Light-sensitive sheets and process for producing transfer images

Claim 1

A LIGHT-SENSITIVE PHOTOGRAPHIC TRANSFER SHEET COMPRISING A SHEET-LIKE SUPPORT PERVIOUS TO ACTINIC LIGHT, A PERMANENT REFLECTOGRAPHIC LIGHT SCREEN PERMANENTLY UNITED WITH AND COVERING THE AREA OF SAID SUPPORT, SAID SCREEN BEING COMPOSED OF A MYRIAD OF SCREEN PARTS SUBSTANTIALLY IMPERVIOUS TO SAID LIGHT INTERSPERSED IN A REGULARLY SHAPED PATTERN, WITHOUT INTERMEDIATE GRADATED TRANSITIONS, WITH SCREEN AREAS PERVIOUS TO SAID LIGHT, SAID LIGHT-PERVIOUS SCREEN AREAS COVERING A SMALLER PROPORTION OF THE AREA OF SAID SUPPORT THAN SAID LIGHT-IMPERVIOUS SCREEN PARTS, AND A LAYER STRUCTURE ADHERENTLY UNITED WITH BUT TRANSFERABLE FROM ONE SIDE OF SAID SUPPORT AND LYING ADJACENT TO SAID SCREEN, SAID STRUCTURE INCLUDING A LIGHT SENSITIVE LAYER COVERING SAID SCREEN AND FORMING AN OUTER SURFACE OF SAID SHEET AND CONTAINING A LYOPHILIC ORGANIC COLLOID SENSITIZED WITH A COMPOUND WHICH UPON EXPOSURE TO SAID LIGHT MATERIALLY ALTERS AN ADHESION POWER POSSESSED BY SAID LAYER IN THE PRESENCE OF A LIQUID THAT WETS SAID COLLOID, SAID COMPOUND BEING SELECTED FROM THE GROUP CONSISTING OF LIGHTSENSITIVE DIAZO COMPOUNDS AND LIGHT-SENSITIVE AZIDO COMPOUNDS AND BEING PRESENT AT LEAST AT SAID OUTER SURFACE, AT LEAST ONE OF THE CONSTITUENTS OF SAID STRUCTURE BEING A SUBSTANCE COHERING WITH SAID COMPOUND AND ADAPTED TO FORM A DURABLE IMAGE ON A RECEIVING SURFACE AND SELECTED FROM THE GROUP CONSISTING OF FINELY DIVIDED PIGMENTS, DYESTUFFS AND HYDROPHOBIC SOLID MATTER, SAID LIGHT-SENSITIVE LAYER STRUCTURE BEING SUBSTANTIALLY FREE AT LEAST OVER SAID LIGHT-PERVIOUS AREA FROM GRAINS THAT SCATTER ACTINIC LIGHT AND NORMALLY BEING NON-TACKY, SAID LAYER TOGETHER WITH AT LEAST PART OF SAID IMAGE-FORMING SUBSTANCE BEING ADHERABLE TO A RECEIVING SURFACE WITH A STRENGTH GREATER THAN THAT OF THE ADHERENCE THEREOF TO OTHER PARTS OF THE SHEET, AND THUS BEING TRANSFERABLE BODILY FROM SAID SCREENED SUPPORT TO SAID RECEIVING SURFACE, BY A PRESSING OF SAID RELAYER WITH SAID LIQUID FOLLOWED BY A PRESSING OF SAID RECEIVING SURFACE AGAINST SAID OUTER SURFACE AND A SEPARATION OF SAID RECEIVING SURFACE FROM SAID OUTER SURFACE, SAID LAYER BEING DIVISIBLE IMAGEWISE BY AN IMAGEWISE EXPOSURE THEREOF TO SAID LIGHT INTO TWO DISTINCT GROUPS OF LATENT IMAGE PORTIONS RESPECTIVELY LYING IN THE EXPOSED AND RELATIVELY UNEXPOSED AREAS THEREOF AND SO DIFFERING IN THEIR ADHESION POWERS THAT THE IMAGE PORTIONS OF ONE OF SAID GROUPS, WITH AT LEAST IN PART THE PORTIONS OF SAID IMAGEFORMING SUBSTANCE LOCATED IN THE CORRESPONDING AREAS OF THE SHEET, ARE SELECTIVELY ADHERABLE TO SAID RECEIVING SURFACE AS AFORESAID AND SEVERABLE FROM THE OTHER PARTS OF THE SHEET, AND THUS ARE SELECTIVELY TRANSFERABLE BODILY AS AFORESAID TO FORM AN IMAGE OF SAID SUBSTANCE ON SAID RECEIVING SURFACE.