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AssigneeUchiyama Manufacturing Corp.
InventorYoshihiko Yamaguchi
Estimating the term…
An unvulcanized raw rubber is provided, to which magnetic ferrite powder is added. A resulting mixture composed of the unvulcanized raw rubber and magnetic ferrite powder is passed through a rolling machine or an extruding machine such that the mixture is formed into a sheet blank that contains the magnetic ferrite powder aligned regularly in a particular orientation. Alternatively, the resulting mixture may be first passed through an extruding machine and then through a rolling machine. The sheet blank is then stamped across a planar direction such that a ring-like sheet is formed. The ring-like sheet, along with a supplemental ring, is placed inside a metal mold, where the ring-like sheet and supplemental ring are compressed in an axial direction, while applying heat thereto, so that the ring-like sheet is vulcanized and joined to the supplemental ring. Finally, the vulcanized ring-like sheet is magnetized so that S poles and N poles appear alternately around its circumference.
A method for manufacturing a magnetic encoder for use with a sensor on a semiconductor chip that is placed opposite the magnetic encoder, and for producing codes as represented by a sequence of pulses generated by magnetic forces, said method comprising:
A method for manufacturing a magnetic encoder for use with a sensor on a semiconductor chip that is placed opposite the magnetic encoder, for use in applications that require analog output, and for producing codes as represented by a sequence of pulses generated by magnetic forces, said method comprising:
Dependencies are inferred from the claim text.