Patent ID: 11950749
Assignee: NUMATIC INTERNATIONAL LIMITED
Field: Chemical engineering (Chemistry)
Classification: CPC A  B  F | IPC A  B  F

Claim 0:
1. A filter cartridge for a vacuum cleaner comprising first and second opposite end walls, a side wall or walls which extend between the end walls so as to define an enclosure which surrounds a filter interior, wherein one or more of the walls comprises filter membrane material, the cartridge having an opening provided through a first end wall for receiving air entrained detritus into the interior, the opening being defined by a rigid support structure which spans and supports the first end wall of the cartridge, wherein structural reinforcement of one or more of the side wall or walls, and/or second end wall, is provided so that the enclosure is self-supporting but collapsible, so that the cartridge may adopt an erect use configuration, and in a collapsed configuration the side wall or walls and second end are drawn together onto the rigid support structure of the first end so as to be flat-packed.