Sheet body, information writing method, information reading method, and information reading apparatus
AssigneeFuji Xerox Co., Ltd.
InventorsYasunori Koda, Shoji Yamaguchi, Kunihiro Takahashi, Mario Fuse
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Abstract
A sheet body including plural magnetic wires arranged and embedded along a longitudinal direction of the sheet body at a predetermined interval, wherein each of the magnetic wires is formed by two kinds of magnetic bodies with different coercive forces into a linear shape of a predetermined length, and the magnetic wire column with stronger coercive force is magnetized, thereby preventing the magnetic wire column with weaker coercive force from generating a response signal to an alternating magnetic field.
Claims20
A sheet body comprising a plurality of magnetic wires arranged and embedded along a longitudinal direction of the sheet body at a predetermined interval,
- wherein each of the magnetic wires is formed by two kinds of magnetic bodies with different coercive forces into a linear shape of a predetermined length, and magnetized by a magnetic wire column with stronger coercive force, thereby preventing the magnetic wire column with weaker coercive force from generating a response signal to an alternating magnetic field.
A long sheet into which information is written comprising a plurality of magnetic wires embedded into the sheet and composed of magnetic wire rods and magnetic bands,
- wherein the magnetic wires are arranged such that the magnetic wires compose a plurality of wire columns, and the wire columns include the magnetic wires arranged along a longitudinal direction of the sheet at a predetermined interval.
A long sheet into which information is written comprising a plurality of wire columns embedded into the sheet and arranged along a longitudinal direction of the sheet,
- wherein the wire columns are composed of a plurality of magnetic wires arranged at a predetermined interval, and the magnetic wires are composed of magnetic wire rods and magnetic bands.
An information writing method of writing predetermined information into a sheet body into which wire columns where magnetic wires formed by two kinds of magnetic bodies with different coercive forces into a linear shape of a predetermined length are arranged at a predetermined interval are embedded, the writing method comprising:
- relatively moving a magnetizing portion for magnetizing the magnetic wire column with stronger coercive force of the two magnetic bodies along a column direction of the wire columns, and simultaneously magnetizing the magnetic wire column with stronger coercive force selectively based on the information to be written.
An information reading method of reading information from a sheet body, in which wire columns where magnetic wires formed by two kinds of different magnetic bodies with different coercive forces into a linear shape of a predetermined length are arranged at a predetermined interval are embedded, and into which the information is written by selectively magnetizing the magnetic wire column with stronger coercive force of the two magnetic bodies, the information reading method comprising:
- applying an alternating magnetic field to the magnetic wires, relatively moving a detecting section which can detect a response signal generated from the magnetic wire column with weaker coercive force with respect to the alternating magnetic field along a column direction of the wire columns, and simultaneously reading presence and non-presence on the response signal according to positions of the magnetic wires.
An information reading apparatus that sorts an object to which a sheet body, into which wire columns where magnetic wires formed by two kinds of magnetic bodies with different coercive forces into a linear shape of a predetermined length are arranged at a predetermined interval are embedded and information is written by selectively magnetizing the magnetic wire column with stronger coercive force of the two magnetic bodies, is attached based on information written into the sheet body, the information reading apparatus comprising:
- a transporting section that transports the object at a predetermined transporting speed;
- an exciting coil that is provided so as to be opposed to the wire columns of the sheet body attached to the object to be transported by the transporting section and applies an alternating magnetic field;
- a detecting section that detects a response signal when the magnetic wire column with weaker coercive force of the two magnetic bodies generates the response signal according to the alternating magnetic field applied by the exciting coil;
- and
- a determining section that determines information written into the sheet body according to presence and non-presence of the response signals from the magnetic wires of the wire columns.
Dependencies are inferred from the claim text.