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US 2013/0036717 A1Published application
Vacuum Cleaner Filter Bag Having a Side Fold
AssigneeEurofilters Holding N.V.
InventorsRalf Sauer, Jan Schultink
Life of this patent
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Abstract
The invention comprises a vacuum cleaner filter bag having at least one side fold formed by two fold legs, wherein the vacuum cleaner filter bag is designed as a tubular bag, wherein, in a turned-in state, the at least one side fold has at least three edges, wherein two of the edges are formed by a respective weld seam, and wherein the side fold can be turned out with the edges formed by a weld seam.
Claims15
A vacuum cleaner filter bag with at least one side fold formed by two fold legs,
- wherein the vacuum cleaner filter bag comprises a tubular bag,
- wherein the at least one side fold comprises, in a turned-in state, at least three edges, two of the edges being formed by one weld seam each, and
- wherein the side fold can be turned out with the edges formed by a weld seam.
A method of manufacturing a vacuum cleaner filter bag with at least one side fold formed by two fold legs, comprising the steps of:
- providing a filter material layer,
- forming a tube from the filter material layer, comprising welding a straight weld,
- welding weld lines that will form edges of the at least one side fold,
- stamping out filter material for forming the edges of the at least one side fold;
- welding transverse weld seams for closing an upper and lower ends of the tube,
- turning in the at least one side fold;
- and
- separating off the vacuum cleaner filter bag in the region of the transverse weld seams.
5 more elements
Dependencies are inferred from the claim text.