GILLING
1. Cans containing Comb Ends or Sliver.
2. Balling Head.
3. Stock from Balling Head No. 2.
4. Screws for applying pressure to Back Rollers.
5. Screws for applying pressure to Front Rollers.
6. Faller Screws situated between No. 4 and No. 5.
7. Guard for covering gears which drive Back Rollers.
8. Guard covering gears which drive Balling Head.
9. Balling Head.
The combing of wool may be dispensed with in some cases, although such a yarn is not in common use. When combing is dispensed with, the gills, in connection
with the draught of the rollers, make the fibers straight, and produce a worsted yarn, although such a yarn has a tendency to be uneven and knotty.
Before the wool can be spun it must be made into roving of a suitable thickness. This is done by passing it, after being combed, through a series of operations termed drawing, whose functions are to produce a gradual reduction in thickness at each stage. Although the number of machines varies according to the kind of wool to be treated, still the same principle applies to all.
Spinning. The process of spinning is the last in the formation of yarn or thread, the subsequent operations having for their object the strengthening of the yarn by combining two or more strands and afterward arranging them for weaving or for the purpose for which the yarn is required. It is also the last time that the fibers are mechanically drawn over each other or drafted, and this is invariably done from a single roving. The humidity and temperature of the spinning room must be adjusted to conditions. Each spinner is provided with a wet and dry thermometer so that the best temperature can be ascertained. The most suitable heat and humidity can only be obtained by comparison and observation. A dry and warm atmosphere causes the wool to become charged with electricity and then the fibers repel each other.
WORSTED SPINNING. “BRADFORD SYSTEM”