Abrading – Machine – Tumbling device
Reexamination Certificate
2000-10-05
2001-08-07
Banks, Derris H. (Department: 3723)
Abrading
Machine
Tumbling device
C451S327000, C451S328000
Reexamination Certificate
active
06270398
ABSTRACT:
FIELD OF THE INVENTION
The present invention relates generally to a polishing machine, and more particularly to a vibrational magnetic polishing machine for smoothing the surface of a workpiece.
BACKGROUND OF THE INVENTION
The conventional polishing machine is generally formed of a workpiece container and an actuation device. As the workpiece container is actuated by the actuation device, the polishing stones contained in the workpiece container are actuated to rub the surface of a workpiece contained in the workpiece container. Certain conventional polishing machines are provided with a plurality of magnetic media in place of the polishing stones. The magnetic media are caused by the magnetic field effect to travel randomly at a high speed to rub the surface of a workpiece.
Such conventional polishing machines as described above are defective in design in that the surface of the workpiece is susceptible to damage caused by friction of the fast-moving polishing stones or magnetic media, and that the smoothing effect of the polishing stones or magnetic media depends on the intensity of collision as well as the speed at which the polishing media travel, and further that the comer surface of the workpiece is often poorly smoothed.
SUMMARY OF THE INVENTION
The primary objective of the present invention is to provide a vibrational magnetic polishing machine which is free from the deficiencies of the conventional polishing machines described above.
The vibrational magnetic polishing machine of the present invention comprises a container, a plurality of magnetic polishing media, an action device, and a rotary alternating magnetic field generator. The workpiece and the polishing media are held in the container, which is vibrated by the action device to cause the workpiece and the polishing media to jump. The magnetic polishing media are induced by the rotary alternating magnetic field to move to rub the surface of the workpiece.
REFERENCES:
patent: 5237778 (1993-08-01), Baer
patent: 5375377 (1994-12-01), Kenton
patent: 5476415 (1995-12-01), Nishimura et al.
patent: 5611725 (1997-03-01), Imahashi
patent: 5662516 (1997-09-01), You
patent: 5733172 (1998-03-01), Nishimura et al.
patent: 6146243 (2000-11-01), Imahashi
Banks Derris H.
Browdy and Neimark
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