Back to results
US 8,814,972 B2Granted
Multi-layered filter web
AssigneeMahle International GmbH
InventorHans Waibel
Life of this patent
Estimating the term…
Abstract
A multi-layered filter web having at least one at least one filter layer bonded to at least one additional filter layer. The filter layers are bonded together by at least one of ultrasonically and matted. The bonding is in at least one of at least one knurled edge region and in at least one matting region.
Claims11
A method for the manufacture of a filter, comprising:
- matting together at least two filter layers at least in some regions;
- knurling the at least two filter layers together at one edge of the two filter layers to form a knurled edge that is sealed;
- bonding together the at least two filter layers at the knurled edge by a first ultrasound;
- and
- attaching an adhesive bead along a side edge of the first of the at least two filter layers, the side edge being opposite to the knurled edge that is sealed;
- wherein the knurling and the bonding of the at least two filter layers occur in a single operation;
- and
- wherein the filter is wound into a form of a wound filter web and the adhesive bead secures the wound filter web in its final location.
5 more elements
A filter prepared by a process comprising:
- matting together at least two filter layers at least in some regions;
- knurling the at least two filter layers together at one edge of the two filter layers to form a knurled edge that is sealed;
- bonding together the at least two filter layers at the knurled edge by a first ultrasound;
- and
- attaching an adhesive bead along a side edge of the first of the at least two filter layers, the side edge being opposite to the knurled edge that is sealed;
- wherein the knurling and the bonding of the at least two filter layers occur in a single operation;
- and
- wherein the filter is in a form of a wound filter web and the bead secures the wound filter web in its final location.
5 more elements
A method for the manufacture of a filter, comprising:
- matting together at least two filter layers at least in some regions;
- knurling the at least two filter layers together at one edge of the two filter layers to form a knurled edge;
- bonding together the at least two filter layers at the knurled edge by a first ultrasound;
- and
- attaching a bead along a side edge of the first of the at least two filter layers, the side edge being opposite to the knurled edge that is sealed;
- wherein the knurling and the bonding of the at least two filter layers occur in a single operation;
- wherein the adhesive bead is on a side of the first of the at least two filter layers facing away from the second of the at least two filter layers, the filter is wound into the form of a wound filter, and the adhesive bead enables the filter to be securely wound to form the wound filter.
4 more elements
Dependencies are inferred from the claim text.