Photographic film reel reel improved for revelation (Machine-translation by Google Translate, not legally binding)

摘要

Improved photo film reel for developing, of the type comprising two reciprocally operable discs with reciprocating forward and backward movement and said respective discs comprising spiral film winding guides, essentially characterized by the fact that on the inner side of each disc, next to the edge of the same, in the input slot of the film to the spiral guide is arranged a small freely rotating roller in a box that widens from the entrance area of the film, so that the when the film is inserted, the rollers are displaced by friction forwards, that is, towards the wide end of the box, leaving enough space between the roller and the upper wall of the box for the free passage of said film, once inserted the free end of said film, its forward drag and consequent rolling by the forward rotation and recoil of any one of the discs with respect to the other, since when advancing one of the discs its roller moves backward, that is, towards the end of the smaller width of the cassette, with which it clamps, by wedging, the film and produces its drag, because the roller of the other disc, due to the advance of the film, moves towards the front end of the box, that is, the wider one, allowing the free advance movement of said film, producing an inverse effect when the disc carrying the roller that produces the drag of the film or its end of stroke arrives and start its movement backwards, since then it is the roller of the other disc that effects the impingement of the film. (Machine-translation by Google Translate, not legally binding)