Pressure responsive material

Claim 1

A MULTI-LAYER LAMINATE MATERIAL FOR CONCURRENTLY PRODUCING A PERMANENT MARKING WHICH IS LEGIBLE AT A PRESSURE SENSITIVE SURFACE AND A RELATIVELY TEMPORARY MARKING ON A SURFACE OF A LIGHT TRANSMITTING PLATEN, WHICH LAMINATE MATERIAL COMPRISES A WEB HAVING A FRONT SURFACE FOR RECEIVING PRINTING PRESSURE AND AN ABSORBENT SHEET CONTAINING A MULTITUDE OF MINUTE FRACTURABLE CAPSULES CONTAINING PRINTING FLUID, A CONTINUOUS LAYER OF PRESSURE SENSITIVE ADHESIVE STRONGLY ADHERING TO THE BACK SURFACE OF SAID WEB, AND A SEPARATE ADHESIVE-PERMEABLE LAYER OF PARTICULATE NON-ADHESIVE MATERIAL ADHERING DIRECTLY TO AND BACKING SAID ADHESIVE LAYER IN AN AMOUNT SUFFICIENT TO SUPPORT SAID ADHESIVE LAYER FROM A SUPPORT SURFACE UNDER THE WEIGHT OF SAID WEB BUT INSUFFICIENT TO PREVENT PASSAGE OF THE ADHESIVE THROUGH SAID PERMEABLE LAYER UNDER MARKING FORCE APPLIED TO SAID FRONT SURFACE, SAID ADHESIVE HAVING (1) PROPER TACKINESS TO RELEASABLY ADHERE TO THE SURFACE OF THE LIGHT TRANSMITTING PLATEN UNDER A FORCE APPLIED TO THE FRONT SURFACE SUFFICIENT TO FRACTURE THE CAPSULES, (2) GREATER ADHESIVENESS TO SAID PAPER SHEET THAN TO THE PRISM FACE AND (3) GREATER COHESIVENESS THAN THE ADHESIVENESS TO THE SURFACE OF THE LIGHT TRANSMITTING PLATEN.