Photographic roll film transfer process

Claim 1

A PROCESS FOR PRODUCING DIRECT POSITIVE PHOTOGRAPHIC IMAGES BY TRANSFER OF A SILVER COMPOUND FROM A LIGHTSENSITIVE LAYER TO A LIGHT-INSENSITIVE LAYER WHICH COMPRISES EXPOSING TO AN OBJECT OR IMAGE A PHOTOGRAPHIC SILVER HALIDE EMULSION LAYER COATED ON ONE SIDE OF AN OPAQUE SUPPORT, THE OPPOSITE SIDE OF SAID SUPPORT HAVING THEREON A BACKING LAYER CONTAINING SILVER SALT PHYSICAL DEVELOPMENT NUCLEI, TREATING SAID EMULSION LAYER WITH AN ALKALINE SOLUTION IN THE PRESENCE OF A SILVER HALIDE DEVELOPING AGENT TO INITIATE AND PROMOTE DEVELOPMENT OF THE SILVER HALIDE, ROLLING THE SUPPORT ON ITSELF SO THAT THE DEVELOPED AND WET EMULSION LAYER CONTACTS THE BACKING LAYER CONTAINING THE PHYSICAL DEVELOPMENT NUCLEI, IN THE PRESENCE OF A SILVER HALIDE SOLVENT, AND MAINTAINING CONTACT BETWEEN THE EMULSION LAYER AND THE BACKING LAYER FOR A TIME SUFFICIENT TO TRANSFER SILVER SALT FROM THE UNDEVELOPED AREAS OF THE EMULSION LAYER TO THE BACKING LAYER, THEREBY FORMING A POSITIVE IMAGE IN THE BACKING LAYER.