Porous mat for oil or gas burner consists of ceramic and or metal fibers or fiber pieces, with openings in of varying cross section

摘要

The highly porous mat (1) is made of ceramic and or metal fibers and or fiber pieces (2) permanently joined together. Distributed over the plane of the mat are places possessing varying gas-permeability in the form of openings (3,4) with differing cross-sections for flow. The cross-section of the holes changes continually.