Pulp and paper magazine of Canada . beaten short with very great difficulty. The timeof beating was considerably longer than when the stuffwas beaten without size. A saving in power was notto be thought of, in fact the contrary was the case, thepower consumption being somewhat higher than whenbeating took place without the addition of size. It nowstruck me to attempt to separate the short beating of thestuff from the greasy beating, , first to shorten the stuffin the engine for a certain length of time, and after gettingthe required shortness of fibre to raise the roll and add sizeand sulp
Pulp and paper magazine of Canada . beaten short with very great difficulty. The timeof beating was considerably longer than when the stuffwas beaten without size. A saving in power was notto be thought of, in fact the contrary was the case, thepower consumption being somewhat higher than whenbeating took place without the addition of size. It nowstruck me to attempt to separate the short beating of thestuff from the greasy beating, , first to shorten the stuffin the engine for a certain length of time, and after gettingthe required shortness of fibre to raise the roll and add sizeand sulphate of alumina, and to convert the stuff into thedesired greasy state by gentle beating (bruising). I knowvery well that a number of works commenced long agoto add the size shortly before emptying, but in the processnow being described violent beating was employed at thecommencement and in the latter part the beating wasalmost entirely suspended, as also shown in the diagramslib and 7b, whilst it has been a general custom hitherto. •» Beating Half and Whole Stuffs—II. ? ? DYNAMOMETER DIAGRAM By ARNOLD REHN Supplement to Pulp & Paper Magazine, October 15th, 1913, October 15, L913 IMLI AND IAIKK 683 wind up with violent beating. Furthermore a numberof works have been induced, by the introduction of mixingengines, to add the size in the latter without recognisingthe fact that this procedure increases the power requirementsfor the beating process. We have seen in the examina-tions already carried out, that violent beating requirescomparatively the smallest power, and this fact ought tobe utilised here. The charge was the same as in diagram6a, and the shortening was so far carried out by violentbeating that only a very slight further shortening was nec-essary, which could be obtained during the bruising. Thispart of the beating process took 150 minutes in the caseof 4b, and 210 minutes in the case of 5a. The furthertreatment in the beating engine exclusively served fo
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