Method of producing a corrugated board as well as a corrugated board
First Claim
1. A corrugated board used for folding cases or for sheet materials for protecting electrostatically endangered articles against electrostatic discharges and electric fields, comprisinga corrugated layer,a flat layer on one side of said corrugated core layer,a shielding layer (4) positioned between said corrugated core layer and said flat layer, said shielding layer having shielding material is selected from the group consisting of carbon, graphite and mixtures thereof, said shielding layer having a plurality of interspaces (90), andsaid corrugated layer is bonded or glued to said flat layer at at least some of said interspaces.
1 Assignment
0 Petitions
Accused Products
Abstract
In the case of a method of producing a corrugated board for protecting electrostatically endangered articles 10 against electrostatic: discharges and electric fields, at least one corrugated layer 1 and at least one flat layer 2, 3 are glued together, a shield means 4, which contains carbon and/or graphite, being applied, prior to the glueing of said layers 2, 3, to the surface 40, 50, 60 of at least one layer which will be located in the interior of the corrugated board structure. This shield means 4 is applied as a layer, which comprises interconnected layer components 80 and intermediate interspaces 90 occupying a certain area, before the layers 1, 2, 3 are glued together in the area of said interspaces 90. The interspaces 90 are either completely free or covered by thinner layer components 90'"'"'occupying a certain area and constituting part of the shield means 4. In the corrugated board W, which is produced in accordance with this method, the layers 1, 2, 3 including the shield means 4 between them are glued together preferably in the area of the interspaces 90, if necessary through the thinner layer components 90'"'"'.
22 Citations
31 Claims
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1. A corrugated board used for folding cases or for sheet materials for protecting electrostatically endangered articles against electrostatic discharges and electric fields, comprising
a corrugated layer, a flat layer on one side of said corrugated core layer, a shielding layer (4) positioned between said corrugated core layer and said flat layer, said shielding layer having shielding material is selected from the group consisting of carbon, graphite and mixtures thereof, said shielding layer having a plurality of interspaces (90), and said corrugated layer is bonded or glued to said flat layer at at least some of said interspaces.
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24. A method of producing a corrugated board consisting of paperboard or paper material and used for cases or for sheet materials for protecting electrostatically endangered articles against electrostatic discharges and electric fields, comprising
providing at least one corrugated layer; -
applying a shielding layer to at least one surface of a flat layer, said shielding layer having shielding material selected from the group consisting of carbon, graphite and mixtures thereof; applying said shielding layer to said flat layer to provide a said shielding layer with a plurality of intermediate interspaces (90), and gluing the flat layer to said corrugated layer at at least some of said interspaces. - View Dependent Claims (25, 26, 27, 28, 29, 30, 31)
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Specification