Molded developing magnet roller

Details Molded developing magnet roller Molded developing magnet roller

1995-01-27

1996-10-29

Ramirez, Nestor R.

Photocopying

Contact printing

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118657, 264108, 264DIG58, G03G 1506

Patent

active

055701671

ABSTRACT:
A hollow, member which serves as a cylinder having an inner configuration which matches the outer configuration of a magnet roller to be manufactured, is mounted in a metallic mold, and then the metallic mold is clamped. A molten resin containing magnetic particles is injected into the mold cavity of hollow member through a runner. Magnetic lines of force are applied to a roller type resin magnet, and such an application is continued. Before the roller type magnetic resin is fully cured, the mold is opened. Then, the magnetic members of a movable mold member 1 are separated from the magnetic members of a stationary mold member so that the distribution of the magnetic flux passing through the hollow member is changed. When the roller type resin magnet is fully cured by cooling, a magnet roller having two pairs of magnetic poles with different surface magnetic flux densities can be obtained.

REFERENCES:
patent: 4557582 (1985-12-01), Kan et al.
patent: 4604042 (1986-08-01), Tanigawa et al.
patent: 4954800 (1990-09-01), Ohtsuka
patent: 5145614 (1992-09-01), Kuroda
patent: 5181971 (1993-01-01), Ohtsuka
patent: 5359397 (1994-10-01), Yamaji

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