Dimensionally stable sheet material for reproduction purposes

Claim 1

A TRANSLUCENT SHEET FOR REPRODUCTION PURPOSES COMPRISING SYNTHETIC RESIN HAVING IMBEDDED THEREIN GLASS MONOFILAMENTS, TWO PLANAR LAYERS OF SAID MONOFILAMENTS, SAID MONOFILAMENTS BEING SUBSTANTIALLY PARALLEL TO ONE ANOTHER, THE MONOFILAMENTS IN EACH LAYER SUBSTANTIALLY HAVING THEIR AXES IN THE SAME PLANE, THE AXES OF MONOFILAMENTS IN ONE OF SAID LAYERS BEING DISPOSED AT AN ANGLE TO THE AXES OF SAID MONOFILAMENTS IN THE OTHER OF SAID LAYERS, SUBSTANTIALLY EACH OF SAID MONOFILAMENTS EXTENDING SUBSTANTIALLY FROM AN EDGE OF SAID SHEET TO ANOTHER EDGE OF SAID SHEET, CHARACTERIZED BY SAID SYNTHETIC RESIN HAVING BEEN POLYMERIZED WHILE SAID MONOFILAMENTS WERE MAINTAINED UNDER TENSION AND BY BEING ADAPTED TO BE A BASE FOR GRAPHIC REPRODUCTION AND FURTHER CHARACTERIZED BY SMOOTH NON-WAVY SURFACES OF SAID SHEET AND BY SAID SYNTHETIC RESIN BEING A FLEXIBLE THERMOSETTING SYNTHETIC RESIN AND BY THE INDEX OF REFRACTION OF THE GLASS IN SAID MONOFILAMENTS BEING AT LEAST APPROXIMATELY EQUAL TO THE INDEX OF REFRACTION OF SAID SYNTHETIC RESIN AND BY POSSESSING THE CHARACTERISTICS OF SUCH A SHEET IN WHICH SAID SYN THETIC RESIN IS CHEMICALLY ATTACHED TO SAID GLASS MONOFILAMENTS THROUGH AN ADDITION BOND PROVIDED BY A VINYLSILICON RADICAL ATTACHED TO THE SURFACE OF SAID GLASS MONOFILAMENTS.