Elementary treatise on the finishing of white, dyed, and printed cotton goods . draulic presses by the ram from below. Thepumps have generally two pistons; the largergives a rapid motion at the beginning and thesmaller a slower but more powerful and finalimpulsion. Fig. 123, page 286 A, represents a similarpress complete and as at work the pieces areseparated by plates, which may be of different 286 A. FOLDOUT NOT DIGITIZED MACHINES EMPLOYED IN FINISHING. 287 substances. Zinc plates cost less and take up lessroom but they soon get bent and out of shape,wood plates are specially constructed and
Elementary treatise on the finishing of white, dyed, and printed cotton goods . draulic presses by the ram from below. Thepumps have generally two pistons; the largergives a rapid motion at the beginning and thesmaller a slower but more powerful and finalimpulsion. Fig. 123, page 286 A, represents a similarpress complete and as at work the pieces areseparated by plates, which may be of different 286 A. FOLDOUT NOT DIGITIZED MACHINES EMPLOYED IN FINISHING. 287 substances. Zinc plates cost less and take up lessroom but they soon get bent and out of shape,wood plates are specially constructed and the woodshould be dry and well seasoned. Each plate ismade of two pieces of wood, glued together withcasein glue; care must be taken to so place thepieces of wood that the grain is crossed to pre-vent warping. The same press can be worked by hand orpower. Fig. 124, page 288, shows a press ofthis kind; all hydraulic presses should be providedwith a manometer. In large factories the double press is used(fig. 126, page 290 A). Two presses are placed side by side, whilstone is being filled, the other is emptied; in thiscase it is preferable to work the pumps by oven for heating iron plates is shown; theseplates are more particularly used for the specialjnishing of woollen and half-woollen goods (cottonwarps) but they are seldom used for cotton goods. Instead of employing loose plates, not
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Keywords: ., bookcentury1800, bookdecade1880, bookidelementarytr, bookyear1889
