In this operation there is no doubling of the slivers, but each sliver passes separately through the machine, from the can to the spindle, is drawn out to about eight times its length, and receives a small amount of twist to strengthen it, in order that it may be successfully wound upon the roving bobbin by the flyer.
She kept her head down, pretending she had a sliver in her finger.
After passing the last pair of workers and strippers the fibre is carried forward towards the doffing roller, the pins of which are back-set, and the fibre is removed from the cylinder by the doffer, from which it passes between the drawing and pressing rollers into the conductor, and finally between the delivery and pressing rollers into the sliver can.
Let R = the revolutions per second of the flyer; r = the revolutions per second of the bobbin; d = the diameter of bobbin shaft plus the material; L = the length of sliver delivered per second; then (R - r) d.
All these doublings of the sliver and re-drawing are for the purpose of getting each fibre to lie parallel and to make the sliver of an equal weight over every yard of its length.
A sliver of light under Cade's door suggested he was already awake.
This sliver is taken through a series of four other drawing machines called " four head drawing box."
This lap is sometimes re-spread to make it more even, and at other times taken to a drawing machine which delivers in a sliver form.
This sliver is put up behind the second drawing; eight or more ends together run through the second head again into one sliver; and so on through the third and fourth heads of drawing.
From the last head of drawing the sliver is taken to a machine known as a gill rover.
After the fibre has been thoroughly carded by the above machines, the cans containing the sliver from the finisher card are taken to the first drawing frame.
It is essential that the bobbin should have such a motion, because the delivery of the sliver and the speed of the flyer are constant for a given size of rove, whereas the layers of rove on the bobbin increase in length as the bobbin fills.
This is a drawing machine fitted with fallers through which the sliver is drawn, but the end from the front roller is wound on to a bobbin.
The sliver from the can of the breaker card may be wound into balls, or it may be taken direct to the finisher card.
A very common method is to let four slivers run into one sliver at the first drawing, then two slivers from the first drawing are run into one sliver at the second drawing frame.
It is easy to see that a certain amount of draft, or drawing out of the sliver, is necessary, otherwise the various doublings would cause the sliver to emerge thicker and thicker from each machine.
She didn't know if she'd hurt him enough to drive him away forever or if there was a sliver of him that still wanted her.
He grabbed the hen by the wing and headed for a sliver of light shining through the coop door.
The resulting sliver is used by silk spinners who make a speciality of spinning short fibres, and the exhaust noils are bought by those who spin them up into " noil yarns " on the same principle as wool.
Eight or more slivers are put behind the first drawing head, conveyed through the fallers and made into one sliver in front of the machine.