. The principles and processes of cotton yarn manufacture. nder; the number used is about 110,of which 48 are working at a time, while the remainder are passing overthe top of the machine from front to back. Between the last working flat and the organ E in Fig. 33, called a doffer, is fitted a plate known as the front knife plate. Its object is toprevent drafts of air from blowing across the cylinder. It acts therefore 58 COTTON YARN MANUFACTURE as a tight cover extending from one side of the machine to the plate is adjustable and is set very close to the cylinder surface. Thepassag
. The principles and processes of cotton yarn manufacture. nder; the number used is about 110,of which 48 are working at a time, while the remainder are passing overthe top of the machine from front to back. Between the last working flat and the organ E in Fig. 33, called a doffer, is fitted a plate known as the front knife plate. Its object is toprevent drafts of air from blowing across the cylinder. It acts therefore 58 COTTON YARN MANUFACTURE as a tight cover extending from one side of the machine to the plate is adjustable and is set very close to the cylinder surface. Thepassage of any drafts of air across the cylinder surface would tend todisturb the straightened fibres and make unevenness. The plate in ques-tion succeeds very well in preventing them. The cotton carried around by the cylinder is laid upon what is calledthe doffer. The doffer is a cylindrical shell about 24 or 27 inches indiameter, and is constructed similarly to the cylinder. Its surface iscovered with teeth like those on the cylinder, but somewhat finer. The. Fig. 49. inclination of the teeth is exactly like that of the ones on the the point where the two organs are nearly in contact, however, sincethe points are not corresponding points on the two cylinders, the teethare opposed to each other. The doffer revolves ver}^ slowly in theopposite direction to that of the cylinder, with a surface speed of about60 feet a minute. This speed and the relation between the doffers teethand those on the cylinder, allow the swiftly revolving cylinder to depositits cotton on the doffer. There is therefore cotton on the cylinder evenwhile it passes from the point of nearness to the doffer around to the CARDING 59 licker-in. Underneath the cylinder between these two points is placed atin screen or under-casing, similar to the one under the Hcker-in. Thiswas incidentally referred to before; it can be clearly seen at C^ in , and at U in Fig. 33. It has the same function as the licke
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Keywords: ., bookauthorwinchest, bookcentury1900, bookdecade1900, bookyear1902
