Electricity: magnetically operated switches – magnets – and electr – Magnets and electromagnets – For magnetizing or demagnetizing
Reexamination Certificate
2005-02-08
2005-02-08
Barrera, Ramon M. (Department: 2832)
Electricity: magnetically operated switches, magnets, and electr
Magnets and electromagnets
For magnetizing or demagnetizing
Reexamination Certificate
active
06853280
ABSTRACT:
A method of magnetizing a magnetic sheet, said method able to magnetize a roll sheet conveniently at a high speed and stably including the steps of bringing a cylindrical permanent magnet having N-poles and S-poles multipolar-magnetized alternately along its circumference into contact with one surface of a long magnetic sticking sheet having an axis of easy magnetization oriented in a sheet longitudinal direction so that the sheet longitudinal direction is orthogonal to a shaft of the permanent magnet and multipolar-magnetizing the magnetic sticking sheet along the axis of easy magnetization by rotating the cylindrical permanent magnet due to the magnetic sticking sheet being rolled up, wherein the angle of contact of the magnetic sticking sheet fed to the cylindrical permanent magnet is made 45° or less, and a magnetization apparatus used for the method.
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Kawamata Kazuto
Matsumura Shinichi
Ohta Eiji
Sugawara Toshiaki
Barrera Ramon M.
Depke Robert J.
Holland & Knight LLP
Sony Corporation
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