Elementary treatise on the finishing of white, dyed, and printed cotton goods . dby straining. The simplest process is to employ a metal,hair or silk sieve, fine or coarse, according to themass to be strained. The paste is strained bymeans of a brush, which causes it to pass throughthe meshes of the sieve. This system was per-fected in 1850 by causing the brush to workmechanically on the fixed sieve. Mr. Dolfus has constructed (1882) a veryingenious apparatus, in which the brush works inthe same way as the hand. It does not describea circle, but a series of curves, representing theaction of si
Elementary treatise on the finishing of white, dyed, and printed cotton goods . dby straining. The simplest process is to employ a metal,hair or silk sieve, fine or coarse, according to themass to be strained. The paste is strained bymeans of a brush, which causes it to pass throughthe meshes of the sieve. This system was per-fected in 1850 by causing the brush to workmechanically on the fixed sieve. Mr. Dolfus has constructed (1882) a veryingenious apparatus, in which the brush works inthe same way as the hand. It does not describea circle, but a series of curves, representing theaction of sifting by hand. The straining is facilitatedby a circular motion given to the sieve in thedirection contrary to that of the brush. Another method much in use, but which ismore expensive than the preceding machine, inas-much as it requires two workmen and gives smal-ler results, consists in squeezing the size throughlinen or cotton bags. These bags, which are 78 FINISHING IN GENERAL. funnel-shaped, are filled with the sizing workmen then take two round sticks at top. Fig. 6. Colour straynings machine. of sack and pressing them with great force againsteach other, push them down the bag length-ways. The size is thus squeezed through, but MACHINES EMPLOYED IN FINISHING. 79 the cloth is often torn, and as already men-tioned this process is very expensive and apparatus, made on the same principle, is muchused in England. This machine consists of a frame, formed oftwo uprights and a transverse piece, connectingthem at the top. Inside and midway between thesetwo uprights two cylinders are fitted, varyingfrom ten to twenty centimetres in diameter andwhich can be moved nearer to or further fromeach other. In the middle of the transverse piecea screw is fixed with a hand-pulley attached toraise or lower it; and at the end of this screwa pointed bag is fastened, containing the size tobe strained. When the screw is at the lowestpoint of its course the two rollers are broug
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