60 (#106) ############################################# WOOLLEN AND WORSTED SPINNING comb (Fig. 20) does not appear to be nearly so efficient as that by the stripper (Fig. 21). In dealing with a delicate film of wool of this nature, the influence and effect of air currents must not be overlooked, and on this account the “stripper" method is much less objectionable than the reciprocating doffing comb. The dividing of the film of material is effected on two distinct methods :- (1) By the " presence" and "absence” card wire “ system, known as the Ring-Doffer system ; FANCY DOFTER O CYLINDER. DOFFER. Fig. 19a.-Double Doffer Tandem Rubber Condenser (2) By means of tapes or bands, two horizontal layers of which unite to receive the full-width film of material between themselves but separ- ate virtually into i-in., or 4-in. or -in. sections as they carry the film forward, thus dividing the full-width film into a number of fila- ments. * The simplest form of ring-doffer condenser is shown in Figs. 18 and 18a. Most carding engineers prefer this system to any other, but owing to the fact that 60
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