Patent ID: 9089722
Filing Date: 2015-07-28
Classification: A62B,Y10T

Abstract:
1. Filter cartridge ( 1 ) for an air filtering device, in particular for a filtering face mask ( 15 ), comprising a stiff cup-shaped casing ( 2 ) having a bottom ( 4 ) and a circumferential sidewall ( 5 ) extending at least section-wise parallel to one axis, a stiff discoidal lid ( 3 ) and a filter bed ( 14 ) of loose filter material compressed between the lid ( 3 ) and the casing ( 2 ), the lid ( 3 ) and the bottom ( 4 ) containing each at least one through-hole ( 67 ) so that air to he filtered passes through the filter bed ( 14 ), and at least one of the lid ( 3 ) and the bottom ( 4 ) being curved to at least one direction, whereby the lid ( 3 ) is at least essentially arranged within the casing ( 2 ), the outermost contour of the lid ( 3 ) close-fitting to the inner contour of the Sidewall, ( 5 ), and fixed thereto by a direct connection, particularly by a non-detachable connection.