Toner carrier for developing device for electrostatic printing a

Details Toner carrier for developing device for electrostatic printing a Toner carrier for developing device for electrostatic printing a

1987-02-13

1989-05-09

Beck, Shrive

Coating apparatus

With means to apply electrical and/or radiant energy to work...

With electromagnetic and/or electrostatic removal of...

355259, 29130, 29132, G03G 1508

Patent

active

048278688

ABSTRACT:
A toner carrier in a mono-ingredient nonmagnetic developing device for an electrostatic printing machine which is a roller rotating in contact with a latent image carrier to carry toner on a surface of the latent image carrier, and to develop an electrostatic latent image formed on the latent image carrier with the toner. A toner carrier according to the first invention comprises a rotating shaft, an elastic layer surrounding the shaft, and a thin resin layer built up around the elastic layer or a thin resin cylinder provided with conductivity. A toner carrier according to the second invention comprises a conductive rotating shaft, an elastic layer surrounding the shaft, a thin cylinder surrounding the elastic layer and a toner carrying layer surrounding the cylinder, where the thin cylinder is conductive and the elastic layer is conductive or semi-conductive. And a toner carrier according to the third invention comprises a rotating shaft, an elastic layer surrounding the shaft, and a base consisting of a thin cylinder surrounding the elastic layer, where the elastic layer is made of compression molded soft urethane foam.

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patent: 4674439 (1987-06-01), Sakamoto et al.
patent: 4707382 (1987-11-01), Tajima et al.

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