Patent GB-565836-A (GB)
Title: Improvements in or relating to cinematographic film registration
IPC: G03C7/22
Filed: 1943-02-01
Abstract: 565,836. Registering kinematograph films. TECHNICOLOR MOTION PICTURE CORPORATION. Feb. 1, 1943, No. 1663. Convention date, April 24, 1942. [Class 98 (ii)] A number of kinematograph films having corresponding record sequences are successively registered on a carrier having a succession of register teeth engaging the sprocket holes of the films by successively feeding the films on to the carrier so that the same teeth engage the holes of the different films corresponding to the same records of the sequences respectively, whereby non-uniformity in successive teeth has corresponding effect in the registration of the different films. The carrier may be an endless toothed belt. The arrangement is used in the successive printing of dyeimbibition matrices on to a blank film or in the successive stripping on to separate bases of the layers of a multilayer film, which may comprise a support carrying three superimposed layers of emulsion, the bottom layer being permanently attached to the support, the middle layer being attached to the bottom layer by means of an alcohol-soluble adhesive, and the top layer being attached to the middle layer by means of a water-soluble adhesive. As shown, the apparatus comprises two drums 11 over which passes an endless toothed belt 12, in which both the belt and the teeth may be of metal. A multilayer film 6 is fed from a spool 16 and a support from a spool 17 through a water-tank 20 to soften the water-soluble adhesive layer between the top and middle layers of the film 6 and then through pairs of rollers 19, 18 on to the belt. During passage round the first drum 11, separation of the teeth forces the film 6 and support 10 more tightly together and the top layer of the film 6 is transferred to the support 10. During passage through a drying chamber 29, the support 10 with its attached layer is peeled off and wound on to a take-up spool 30, and the film 6 is passed over guide rolls to a second station where it is fed back on to the belt into superposed relationship to a new support 34 and through an alcohol-containing tank 35 to loosen the adhesive between the middle and bottom layers on the film 6. In the drying chamber 45 the support 34 with its attached layer is wound off on to spool 47 and the film 6 with its remaining bottom layer is wound off on to spool 46. A similar arrangement is described for printing from two dye-imbibition matrices, the belt may be trained over two pairs of drums as in Specification 353,962, or three drums may be arranged at the corners of a triangle. In order to enable the films to be fed at the successive stations so that the same belt teeth engage corresponding sprocket holes in the films, each tooth or group of teeth may be numbered or coloured, or the splice where the two ends of the belt are joined may be used as a marker. The separated layers of a multilayer film may be developed, using different developers or different times of development, or both. Specifications 307,659, 319,924, [both in Class 98 (ii)], 353,777, 536,463, 543,113, 545,701 and 565,838 also are referred to.