Filter cartridge, filetering face mask and method for manufacturing

摘要

The invention relates to a filter cartridge for an air filtering device, in particular for a filtering face mask and a method for manufacturing a filter cartridge, comprising a stiff cup-shaped casing having a bottom and a circumferential sidewall extending at least section-wise parallel to one axis, a stiff discoidal lid and a filter bed of loose filter material compressed between the lid and the casing, the lid and the bottom containing each at least one through-hole so that air to be filtered passes through the filter bed, and at least one of the lid and the bottom being curved to at least one direction, whereby the lid is at least essentially arranged within the casing, the outermost contour of the lid close-fitting to the inner contour of the sidewall, and fixed thereto by a direct connection, particularly by a non-detachable connection.

主权项

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 (6,7) so that air to be filtered passes through the filter bed (14), and at least one of the lid (3) and the bottom (4) 10 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.