Patent GB-190013145-A (GB)
Title: Improvements in Compounds and Machines to be employed in what is known as Polychromatic Printing.
Inventor: WHITE WILLIAM GEORGE
Filed: 1900-07-20
Granted: 1901-05-25
Abstract: 13,145. White, W. G., and White, R. A. A. July 20. Printing fabrics; printing in several colours.-Relates to colour compositions and machines for use in polychromatic printing processes in which the well-known solid colour blocks are employed. A composition for mixing with the various colouring-matters for forming the blocks consists of a mixture of 30 parts of stearic acid, 20 parts of pela (vegetable wax), 15 parts of pale boiled linseed oil, 25 parts of clear resin dissolved in spirits of turpentine, and 10 parts of soda as free as possible from water. Thirty parts of this mixture and 20 parts of fuller's earth, French chalk, or other suitable vehicle are well ground together. The different dyes &c., such as the alizarine derivatives, galloflavine, auramine, aniline dyes, &c., are prepared with acetic acid, acetate of chrome, &c., for mixing with the above composition. Suitable preparations for various colours are fully described in the Specification. The colour composition is made up into blocks having the required design, and the blocks are then cut into sheets which are fixed end to end, on a suitable support, to form a long printing-surface. This long sheet or block is then run from its support on to a printing-cylinder, to which it adheres. Fig. 1 shows a machine in which 3 is the polychromatic printing-cylinder, mounted on a shaft 2 in a frame 1. The surface of the composition is turned up or trued by a knife on a slide-rest s. The fabric 4 to be printed passes over tension bars or rollers 6, and over a roller 9 running in a trough 10 containing a solvent such as turpentine. The fabric is pressed on to the roller 9 by rollers 11 adjustable by screws 13 and gearing 14 &c. The fabric then passes round the cylinder 3, a back cloth 5 being passed round behind it. The fabric is pressed on to the cylinder by rollers 15, journalled eccentrically on discs 18 journalled on the frame 1. The discs 18 are fixed to spur-wheels gearing with large spur-wheels 20 loose on the shaft 2, one at each end of the cylinder. The wheels 20 are rotated slowly to move the pressure rollers 15 as the cylinder 3 decreases in diameter. The wheels 20 gear with pinions on a shaft 36 rotated at variable speed by an eccentric 38 removably fixed thereto. On the eccentric 38 is a segmental rack geared to a pinion on a shaft 37 journalled at one end in the strap of the eccentric and at the other in a forked guiding-frame mounted to rise and fall. The shaft 37 is driven by a worm on a shaft 33 journalled at one end in the rising and falling frame, and at the other end in a frame 24 pivoted on the shaft 23. The shaft 33 is driven by worm and spur gearing from the shaft 23, which is driven by a band 22 and speed pulleys from the shaft 2. Pressure may be applied to the rollers 15 by a weighted arm 45, loose on a shaft 46 on which are pinions gearing with pinions on the shaft 36. A pawl 50 on the arm engages a ratchet-wheel on the shaft 46. The Provisional Specification states that the pressure rollers 15 may be mounted in slides moved by screws and gearing to keep the rollers up to the cylinder 3.