. The principles and processes of cotton yarn manufacture. 72 Tiiiiiimiihi»ir^iii|iiiiHimiimnii\26^aoo43. Fig. 74- following examples are practically the only ones needed on a sliver gears used are those in Fig. 74. The large lap rolls are 9 inches indiameter, and the back drawing roll is i inch in diameter. i08 cotton yarn manufacture; Draft. The total draft is figured from the first small drawing roll to the laprolls, :— 64 X 24 X 26 X 20 X 72 X 12x9 1. Draft = = ?.22 20 X 41 X 50 X 20 X 29 X 72 X I draft gear 64 X 24 X 26 X 20 X 72 X 12 X 9 2. Draft constant ^=
. The principles and processes of cotton yarn manufacture. 72 Tiiiiiimiihi»ir^iii|iiiiHimiimnii\26^aoo43. Fig. 74- following examples are practically the only ones needed on a sliver gears used are those in Fig. 74. The large lap rolls are 9 inches indiameter, and the back drawing roll is i inch in diameter. i08 cotton yarn manufacture; Draft. The total draft is figured from the first small drawing roll to the laprolls, :— 64 X 24 X 26 X 20 X 72 X 12x9 1. Draft = = ?.22 20 X 41 X 50 X 20 X 29 X 72 X I draft gear 64 X 24 X 26 X 20 X 72 X 12 X 9 2. Draft constant ^= = 41 X 50 X 20 X 29 X 72 X I 3. Production equals surface speed of lap rolls — 10 per cent.,allowance for stopping, oiling, cleaning, etc. Theoretical production in pounds for ten hours of a lap weighing 200grains per yard, when the calender rolls speed is 100 revolutions = 100 X 5 X X 60 X 10 X 200 7 = 748 pounds 36 X 7000 ^ Actual production = 748 pounds — 10 per cent. := 748 — = RIBBON LAP MACHINE The ribbon lap machine is not always used, but its use certainly does
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