Coating apparatus – With means to apply electrical and/or radiant energy to work... – With electromagnetic and/or electrostatic removal of...
Patent
1989-04-25
1991-05-21
Pendegrass, Joan H.
Coating apparatus
With means to apply electrical and/or radiant energy to work...
With electromagnetic and/or electrostatic removal of...
355259, C03G 1506
Patent
active
050165607
ABSTRACT:
A developing device for developing an electrostatic latent image formed on an image carrier includes a roller which carries toner particles to the developing position and a porous foam member of a material such as urethane resin which contacts the roller. The porous foam member comes in contact with either a developing roller or a toner supply roller which supplies toner particles to the developing roller. Toner particles supported in the holes of the porous foam member are charged as the particles rub against the developing roller or toner supply roller, causing the particles to be readily transferred to the roller. The porous foam member causes the amount of toner particles supported on the surface of the developing roller or the toner-supply roller to be sufficient to prevent a reduction in the density of the toner image even directly after a larger amount of toner particles are consumed for developing a solid toner region for example.
REFERENCES:
patent: 4244322 (1981-01-01), Nomura et al.
patent: 4696255 (1987-09-01), Yano et al.
patent: 4745429 (1988-05-01), Mukai et al.
patent: 4760422 (1988-07-01), Seimiya et al.
Ando Koichi
Asada Tomoyuki
Nishida Kaoru
Shimono Mamoru
Shinohara Hideyuki
Kabushiki Kaisha Toshiba
Pendegrass Joan H.
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