Methods and devices for cutting composite material and sealing devices made of composite material

摘要

Then invention relates to seals, methods for making seals and devices for making seals wherein the seals comprise a rigid substrate with two substantially parallel major surfaces (106, 108) wherein said surfaces are separated by a cut surface (110). The cut surface (110) comprises a first burnished region (119) of height p1 and a second burnished region (121) of height p2 wherein said first and second burnished regions are separated by a rough breakout (123) of height b.