The machine illustrated in Fig. 15 is of the latter type, and such machines are so-called because the various pairs of rollers are so disposed around the cylinder that they occupy almost a complete circle, and the fibre under treatment must move from pair to pair to undergo the combing and splitting action before coming into contact with the doffer.  There are five pairs of rollers in the machine in Fig. 15, and all the rollers are securely boxed in, and the wheels fenced.  The arrangement of the wheels on the gear side is very similar to that shown in connection with the breaker card in Fig. 14, and therefore requires no further mention.  Outside the boxing comes the covers, shown clearly at the back of the machine in Fig. 15, and adapted to be easily and quickly opened when it is desired to examine the rollers and other parts.

The slivers, after having passed amongst the pins of the various rollers, and been subjected to the required degree of draft, are ultimately doffed as a thin film of fibres from the pins of the cylinder and pass between the drawing rollers to the conductor.  The conductor of a finisher card is made in two widths, so that half the width of the film enters one section and the other half enters the other section.  These two parallel sheets, split from one common sheet, traverse the two conductors and are ultimately delivered as two slivers about 6 inches above the point or plane in which the 10 or 12 slivers entered, and on to what is termed a “sliver plate.”  The two slivers are then guided by horns projecting from the upper surface of the sliver plate, made to travel at right angles to the direction of delivery from the mouths of the conductors, and then united to pass as a single sliver between a pair of delivery rollers on the left of the feed and delivery side and finally into a sliver can.

In special types of finishing cards, an extra piece of mechanism—­termed a draw-head—­is employed.  The machine illustrated in Fig. 15 is provided with this extra mechanism which is supported by the small supplementary frame on the extreme right.  This special mechanism is termed a “Patent Push Bar Drawing Head,” and the function which it performs will be described shortly; in the meantime it is sufficient to say that it is used only when the slivers from the finisher card require extra or special treatment.  A very desirable condition in connection with the combination of a finisher card and a draw-head is that the two distinct parts should work in unison.  In the machine under consideration, the feed and delivery rollers of the card stop simultaneously with the stoppage of the draw-head mechanism.

One of the chief aims in spinning is that of producing a uniform thread; uniform not only in section, but in all other respects.  A so-called level thread refers, in general, to a uniform diameter, but there are other equally, if not more, important phases connected with the full sense of the word uniform.