Appletons' cyclopaedia of applied mechanics: a dictionary of mechanical engineering and the mechanical arts . uides, with grooves in them to direct the iron fromthe rolls. In the smaller sizes of rolls, or finishing-rolls, guides instead of rests are placed in front of the rolls, which arc then calledguide-rolls. One of the most important im-provements in rolling-mill ma-chinery has been the introduc-tion of the three-high mill, inwhich three rolls are placed oneabove the other. In this ar-rangement the middle roll turnsin a contrary direction to theother two. The loss of time,and in heavy rol
Appletons' cyclopaedia of applied mechanics: a dictionary of mechanical engineering and the mechanical arts . uides, with grooves in them to direct the iron fromthe rolls. In the smaller sizes of rolls, or finishing-rolls, guides instead of rests are placed in front of the rolls, which arc then calledguide-rolls. One of the most important im-provements in rolling-mill ma-chinery has been the introduc-tion of the three-high mill, inwhich three rolls are placed oneabove the other. In this ar-rangement the middle roll turnsin a contrary direction to theother two. The loss of time,and in heavy rolling the wasteH k J of labor, in returning the bar tj Jj over the top roll by the common system of rolling in the two-highmill, is completely avoided in thethree-high mill, which reduces inboth directions. The three-highmill has come into most exten-sive use in the United rolling plate, the three-high mill invented by Mr. Bernard Lauth of Pittsburgh, shown in Fig. 2467, is largely used. In thisthe middle roll is much smaller than the upper ami lower rolls. The smaller a roll for rolling plate,.
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Keywords: ., bookauthorbenjaminpark18491922, bookcentury1800, bookdecade1880
