Abrading – Abrading process – Tumbling
Reexamination Certificate
2000-06-16
2001-05-15
Banks, Derris H. (Department: 3723)
Abrading
Abrading process
Tumbling
C451S326000, C451S327000
Reexamination Certificate
active
06231426
ABSTRACT:
FIELD OF THE INVENTION
The present invention relates generally to a polishing machine, and more particularly to a magnetic polishing machine.
BACKGROUND OF THE INVENTION
The U.S. Pat. Nos. 5,662,516 and 5,044,128 disclose a polishing machine comprising a polishing tub in which a plurality of magnetic media are activated by a magnetic field effect to bring about the rubbing of work pieces so as to make them bright and lustrous.
Such prior art polishing machines as described above are defective in design in that the magnetic media are apt to be attracted to the surface of a workpiece. The removal of the magnetic media from the surface of a polished work piece is a costly operation, which is often done by an expensive peripheral equipment. It is conceivable that an extra floor space must be allocated for disposition of the peripheral equipment.
SUMMARY OF THE INVENTION
The primary objective of the present invention is to provide a magnetic polishing machine which is free from the drawbacks of the prior art polishing machines described above.
In keeping with the principle of the present invention, the foregoing objective of the present invention is achieved by the magnetic polishing machine comprising a housing in which a polishing tub, a separation tub, an alternating magnetic field generator, and a homomagnetic field generator are disposed such that the polishing tub is corresponding in location to the alternating magnetic field generator, and that the separation tub is corresponding in location to the homomagnetic field generator. The polishing tub contains a plurality of magnetic polishing media, which are induced by the homomagnetic field effect to move in one direction to polish the surface of a workpiece by rubbing. The process of removing the cohered magnetic media from the surface of the workpiece is carried out in the separation tub.
REFERENCES:
patent: 5044128 (1991-09-01), Nakanko
patent: 5662516 (1997-09-01), You
patent: 6146243 (2000-11-01), Imahashi
Banks Derris H.
Browdy and Neimark
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