Elementary treatise on the finishing of white, dyed, and printed cotton goods . which is produced by the frame sides ormoveable sides being brought nearer to each other;in placing these farther apart we return to AB,to obtain at length the position AB which re-presents the greatest separation of the thread. These before mentioned movements are easily-obtained by the stenters, and we intend takingup the study of each apparatus. The necessarymechanism of tentering and stretching the clothis adjusted to each machine according to require- 1 £ i *2 r Fig & . 30. Bs ment. As a general thesis the vib
Elementary treatise on the finishing of white, dyed, and printed cotton goods . which is produced by the frame sides ormoveable sides being brought nearer to each other;in placing these farther apart we return to AB,to obtain at length the position AB which re-presents the greatest separation of the thread. These before mentioned movements are easily-obtained by the stenters, and we intend takingup the study of each apparatus. The necessarymechanism of tentering and stretching the clothis adjusted to each machine according to require- 1 £ i *2 r Fig & . 30. Bs ment. As a general thesis the vibrating apparatusis only used with fixed stenters, we shall howeverhave an oportunity of studying a continuous stenterto which a vibrating apparatus is applied. Fig. 30, page 141, represents the differentmovements which can be given to the same threadwhen the action of oscillation has its starting pointin the middle of the cloth. Take the point C° — the thread being re-presented by A°C°B, the frame sides fixed to twosorts of connecting rods and fastened to a median. MACHINES EMPLOYED IN FINISHING. 143 rod, the centre C can occupy a series of positionssimilar to those in fig. 30, page 141, but on thisside of and beyond the straight line forming themaximum opening. For instance let us take as star-ting point A0C°B0 and by drawing the centre rodtowards us (we are supposed to be working ona horizontal plane) we shall have the positionA^CB, which represents the maximum that canpractically be given to a piece, and which repre-sents about 1|8 of its width; to go beyond mightspoil the fabric. If we push back the centre rodwe return to A°C0B°, and continuing in the samedirection we have the line ACB, which is themaximum width the straight line; a greaterstretch would risk breaking the thread, and con-tinuing the same movement we get the positionACB symmetrical with A0CB°, then A2C2B2 sym-metrical with ACB. These different motions toand fro when repeated, represent the best syst
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