The invention refers to a light box for photographic transparencies or the like.
In a known, single or double-sided light box there is provided for each group of supporting plates a special supporting frame, which can be frontally inserted respectively in the outer frame and can be secured in position therein by snap-closures or by screws. The supporting frame consists of many parts and has to be opened and closed again for a change of the photographic transparency. Such a configuration is relatively complicated, expensive to produce, inconvenient to handle when the photographic transparency is changed, and can only be utilized for light boxes of angular shapes.
USPTO Backgrounds
USPTO Backgrounds