Abstract

A recording medium is provided, such as paper, secured by magnetic microwires. The recording medium comprises: a pulp structure formed by pulp fibers, said pulp structure carrying microwires having a metal core of a predetermined material composition, and an insulating layer coating on said metal core; and at least one coating layer on at least one side of said pulp structure. The pulp structure is a single-layer structure with the microwires fully embedded in said single layer, the microwires having cross-sectional dimensions approximately equal to cross-sectional dimensions of the pulp fibers.

IPC Classes  ?

• D21H 27/38 - Multi-ply at least one of the sheets having a fibrous composition differing from that of other sheets
• D21H 15/02 - Pulp or paper, comprising fibres or web-forming material characterised by features other than their chemical constitution characterised by configuration
• D21H 21/40 - Agents facilitating proof of genuineness or preventing fraudulent alteration, e.g. for security paper
• D21H 21/48 - Elements suited for physical verification, e.g. by irradiation
• D21H 23/24 - Addition to the formed paper during paper manufacture
• D21H 23/26 - Addition to the formed paper during paper manufacture by selecting point of addition or moisture content of the paper
• G08B 13/24 - Electrical actuation by interference with electromagnetic field distribution
• G11B 5/64 - Record carriers characterised by the selection of the material comprising only the magnetic material without bonding agent
• H01F 1/153 - Amorphous metallic alloys, e.g. glassy metals
• D21H 19/00 - Coated paperCoating material
• B41M 5/41 - Base layers

Abstract

A recording medium is provided, such as paper, secured by magnetic microwires. The recording medium comprises: a pulp structure formed by pulp fibers, said pulp structure carrying microwires having a metal core of a predetermined material composition, and an insulating layer coating on said metal core; and at least one coating layer on at least one side of said pulp structure. The pulp structure is a single-layer structure with the microwires fully embedded in said single layer, the microwires having cross-sectional dimensions approximately equal to cross-sectional dimensions of the pulp fibers.

IPC Classes  ?

• G11B 5/64 - Record carriers characterised by the selection of the material comprising only the magnetic material without bonding agent
• H01F 1/14 - Magnets or magnetic bodies characterised by the magnetic materials thereforSelection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials metals or alloys
• H01F 1/153 - Amorphous metallic alloys, e.g. glassy metals
• D21H 21/40 - Agents facilitating proof of genuineness or preventing fraudulent alteration, e.g. for security paper
• D21H 21/48 - Elements suited for physical verification, e.g. by irradiation
• D21H 23/24 - Addition to the formed paper during paper manufacture
• D21H 23/26 - Addition to the formed paper during paper manufacture by selecting point of addition or moisture content of the paper
• G08B 13/24 - Electrical actuation by interference with electromagnetic field distribution
• D21H 15/02 - Pulp or paper, comprising fibres or web-forming material characterised by features other than their chemical constitution characterised by configuration