Compositions – Magnetic – With wax – bitumen – resin – or gum
Reexamination Certificate
2005-01-04
2005-01-04
Sheehan, John P (Department: 1742)
Compositions
Magnetic
With wax, bitumen, resin, or gum
C252S062550, C148S302000, C075S255000, C428S600000, C428S606000, C428S687000
Reexamination Certificate
active
06838014
ABSTRACT:
Disclosed herein is a cooling roll which can provide bonded a magnet having excellent magnetic properties and having excellent reliability. A melt spinning apparatus is provided with a tube2having a nozzle3at the bottom thereof, a coil4for heating the tube and cooling roll5having a circumferential surface53in which dimple correcting means is provided. A melt spun ribbon8is formed by injecting the molten alloy6from the nozzle3so as to be collided with the circumferential surface53of the cooling roll5in an inert gas atmosphere (ambient gas) such as helium gas, so that the molten alloy6is cooled and then solidified. In this process, dimples to be produced on a roll contact surface of the melt spun ribbon are divided by the dimple correcting means, thereby preventing formation of huge dimples.
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Patent Application entitled, “Magnetic Material Manufacturing Method, Ribbon-Shaped Magnetic Materials, Powdered Magnetic Materials and Bonded Magnets”.
Arai Akira
Kato Hiroshi
Harness & Dickey & Pierce P.L.C.
Sheehan John P
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