92 (#142) ############################################# WOOLLEN AND WORSTED SPINNING takes the fibres lying below the points of the teeth of the swift. The value of this idea may be thought out as follows: 1. Under any circumstances as great a weight of wool should be passed through the carder as the wires on the cylinders can well control and truly card. The limit should not be in the condensing 2. The material to be condensed - (a) as is usually the case, may be divided up into a large number of fine or a smaller number of coarse filaments according to the divisions (i.e. tapes) across the machine ; or (b) may be continuously delivered as two films, and each of these films divided up into fine or coarse filaments according to the divisions (i.e. tapes) across the machine. Thus the double-film tape condenser in comparison with the ordinary tape condenser may allow- I, the same number of filaments of the same count number to be taken off with tapes double the normal width; or 2, say, double the number of films, of double the count number, to be taken off with tapes the normal width. Carding engineers generally agree that given the maximum weight of film coming through the card, the normal single film condenser with tapes of the necessary pitch will do all that is required and yield a uniform result-which, of course, a card cannot yield from two condensing film layers. There would seem to be room, however, for a convenient method of varying the width or pitch of the tapes. With a given tape condenser the 92
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