초록 ▼

An apparatus for developing an electrostatic latent image formed on a charge retaining member is provided. The apparatus includes a magnetic conveyor having a magnet roller and a non-magnetic sleeve and applies a magnetic two-component developer comprising a toner and a magnetic carrier to the laten

An apparatus for developing an electrostatic latent image formed on a charge retaining member is provided. The apparatus includes a magnetic conveyor having a magnet roller and a non-magnetic sleeve and applies a magnetic two-component developer comprising a toner and a magnetic carrier to the latent image while it conveys the developer, thus forming a toner image. A tuft of developer carried by the non-magnetic sleeve is brought into contact with a thin uniform layer of toner formed on a toner supply roller to cause the toner to be transferred into the developer under the action of a magnetic or an electrostatic attraction.

대표청구항 ▼

An apparatus for developing an electrostatic latent image formed on a charge retaining member and including magnetic conveying means having a magnet roller and a non-magnetic sleeve, the magnetic conveying means applying a magnetic two-component developer including a toner and a magnetic carrier to

An apparatus for developing an electrostatic latent image formed on a charge retaining member and including magnetic conveying means having a magnet roller and a non-magnetic sleeve, the magnetic conveying means applying a magnetic two-component developer including a toner and a magnetic carrier to the latent image to form a toner image by conveying the developer to the latent image; characterized in that developer is adapted to be retained on the non-magnetic sleeve against removal under a magnetic influence of the magnet roller and is conveyed by a rotation of either the magnet roller or the non-magnetic sleeve or both while maintaining a turt thereof; further comprising a toner hopper for containing the toner and having a bottom opening; a toner supply roller rotatably disposed and located opposite to the bottom opening of the hopper and the non-magnetic sleeve; means for creating an electrical field between said supply roller and said sleeve; and means for forming a thin uniform layer of toner on the surface of the toner supply roller while electrically charging the toner, the tuft of the conveyed developer being brought into contact with the thin uniform toner layer on the toner supply roller to transfer only the electrically charged toner into the developer, whereupon the developer and the toner are mixed and agitated together on the non-magnetic sleeve.