Elementary treatise on the finishing of white, dyed, and printed cotton goods . lers(two, three, four or more) and also the amountof contact. The simplest apparatus of the first class isThomai raising machine. It consists of a drum b,furnished with cards (fig. 108, page 270) overwhich the fabric from roll d passes and is woundagain on to c; the axles of c and a are gearedto that they can turn in both directions. Thefabric h, passes over the guide rollers f and gat a tangent to the raising drum. These guiderollers can be adjusted to give more or lesscontact. Raising machines of various systems
Elementary treatise on the finishing of white, dyed, and printed cotton goods . lers(two, three, four or more) and also the amountof contact. The simplest apparatus of the first class isThomai raising machine. It consists of a drum b,furnished with cards (fig. 108, page 270) overwhich the fabric from roll d passes and is woundagain on to c; the axles of c and a are gearedto that they can turn in both directions. Thefabric h, passes over the guide rollers f and gat a tangent to the raising drum. These guiderollers can be adjusted to give more or lesscontact. Raising machines of various systems have beenconstructed. The one represented is the simplestand best for finishers. However for white fabricsthe Cross-over raising machines are often simplest consists of a frame in the shape of 270 FINISHING IN GENERAL. a right-angled triangle; the hypoteneuse carriesthe raising rollers connected with each other anddriven by the same motion ; the first and fourthwork in the direction of the length of the piece(warp) the second placed at an angle of 45° raises a. Fig. 108. Circular raising machine. towards the left, the third at 45° to the right,acts perpendicularly to the second. The under cathetus acts as a general supportfor the machine and the vertical side, supportsthe batching roller. The cloth beam is in frontof the machine. MACHINES EMPLOYED IN FINISHING. 271 Cross-over raising machines generally consistsof a frame with batching apparatus, gearing etc. The cards are fixed to thin boards eachprovided with a link motion and connecting rod,driven by a set of eccentrics or cranks from thegearing of the machine (fig. 109, page 265). Our drawing has four cards which raise alter-nately from right to left and from left to right. Besides raising machines brushing machinesare used for removing the fluff and dust causedby the cards. They generally consist of a batchingapparatus or canroy arranged to give a longinterval between the unrolling and rolling up ofthe fabri
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