. The manufacture of pulp and paper : a textbook of modern pulp and paper mill practice. lats 2, set at an angle, as shown in the cut. Over these isstretched a layer of heavy copper-wire cloth, about |-inch mesh,which forms the support for the outer layer of fine mesh (30 to50) wire cloth. A better support consists in winding around theslats a continuous copper wire, of about 14 gauge and about \inch center to center, upon which the usual 15-mesh and 30-mesh wire cloth covers are secured. The stock to be thickened enters by the butterfly valve valve is controlled by a float 4, which is
. The manufacture of pulp and paper : a textbook of modern pulp and paper mill practice. lats 2, set at an angle, as shown in the cut. Over these isstretched a layer of heavy copper-wire cloth, about |-inch mesh,which forms the support for the outer layer of fine mesh (30 to50) wire cloth. A better support consists in winding around theslats a continuous copper wire, of about 14 gauge and about \inch center to center, upon which the usual 15-mesh and 30-mesh wire cloth covers are secured. The stock to be thickened enters by the butterfly valve valve is controlled by a float 4, which is set so as to keep thestock in the vat at a certain level. The cylinder revolves in thevat 5 in the direction indicated by the arrow, and the ends aresealed so the stock cannot run into the cylinder by way of theends, which are connected with the white-water box 9. Thewater in the stock flows through the fine-mesh wire on the surfaceof the cylinder to the inside of the cylinder, and then flows out atthe ends to the white-water box; this leaves the fiber on the 56 TREATMENT OF PULP §7. §7 TREATMENT OF PULP AFTER SCREENING 57 surface of the cylinder, and it is carried along on the cylinder tothe point where the shower 6 strikes it. The shower acts as adoctor, and it washes the thickened stock into thickened-pulpchamber 7. The baffle 12 divides the vat proper from thethickened-pulp chamber. The agitator 8 insures a thoroughmixing of the stock, and it breaks up any fiber bunches or pulp leaves by means of the discharge pipe 10. This machine is designed for continuous operation. The whitewater should be inspected to determine the amount of fiber in it,and an excess of good fiber indicates broken cylinder machine is also used as a slush machine for chemical pulps,water filter, and save-all. REGULATION OF CONSISTENCY 52. Necessity for Regulating Consistency.—The success ofpaper manufacturing processes depends very largely upon themaintenance of uniform cond
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Keywords: ., bookcentury1900, bookdecade1920, booksubjectpaperma, bookyear1921
