Holder for stacked sheet material

Claim 1

A SHEET MATERIAL HOLDER COMPRISING IN COMBINATION: A BASE MEANS INCLUDING A PAIR OF RECTANGULAR PLATES SECURED TOGETHER AND HAVING A SPACE FORMED THEREBETWEEN, ONE OF SAID PLATES HAVING AT LEAST ONE INDENTATION FORMED THEREIN AT ONE OR MORE OF THE CORNERS THEREOF, SAID INDENTATION FACING THE OTHER OF SAID PLATES; FRONT PANEL MEANS HINGEDLY CONNECTED TO SAID BASE MEANS AT A FRONT EDGE THEREOF AND MOVABLE TO A VERTICALLY DISPOSED POSITION; CORNER PANEL MEANS INCLUDING A PAIR OF PLATES EACH HAVING WING PORTIONS DISPOSED AT RIGHT ANGLES TO EACH OTHER AND HAVING FURTHER A FLANGE AT THE BASE THEREOF AT RIGHT ANGLES TO SAID WING PORTIONS, SAID FLANGE HAVING AT LEAST ONE DEPRESSION FORMED THEREIN, EACH PLATE REMOVABLY ASSEMBLED TO SAID BASE MEANS AT A CORNER THEREOF WITH SAID FLANGE INSERTED INTO SAID SPACE WITH SAID DEPRESSION ALIGNED WITH SAID INDENTATION, AND WITH THE WING PORTIONS VERTICALLY DISPOSED ALONG REAR AND SIDE EDGES OF SAID BASE MEANS; COVER MEANS FOR THE SHEET MATERIAL PLACEABLE BETWEEN SAID FRONT PANEL MEANS WHEN VERTICALLY DISPOSED AND SAID CORNER PANEL MEANS, AND DISPOSED OVER SAID BASE MEANS SO AS TO COMPRESS THE SHEET MATERIAL DOWNWARDLY THEREAGAINST; AND MAGNETIC MEANS MOUNTED ON SAID COVER MEANS AND MAGNETICALLY ENGAGEABLE WITH SAID FRONT PANEL MEANS WHEN VERTICALLY DISPOSED AND WITH SAID CORNER PANEL MEANS.