Pocket for micro-film jackets

Claim 1

IN COMBINATION, A RECORD HOLDER FORMED OF A SHEET OF TRANSPARENT PLASTIC MATERIAL FORMED WITH UPPER AND LOWER EDGES EXTENDING IN SPACED SUBSTANTIALLY PARALLEL RELATION OVER THE ADJACENT PORTIONS TO FORM GUIDE CHANNELS AT OPPOSITE SIDES OF SAID SHEET OF TRANSPARENT PLASTIC MATERIAL AT THE FRONT SIDE THEREOF, MEANS DETACHABLY MOUNTING SAID HOLDER ON A SUPPORTING SHEET, AND A JACKET HAVING A PAIR OF TRANSPARENT PLASTIC SHEETS MOUNTED IN SUPERIMPOSED COINCIDENT RELATION, SPACING STRIPS MOUNTED BETWEEN SAID PAIR OF SHEETS IN SPACED PARALLEL RELATION TO FORM A PLURALITY OF POCKETS, MEANS SECURING SAID PAIR OF SHEETS AND SPACING STRIPS TOGETHER FOR SLIDABLY RECEIVING MICROFILM STRIPS IN SAID POCKETS AND ONE OF SAID PAIR OF SHEETS HAVING A MARGINAL PORTION EXTENDING BEYOND THE ADJACENT PORTION OF THE OTHER OF SAID PAIR OF SHEETS FOR MOUNTING AN INDEX STRIP, SAID JACKET BEING FORMED FOR SLIDABLE ENGAGEMENT IN SAID GUIDE CHANNELS WITH THE MARGINAL PORTION OF SAID ONE OF SAID PAIR OF SHEETS AND THE OPPOSITE MARGINAL PORTION OF SAID JACKET BEING DISPOSED IN SAID GUIDE CHANNELS AND EXPOSED THROUGH THE TRANSPARENT UPPER AND LOWER EDGES OF SAID RECORD HOLDER, WHEREBY THE MICROFILM IN SAID JACKET AND THE INDEX STRIP ON THE MARGINAL PORTION ARE FULLY VISIBLE THROUGH THE TRANSPARENT SHEET MATERIAL OF SAID HOLDER AND JACKET.