Methods of molding reinforced organic plastics for the production of curved plates

Claim 1

IN THE METHOD OF MOLDING A HELMET OF REINFORCED ORGANIC PLASTIC MATERIALS IN A TWO PART MOLD SHAPED TO FORM THE HELMET IN WHICH THE REINFORCING IS PLACED BETWEEN THE TWO PARTS OF THE MOLD TOGETHER WITH THE ORGANIC PLASTIC MATERIALS TO BE MOLDED, THE STEPS COMPRISING WINDING A PLURALITY OF LAYERS OF FILAMENTS ON A NUMBER OF PLANE POLYGONAL FRAMES, THE SIDES OF EACH FRAME BEING RESILIENTLY BENDABLE IN THE PLANE OF THE FRAME, THE FILAMENTS IN ONE LAYER CROSSING THE FILAMENTS IN AN ADJACENT LAYER, EACH OF SAID FRAMES LIMITING AN AREA GREATER THAN THE AREA OF THE HELMENT TO BE MOLDED, PLACING THE FRAMES CARRYING THE WOUND FILAMENTS BETWEEN THE TWO PARTS OF THE MOLD TOGETHER WITH THE ORGANIC PLASTIC MATERIAL, MOVING THE TWO PARTS OF THE MOLD TOWARD ONE ANOTHER THEREBY DEFORMING THE INTERCROSSING LAYERS OF WOUND FILAMENTS CARRIED BY THE FRAMES TO CORRESPOND TO THE SHAPE OF THE MOLD FOR THE HELMET AND SIMULTANEOUSLY BENDING THE SIDES OF THE FRAMES INWARDLY, AND SUBJECTING THE CONTENTS OF THE MOLD TO MOLDING CONDITIONS TO PRODUCE A REINFORCED PLASTIC HELMET.