552

DYEING AND CALICO PRINTING.

means of set-screws, bring them into more or less close contact with the otherrollers, 8. Thus the amount of colour taken up can be varied at will. Therevolution of the blanket, back-cloth, and pieces is regulated by the followingcontrivance :—At the angles of the three tables B are rollers, I, their surfacesbeing fitted with needle-points. These prevent the cloth from slipping as itpasses round, and cause the pieces to be printed to move on regularly. Thismovement is effedted by the cog-wheels, 21 (Fig. 25), keyed on the ends of theaxles of these rollers. G is a roller which stretches the endless web, restingwith the ends of its axles on two cushions forming the ends of the screws, 12.By these the roller, if needful, can be pushed further out, so as to stretch thecloth to the degree required. H is another stretching-roller, which supportsthe blanket and back-cloth, k is another roller, which serves to stretch the

Fig. 24.

blanket, back-cloth, and pieces. T is the blanket, passing round the semi-circumference of the roller g, over H and behind k, round 1, and over thesurface of the tables B. L is a cylinder from which the back-cloth is unwound,having been first stretched by H, and smoothed by the scrimping-bars, 13. Itthen joins the blanket at the roller K. M is a roller from which the piece tobe printed is uncoiled by the revolution of the machine, passing over thescrimping-bars, 14, and joining the blanket and back-cloth at the roller K. Itaccompanies the two latter till it arrives at G, when it is led off towards N,and is dried on the hanging-rollers. The whole machine is moved either byhand, with a winch, or by steam-power, when a driving band is passed overthe pulley 18, arranged with different diameters, so as to give different degreesof speed. It carries catches, locking into a sliding catch-box on the shaft