Patent ID: 7758795

Claim:
A method of making a pollution control device, said method comprising: forming a flexible and self-supporting insulating end cone comprising a single, continuous piece of resilient and compressible non-intumescent insulating material, the insulating material comprising inorganic fibers and an organic binder, and the insulating end cone having a three dimensional cone shape, where said forming comprises shaping non-intumescent insulating material into the three dimensional cone shape using a mold; and disposing the insulating end cone within a gap between inner and outer end cone housings of the pollution control device, wherein the insulating end cone is dimensioned so as to fill the gap between the end cone housing, such that there is no air space between the insulating end cone and either end cone housing, the insulating end cone maintains its three dimensional cone shape under the force of gravity, when placed on a level surface prior to said disposing, and the insulating end cone exhibits a resiliency value of about 35 to about 97 percent when evaluated using the Resiliency Test Method.