. May, 1899 THE GJL1ZJLJDJL LUMBERMAN '3 is provided for extracting- as much of the water from the felt and pulp as possible before it passes between the press rolls. The box extends the whole width of the felt, and io tightly closed up, except the top, where it is per- forated with small holes. A pipe connects this box with the draft tube of the water wheels, or to a power-driven suction pump. As the felt passes over the box the water is sucked down into it, leavi
. Canadian forest industries 1897-1899. Lumbering; Forests and forestry; Forest products; Wood-pulp industry; Wood-using industries. May, 1899 THE GJL1ZJLJDJL LUMBERMAN '3 is provided for extracting- as much of the water from the felt and pulp as possible before it passes between the press rolls. The box extends the whole width of the felt, and io tightly closed up, except the top, where it is per- forated with small holes. A pipe connects this box with the draft tube of the water wheels, or to a power-driven suction pump. As the felt passes over the box the water is sucked down into it, leaving the felt much drier. In large mills where there are many wet machines running, it is by far the best method to connect the suc- tion or draft boxes with a power- driven suction pump, as any consider- able amount of air let into the draft tubes of the water wheels means a loss of head, which is very expensive when it means a decreased output. The vat is made of 3-inch pine bolted together, and provided with sprays as usual. The cylinder mould, which revolves in the vat, consists of a number of brass spiders mounted on a shaft, and covered with brass wire cloth. It is driven by contact with the couch roll. The felt, in its path, passes the stretch roll in front of the machine, goes down under the two rolls near the floor, up past the beater and cleaning sprays, through the squeeze rolls and back under the couch roll. From here it passes over the guide roll, past the suction box and through the large press rolls, and so back to the stretch roll in front. Fig. 12 shows the interior of the Chicoutimi Pulp Company's wet machine room. This is the usual arrangement of wet machines in either large or small mills. The machines are driven from a main shaft supported by the roof trusses. In the right foreground is shown the hydraulic press, which is used to force some of the water from the pulp. The screens and pulp trough are placed back of the wet machines. There are eight wet machine
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectforestsandforestry
