GB987506A - Improvements in or relating to the treatment of films - Google Patents

Abstract

987,506. Treating continuous webs. W. ZINDLER, [trading as LUMOPRINT ZINDLER KOMM. GES]. Jan. 28, 1963 [Feb. 17, 1962], No. 3457/63. Heading D1L. [Also in Division G2] Two photographic films are treated by flowing the treatment substance between them in face-toface relationship, and then bringing the heated films into mutual contact so as to effect an image transfer. The process is carried out by the apparatus shown. The two film sheets are introduced through openings 2, 3, and pass to a coating unit 5. This is a hollow member having two curved walls which meet in a front edge 26 and a rear edge 27. The coating material is fed to unit 5 through a conduit 6 from a storage container 7. An opening 8 in the upper part of the container is closed by a movable member 9 mounted on a pivoted lever 10. The lever is loaded by a spring 16 so that normally member 9 closes opening 8, but the lever can be tilted to open it by the action of a linkage system 11, 12. This is actuated by the front edges of the sheets as, after insertion, they pass between guide plates 17, 18, 19. Actuation of the linkage 11, 12 and the lever 10 lifts plug 9 out of opening 8, and allows liquid to be dispensed to unit 5, whence it is distributed through a number of openings 25 in both the upper and lower walls to the two sheets passing one above and one below. At the same time, switch contacts 40, 41 are closed to complete a circuit energizing electrical heating elements 23 incorporated in unit 5. As the rear edge of the sheets pass away from the linkage system, the opening 8 is closed again and the heaters switched off. The sheets are then squeezed together between rollers 33, 34 and pass out of the apparatus through an outlet 4. Alternatively the plug 9 can be lifted out of opening 8 by electro-mechanical means, which may be operated by the sheets interrupting a beam of light falling on a photoelectric cell.