Patent ID: 6258439
Filing Date: 2001-07-10
Classification: B29C,E04D,Y10T

Abstract:
A deformable roofing material for covering the roof of a building, said roofing material comprising:a substrate;said substrate comprising a first side and a second side. disposed opposite said first side;said substrate comprising a plurality of openings;a layer of material covering substantially all of said substrate;said layer of material being an originally thin flat stock;said layer of material comprising a first side and a second side disposed opposite said first side;said first side of said layer of material being disposed against said first side of said substrate to cover said plurality of openings in said substrate;said substrate and said layer both compressed by at least 25% of their original length in a direction opposite a direction of desired extension such that said layer is a creped layer;said compressed creped layer having a plurality of irregular corrugations covering substantially all of said second side of said creped layer;said compressed substrate and said compressed creped layer with corrugations both being configured to be expandable in the direction of desired extension;said roofing material having a width and a length;said compressed substrate and said compressed creped layer with corrugations both extending substantially completely across both the width and the length of said roofing material;said irregular corrugations having lengths; andsaid lengths of said irregular corrugations being substantially smaller than said width of said roofing material;said layer of creped material comprises an air permeable compressed creped material;said layer of creped material comprises a liquid repellent compressed creped material;said layer of compressed creped material comprises a non-woven material;said compressed creped layer of material is a first layer of creped material;said covering material comprises a second layer of compressed creped material;said compressed creped second layer of material being an originally flat stock;said second layer of material comprising a first side and a second side disposed opposite said first side;said second side of said second layer of material being disposed against said second side of said substrate to cover said plurality of openings in said substrate;said substrate and said second layer both compressed by at least 25% of their original length in a direction opposite a direction of desired extension such that said layer is a creped layer;said compressed creped second layer having a plurality of irregular corrugations covering said creped layer;said compressed substrate and said first and said second compressed creped layer with corrugations all three being configured to be expandable in the direction of desired extension;said compressed substrate and said first and said second compressed creped layer with corrugations all three extending substantially completely across both the width and the length of said roofing material;said irregular corrugations covering said second layer having lengths;said lengths of said irregular corrugations being smaller than said width of said roofing material;the substrate comprises a rib mesh,said first layer comprises a polyacrylonitrile non-woven;said second layer comprises a polyester non-woven; andsaid substrate comprises aluminum.