초록 ▼

An improved method for fabricating a filter for use in automotive air bag inflators which comprises forming a hollow cylindrical inner core or combustion screen of filter material and outer filter layers wound outward from the surface of the core so as to be maintained in cylindrical relation therea

An improved method for fabricating a filter for use in automotive air bag inflators which comprises forming a hollow cylindrical inner core or combustion screen of filter material and outer filter layers wound outward from the surface of the core so as to be maintained in cylindrical relation thereabout. This invention is specifically directed to an improved filter which does not include a perforated support tube and relies on only the interior combustion screen for support in the final wrapping of the remaining filter structure.

대표청구항 ▼

A method for making a cylindrical filter assembly for an air bag inflator consisting of multiple layers of filter material comprising the steps of: forming a hollow cylindrical member having at least one open end and internal and external surfaces of at least one layer of expanded metal or metal wir

A method for making a cylindrical filter assembly for an air bag inflator consisting of multiple layers of filter material comprising the steps of: forming a hollow cylindrical member having at least one open end and internal and external surfaces of at least one layer of expanded metal or metal wire, sizing and welding said hollow member to form an inner core of said filter assembly, forming additional filter material comprising second, third and fourth layers of different filter material by cutting said layers to length and laying them up in laminate form, wrapping said laminate of filter material concentrically about said inner core member by attaching the leading end of said second layer to the outer surface of said inner core member in such a manner that the leading end of said second layer is in overlapping contact with said inner core, the leading end of said third layer is in overlapping contact with said second layer, the leading end of said fourth layer is in overlapping contact with said third layer and is located intermediate said second and third layers and wherein the trailing ends of said third and fourth layers terminate at approximately the same point within said assembly, and joining the trailing end of the radially most outward layer of filter material to the filter assembly.