. Canadian forest industries 1894-1896. Lumbering; Forests and forestry; Forest products; Wood-pulp industry; Wood-using industries. Fig. 1.—Boiling and Steaming the Sawdust. steam boils and works the sawdust and the com- pounds together thoroughly. This is kept up several hours. The temperature is known by the gauges at C. Next, the steaming and boiling process is stopped, the door D opened, and the worked sawdust shovelled out. From this point it goes to the paper pulp mill, where the sawdust is re- duced to a pulpy condition in the ordinary way in which wood chips, etc., are digested for pa
. Canadian forest industries 1894-1896. Lumbering; Forests and forestry; Forest products; Wood-pulp industry; Wood-using industries. Fig. 1.—Boiling and Steaming the Sawdust. steam boils and works the sawdust and the com- pounds together thoroughly. This is kept up several hours. The temperature is known by the gauges at C. Next, the steaming and boiling process is stopped, the door D opened, and the worked sawdust shovelled out. From this point it goes to the paper pulp mill, where the sawdust is re- duced to a pulpy condition in the ordinary way in which wood chips, etc., are digested for paper making. The next work calls for the return of the prepared pulpy mass to the shop, in which it is partly dried out in large square pieces, and these are compressed into compact forms in such machines as are shown in figures 2 and 3. The principle of the specially devised machine presented in fig. 1 is shown without the frame work, the latter being very powerful. The large sawdust pulp block is seen in the centre in process of being compressed between the steel plates A, A, A. These plates are adjusted to suit the con- A A A secured, and the sawdust pulp is greatly reduced in dimensions, and consequently compacted. But further compressing is desired to attain the ends required for many purposes. This second pressing is done on a machine of finer construc- tion, as may be observed in fig. 3, in which the same block of pulp sawdust is shown in the centre in act of being squeezed into small proportions between the upper press plates A, A and the side pushers B, B. This view is a top one and shows what may be seen when looking down upon the machine. Of course, all the bearings of the shafts are very strong, and so is the frame. These parts are not shown in the drawing. The work is as follows : The belt drives the wheel F, and this in turn imparts motion to the series of wheels E, E, E, E by means of the bev- elled gears as presented in the view. These gears marked E are keyed
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectforestsandforestry
