Chambers's encyclopaedia; a dictionary of universal knowledge . s which maybe here brietly outlined. The object of all operations preliminary to theactual s])inning is (1) to free the libres from allextraneous matter ; (2) to lay them side by side inlevel parallel order ; (3) to pull them out in a con-tinuous strand or sliver of uniform thickness ; and(4) to attenuate this .sliver till the quantity re-quired to form the yarn is reached. The operationsnecessary for these purposes, combiiieil with a pro-perly regulated amount of twist, constitute theconditions necessary to produce sound, level,
Chambers's encyclopaedia; a dictionary of universal knowledge . s which maybe here brietly outlined. The object of all operations preliminary to theactual s])inning is (1) to free the libres from allextraneous matter ; (2) to lay them side by side inlevel parallel order ; (3) to pull them out in a con-tinuous strand or sliver of uniform thickness ; and(4) to attenuate this .sliver till the quantity re-quired to form the yarn is reached. The operationsnecessary for these purposes, combiiieil with a pro-perly regulated amount of twist, constitute theconditions necessary to produce sound, level, anduniform yarn. Taking the case of cotton, the opening andpartial cleaning of the matted libres are secured bypassing the material through two machines calledrespectively the opener and the scutcher. In thesemachines are cylindeis revolving at a high rate ofspeed, with their surfaces studded with stout teethwhich seize separate flocks of the libre and carryingit round form a broad uniform teased mass whichis called a lap. In the tiist of these machines it is. Fig. 5,—.Sections of Cardiiig-engine. also submitted to a strong current of air whichblows dust and dirt out or the cotton. From thescutcher a well opened and spread lap of the libreis delivered to the carding-engine (lig. 5), in whicha series of cylinders of various sizes, and rotatingat dillerent , further <ipen and thefibre. The cylinders are covered with teeth offine wire (fig. 6) bent at about half their length, a h Mm Fig. 6. a, card wire; 6, card setting. of which there be from six to seven millionsin a single machine. According to the directionin which the cylimlers rotate, and the rate of theirrevolution, the wire points may meet each olhir,or the points and Mat sides of the wires may meetand ; ami in this way certain cylinders liftthe libres from their neigliliours ami it on toothers, so that the fibre is gradually teif^ed,brushed, and spread out in a uniform t
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Keywords: ., bookcentury1900, bookdecade1900, bookpublisherlondo, bookyear1901
