Filter bag and method for the production thereof

Gas separation – Flexible or collapsible bag type – Valved – self-closing – or apparatus contained bag closing means

Reexamination Certificate

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Details

C055S369000, C055S381000, C055S382000, C055SDIG020, C015S347000, C156S062600, C156S260000, C156S266000, C156S554000

Reexamination Certificate

active

08002862

ABSTRACT:
Described is a filter bag for a vacuum cleaner which may include a tubular bag with a closed free end area and an opposed, at least partially closed area as well as with a retaining plate. The bag is made from a bag material having at least one non-woven layer, and the at least partially closed area is folded forming a bottomPlies of the bag material which lie the one above the other are formed in areas, and is at least partially closed by a weld seam extending centrally in the bottom, the plies of the bag material which lie the one above the other being at least partially connected to one another.

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