Patent GB-189774-A (GB)
Title: Improved method for treating cinematographic films and apparatus therefor
IPC: G03D15/00
Filed: 1922-11-21
Abstract: 189,774. PathÚ Cinema, Anciens Etablissements PathÚ FrÞres, (Assignees of Salins, G. A.). Nov. 29, 1921, [Convention date]. Continuous apparatus for toning and tinting.-A method of obtaining different tones and tints in different parts of a kinematograph film while the film is travelling uninterruptedly through a machine consists in arranging two receptacles containing different treating fluids one behind the other, the film being withdrawn from the first and caused to dip into the second by holding stationary the point of separation of the two parts of the film to be differently treated just before it enters the fluid in use, so that the winding up of the film lifts it out of the first receptacle while the feeding of the film causes it to dip into the second receptacle after which the first receptacle is removed and the second moved into its place. The operation may be carried out by hand. A machine for carrying out the process automatically comprises three treating receptacles A, B, C, Fig. 1, arranged one behind the other and standing on rollers 30. The film to be dyed &c. passes over a smooth roller 103, over a roller 104 on the receptacle B and into the receptacle C where it is guided by reels 11, 12 on a vertically movable member 7 and a roller 105 fixed in the receptacle C. Thence it passes into a washing bath E<1> having wiping rollers 110, 111 at its exit, and finally to a toothed wheel 112. When the change from receptacle C to receptacle B is made the reels 11, 12 move upwards out of receptacle C while reels 11, 12 over receptacle B move down into it, after which the three receptacles are pushed bodily forwards by an arm 37 at the feeding rate of the film to bring the receptacle B into the place of receptacle C. Receptacle C is then removed and the arm 37 returned to its former position allowing another receptacle to be brought into the place of receptacle A. The reel-carrying elements 7, which an four in number as shown in Fig. 3 are slidablv carried on four radial arms 4 of a central spindle 1, and occupy successively the " waiting position " a e, the active position " a g, the " washing position " a, d and the "dripping position a, b, the angular position of the reels and the radial position of their vertical guidercds 6 being adjusted by rollers working in grooves 25, 28, Fig. 15 of a cam at the top of the machine. The required vertical movements of the reels in the " waiting " and " active " positions are derived from the engagement of rollers 66, 75 with cam grooves in a positively actuated cylinder 91 which through racks and spur-wheels operate bars 84, 85 on a carriage 72 to engage projections 8 on the reel-carrying members 7 so as to depress and keep depressed the two pairs of reels in positions a e, a g, and an arm 86 on a carriage 82 which engages the projection 8 of the rising reels actuated by the counterweights 19. The carriage 82 also carries a rod 88 or lug 9 on which as a new receptacle comes into use opens a feed cock 63, Fig. 13 of a tank 62 arranged on the receptacle to maintain the liquid level. The downward movement into the " washing position " a d is effected by a square threaded screw 100 ard the upward movement in the " draining position " a b by a cam 101. A cam 102 serves to keep in raised position wipers 16, Figs. 2 and 12 mounted on the rods 6 and moved from operative to inoperative position as the reels rise from the dyeing vessel by straight cams 35 on a moving member 39. The pusher 37 which moves the vessels A, B, C, and which also effects the intermittent rotation of the shaft 1 by a ratchet and pawl is actuated from a hook 43 engaged by a tappet 55 on a chain 52 actuated by wheels 53, 54 operated from a wheel 56 on the driving shaft 93, actuated through a clutch, the hook 43 moving out of engagement with the tappet at times determined' by the engagement of a rod 44 on the sliding member 39 with a straight cam 45. The moving member 39 is moved back to reset bv disengaging the hook 43 by means of a handle 47. The moving vessel C is held during its movement by a spring actuated lever 123 mounted on an arm 38 of the sliding member 39, and a button 122 on it may be arranged to give a signal indicating the end of the changing operation.