Sheets of coated paper

Claim 1

SHEETS OF PAPER COATED WITH THIN LAYERS OF DIFFERENT KINDS ON THEIR TWO FACES, SAID COATED SHEETS, WHEN SUPERPOSED WITH EACH FACE THEREOF HAVING A COATING LAYER OF A FIRST KIND IN CONTACT WITH ANOTHER FACE THEREOF HAVING A COATING LAYER OF A SECOND KIND, BEING ADAPTED TO TRANSFER THE INSCRIBING MADE ON THE UPPER SHEET BY A PRESSUREEXERTING MEMBER TO ALL THE SHEETS PLACED THEREUNDER, EACH THIN COATING LAYER OF A FIRST KIND CONSISTING ESSENTIALLY OF RESIN FILMM DEPOSITED TO HAVE A MICROPOROUS STRUCTURE AND OF AN AMORPHOUS FILLER WIDELY DISTRIBUTED THROUGHOUT SAID RESIN AND IN AN AMOUNT SUFFICIENT TO RENDER THE RESIN FRIABLE BUT NOT OVER 50% BY WEIGHT, WHEREBY EACH COATING LAYER OF A FIRST KIND IS LOCALLY BROKEN INTO SHARPLY OUTLINED FRAGMENTS BY THE INSCRIBING PRESSURE, WHEREAS EACH THIN COATING LAYER OF A SECOND KIND IS ADAPTED TO RETAIN THE BROKEN PFRAGMENTS OF THE FRANGIBLE COATING LAYER OF A FIRST KIND IN CONTACT THEREWITH, WHEN THE SUPERPOSED SHEETS, THE INSCRIBING HAVING BEEN MADE THEREUPON, ARE SEPARATED FROM ONE ANOTHER.