. The miller, millwright and millfurnisher. nd variationsof kinds of rolls possible. Many of these are in active operation with moreor less success ; many more have been tried and abandoned. Single and Three High Rolls.—As regards the number of rollsworking together, the single roll working against a breast is not in very ex-tended use, although for certain purposes it is doing good work, and maybe made to do better, especially for the reduction of middlings to high stands of rolls, in which a central roll works against one aboveit and one below it, these three taking the place of
. The miller, millwright and millfurnisher. nd variationsof kinds of rolls possible. Many of these are in active operation with moreor less success ; many more have been tried and abandoned. Single and Three High Rolls.—As regards the number of rollsworking together, the single roll working against a breast is not in very ex-tended use, although for certain purposes it is doing good work, and maybe made to do better, especially for the reduction of middlings to high stands of rolls, in which a central roll works against one aboveit and one below it, these three taking the place of two pairs, are in suc-cessful operation, performing low milling, in Europe. They are not as yetcommon in America. Fig. 279 shows the action of a single roll against a plain surface, P, some-times used for cracking. There is but little contact, hence cool action ; but ROLLER MLLLING. 387 the capacity is naturally less than by any other method for a given peripheralspeed. The greater the distance between m and n, the greater the friction ;. Fig. 279.—SiNCLE Roll and Plane Breast. the greater the capacity (for a given fineness of grinding), and the less thepressure required.
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectflourmi, bookyear1882
