Patent GB-157328-A (GB)
Title: Apparatus for colouring webs of fibrous material by spraying
IPC: D06B1/02
Filed: 1921-01-10
Abstract: 157,328. Zimmer's Erben, F. April 12, 1919, [Convention date]. Inkless printing by chemical reaction; stencilling; drying- apparatus. - In apparatus for colouring webs by means of a spraying nozzle which is moved to and fro at right-angles to the web, the latter is fed intermittently and is at rest during the spraying operation. As shown, a web, together with a supporting band, is drawn over an intermittently rotated roller 6, Fig. 1, over guide rollers, between steam heated drying plates, and is then rolled up. The nozzle support 16 is reciprocated by a threaded bar 17 rotated in opposite directions by driven pulleys 18, 19 alternately coupled to the bar 17 by a clutch 20 displaced by a rod 24 actuated at the end of each reciprocation of the nozzle by a projection 21 on the support 16 engaging stops 22, 23 on the rod. Incidentally other projections on the support 16 engage stops 26, 27 on a rod 25 so as to operate a rack 28 engaging a pinion 29, Figs. 1 and 4, fixed to a disc 31, connected by a crank-pin, preferably radially adjustable, to a rod 32 pivoted to an arm 33 pivotally mounted on the shaft of the roller 6 and carrying a pawl 35 engaging a ratchet wheel 7 fixed to the shaft, the arrangement being such that each movement of the rack 28 oscillates the crank-pin to a corresponding position on the other side of the top position so that the pawl 35 receives both a forward and a reverse movement, whereby the roller 6 is rotated always in the same direction, a pawl 36 preventing any reverse rotation. The Specification as open to inspection under Sect. 91 (3) (a) comprises also a process for producing designs on webs and a modification of the apparatus. The web is permanently embossed or temporarily embossed during the spraying and a colouring, discharging, or rnordanting medium in liquid or powder form is sprayed on to the web at an acute angle, the raised parts of the design protecting the depressions and producing relief and shadow figures. The surface of the web may be provided with a grounding by dyeing or discharging and stencils may be used. Figs. 7, 8, and 9 (Cancelled) show the modified form of apparatus. Ccnes 38, 39 are fixed to a rod 37, and springs 59 are mounted on the rod 24 between the stops 22, 23 and sliding discs 60, 61. The nozzle 34 is provided with a regulating needle 40, connected to a lever 45 pivoted to a fixed pin 47, an extension 45<1> of the lever abutting against the end of a screw 48 adjustable to vary the nozzle opening, and a spring-pressed rod 49, connected by a link 50 to the lever 45, pressing the needle 40 into its closed position. The nozzle is thus automatically cleaned at the ends of its path by being fully opened, the cones 38, 39, Fig. 7 (Cancelled) engaging and rocking the lever 45 for that purpose. Fig. 9 (Cancelled) shows a device for automatically stopping the machine when the clutch 20 is disengaged from both pulleys. A prismatic thickened part 51 of the rod 24 sliding in a corresponding groove has a central recess adapted to engage the end of a spring-pressed bolt 52. To stop the machine a handle 54 fixed to the bolt is turned so as to allow a pin 55 to enter a slot 56. The rod 24 moves on until the end of the bolt enters the recess the remaining movement of the bar 17 causing one of the springs 59, Fig. 7 (Cancelled) to be compressed so that on starting the machine again the clutch 20 is moved into the position to which it was last proceeding. This subject-matter does not appear in the Specification as accepted.