Filter bag and method for the production thereof
AssigneeEurofilters N.V.
InventorJan Schultink
Life of this patent
Estimating the term…
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.
Claims25
A filter bag for a vacuum cleaner, comprising:
- a substantially tubular bag made from a bag material having at least one non woven composite layer, the bag having a closed free end area and an at least partially closed area opposite the closed free end area;
- and
- a retaining plate, wherein edges of the bag are at least partially interconnected by a weld seam to form the at least partially closed area, and wherein a bottom of the bag is formed by folding plies of the bag material to lie one above another and at least partially interconnecting the plies of the bag material,
- wherein the plies are interconnected by welding, and
- wherein a pre-crease is introduced into the bag material substantially parallel to the weld seam in the bottom.
Dependencies are inferred from the claim text.