Vacuum cleaner filter bag
AssigneeEurofilters Holding N.V.
InventorsJan Schultink, Ralf Sauer
Life of this patent
Estimating the term…
Abstract
The invention relates to a vacuum cleaner filter bag having a composite material comprising a first layer consisting of a netting or a perforated sheet with an air permeability of at least 10,000 l/(m2 s), and a first fiber layer consisting of man-made fibers and/or vegetable fibers and connected to one side of the first layer.
Claims24
A vacuum cleaner filter bag having a composite material comprising:
- a first layer consisting of a netting with an air permeability of more than 10,000 l/(m2 s), the netting having a mesh opening of 2 mm to 30 mm and a thickness of 0.1 to 1.5 mm;
- and
- a first fibre layer consisting of man-made fibres or vegetable fibres or man-made fibres and vegetable fibres and connected to one side of the first layer.
A method of making a composite material for a vacuum cleaner filter bag, comprising the following steps:
- providing a first layer consisting of a netting with an air permeability of more than 10,000 l/(m2 s), the netting having a mesh opening of 2 mm to 30 mm and a thickness of 0.1 to 1.5 mm;
- providing, on one side of the first layer, a first fibre layer consisting of man-made fibres or vegetable fibres or man-made fibres and vegetable fibres, and
- connecting said first layer to said first fibre layer.
A method according to 16, wherein the connecting step is executed thermally by means of calendering, or by means of an adhesive.
Dependencies are inferred from the claim text.