Reinforcing asbestos-cement sheets

Claim 1

THE PROCESS OF FORMING REINFORCED SHEETS COMPRISING THE STEPS OF WINDING A WEB OF THIN PLASTIC MATERIAL ON A ROTARY CYLINDER TO FORM A MULTI-LAYER TUBE, PLACING A FIRST REINFORCING SEGMENT WHOSE LENGTH IS A FRACTIONAL PART OF THE CIRCUMFERENCE OF THE TUBE BETWEEN THE WEB AND THE LAST LAYER ALREADY FORMED ON THE TUBE, THE LEADING END OF SAID FIRST REINFORCING SEGMENT BEING POSITIONED ADJACENT THE POINT WHERE THE WEB REACHES THE TUBE, CONTINUING THE WINDING OF THE WEB ON THE CYLINDER THROUGH PART OF A REVOLUTION TO WRAP THE FIRST REINFORCING SEGMENT AROUND THE TUBE, SPACING THE LEADING END OF A SECOND REINFORCING SEGMENT WHOSE LENGTH IS SLIGHTLY LESS THAN THE DIFFERENCE BETWEEN THE CIRCUMFERENCE OF THE TUBE AND THE LENGTH OF THE FIRST SEGMENT SLIGHTLY BEHIND THE TRAILING END OF SAID FIRST SEGMENT, CONTINUING THE WINDING TO WRAP SAID SECOND SEGMENT ABOUT THE TUBE WHEREBY SAID SEGMENTS ARE LOCATED BETWEEN TWO OF THE LAYERS AND HAVE THEIR ADJACENT ENDS SPACED SLIGHTLY FROM ONE ANOTHER TO PROVIDE THE TUBE WITH TWO CIRCUMFERENTIALLY SPACED UNREINFORCED PARTS, CUTTING SAID TUBE LONGITUDINALLY THROUGH ONE OF SAID UNREINFORCED PARTS, AND FLATTENING OUT OF THE TUBE TO FORM A SHEET.