Covering for paper machine
OwnerFrank Bez, Petra Hack-Ueberall +3inventors
InventorsFrank Bez, Petra Hack-Ueberall, Matthias Hoehsl, Matthias Schmitt, Michael Straub
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Abstract
A covering for use with a paper, cardboard, tissue or fibrous web making machine, the covering including a plurality of films laminated together, the films including a polymer material. The plurality of films each having a plurality of perforations penetrating a thickness of each film. The perforations being configured to form drainage channels through the covering. At least one of the films having perforations had filler particulates distributed through the polymer material of the film. The filler particulates having been substantially removed from the polymer material to form the perforations in the films.
Claims15
A covering for use with one of a paper, cardboard, tissue and fibrous web making machine, the covering comprising a plurality of films laminated together, said films including a polymer material, said plurality of films each having a plurality of perforations penetrating a thickness of each said film, said perforations being configured to form drainage channels through the covering, at least one of said films having said perforations having had filler particulates distributed through said polymer material of said at least one said film, said filler particulates having been substantially removed from said polymer material to form said perforations in said at least one of said films.
A method of producing a covering for use with one of a paper, cardboard, tissue and fibrous web making machine, the method comprising the steps of:
- admixing a filler particulate with a polymer material thereby forming a mixture;
- forming a plurality of films from said mixture;
- laminating said plurality of films together;
- and
- forming a plurality of perforations in each of said films by removing said filler particulate from said polymer material of each of said films, wherein said plurality of perforations in each of said films extends through a thickness of each of said films to form a plurality of drainage channels through said plurality of films.
Dependencies are inferred from the claim text.