Patent ID: 6607052
Filing Date: 2003-08-19
Classification: F01N

Abstract:
A process for filling a muffler shell with fibrous material comprising the steps of:providing a muffler shell comprising one or more muffler shell outer parts which define an internal cavity and an internal structure adapted to extend at least part way through the shell internal cavity and having one or more openings adapted to communicate with the shell internal cavity; providing a bag filled with fibrous material, said bag having a first side with one or more first perforations defining a first side total open area and a second side with either no perforations or one or more second perforations defining a second side total open area, said first open area being greater than said second open area; positioning said fibrous material-filled bag adjacent said internal structure such that said first side is nearest to said internal structure; and drawing a partial vacuum through said internal structure, said partial vacuum drawing said fibrous-filled bag inwardly towards said internal structure.