Information dissemination apparatus

Claim 1

A THREE-DIMENSIONAL CONTOURED DISPLAY PICTURE COMPRISING A THIN UPPER SHEET, A THIN BACKING SHEET, AND A MIDDLE SHEET SLIDABLY DISPOSED BETWEEN THE UPPER AND LOWER SHEETS, SAID UPPER SHEET HAVING ITS CENTRAL PORTIONS CONTOURED IN RELIEF REPRESENTING THE THREE DIMENSIONAL PICTURE DESIRED AND HAVING A RAISED BORDER CONTOUR LOCATED SLIGHTLY INWARD FROM THE PERIPHERY TO REINFORCE THE UPPER SHEET AGAINST BENDING AND TO PROVIDE AN INTEGRAL FRAME ABOUT THE RELIEF PICTURE, THE EDGES OF THE UPPER SHEET ABOUT THE PERIPHERY OF THE UPPER SHEET DISPLACED TRANSVERSELY BELOW ALL OTHER PORTIONS OF THE SHEET AND ENGAGING WITH THE BACKING SHEET, WHEREBY ALL PORTIONS OF THE UPPER SHEET ARE SPACED FROM THE BACKING SHEET EXCEPT THE ENGAGING EDGES THEREOF, SAID MIDDLE SHEET HAVING A RETAINING TAB AT ONE END THEREOF AND SAID BACKING SHEET HAVING A SLOT DISPOSED SUBSTANTIALLY PARALLEL TO AND OFFSET FROM ONE EDGE THEREOF TO SLIDABLY RECEIVE THE MIDDLE SHEET FOR SLIDING MOVEMENT IN THE SPACE PROVIDED BETWEEN THE UPPER SHEET AND BACKING SHEET BUT SAID SLOT BEING OF INSUFFICIENT LENGTH TO PERMIT THE PASSAGE OF THE OUTSTANDING TAB ON THE MIDDLE SHEET FROM PASSING THERETHROUGH, SAID SLOT IN THE BACKING SHEET PROVIDING GUIDANCE FOR THE EDGES OF THE MIDDLE SHEET PERMITTING ONLY SLIDING MOVEMENT OF THE MIDDLE SHEET BETWEEN THE UPPER SHEET AND THE BACKING SHEET, AND SAID MIDDLE SHEET HAVING A PORTION OF ITS SURFACE CONTINUOUSLY DISPOSED BENEATH A DEPRESSED PORTION OF THE UPPER SHEET LOCATED SLIGHTLY INWARD OF THE RAISED BORDER, THEREBY TO PROVIDE GUIDANCE ALONG A DIFFERENT EDGE OF SAID MIDDLE SHEET AND PREVENT MOVEMENTS OF SAID MIDDLE SHEET AT SAID DIFFERENT EDGE OTHER THAN SLIDING RELATIVE TO SAID UPPER AND BACKING SHEETS, SAID MIDDLE SHEET CONTAINING SPACED INDICIA PERTAINING TO THE RELIEF PORTIONS OF THE UPPER SHEET.