The Jute Industry: From Seed to Finished Cloth

fibres are continued. And, in addition to these important functions, two other equally important operations are conducted simultaneously, viz., that of imparting to th

echanism, but each machine is provided for the manipulation of two rows of bobbins, and, of course, with two rows of spindles and flyers. These two rows of spind

nd thus to drive the bobbin. The discs or bobbin supports are situated in holes in the "lifter rail" or "builder rail" or simply the "builder"; the vertical

8 ROVI

Messrs. Douglas F

through an eye at the extreme end of either of the flyer arms, and finally on to the bobbin. Each bobbin has its own sliver can (occasionally two), and the sliver passes from this can between the sides of the sliver guide, between the retaining rollers, then amongst the gill pins of the fa

surface speed of the periphery of the delivery rollers, this speed approximates to about 20 yards per m

ed = delive

tly of the spindle and flyer, is constant for any one series of rove coils on the bobbin. The speed of the bobbin differs, however, for ea

wever, are raised gradually by the builder during the formation of each layer from the top of the bobbin to the bottom, and lowered gradually by the builder during the for

9 ROVI

S ROVING F

sary to impart an intermittent and variable speed to the bobbin. The mechanism by means of which this desirable and necessary speed is given to the bobbin constitutes one of the most elegant groups of mechanical parts which obtains in textile machinery. Some idea of the intricacy of the mechanism, as

oughout, and must coincide with the delivery of yarn from the rollers, so that the attenuated but slightly twisted sliver can be wound on to the bobbin without strain or stretch. The varying motion is regulated and obtained by a drive, ei

est the observer. The gear wheels are, as shown, efficiently guarded, and provision is made to start or stop the machine from any position on both sides. The machine is adapted for building 10 in

and 5 in. in diameter, and hence the traverse of the builder would be 10 in. The 10 in. x 5 in. bobbin is the standard size for the ordinary run of yarns, but 9 in. x 4-1/2 in. bobbins are used for the rove

and according to the count of the required yarn; the parts involved in these changes are those which affect the draft gearing, the t