Aperture control member having a plurality of apertures passing toner under control of a plurality of control electrodes

Year	Description
1995	Invention patented by Shigeru Kagayama on May 1st, 1995. Abstract: Control electrodes of an aperture electrode member have no portions arranged upstream of apertures in the direction of transportation of the toner particles. Consequently, when a voltage is applied to the control electrodes, toner particles do not adhere upstream of the control electrodes. As no adhering toner particles appear upstream of the apertures in the toner transportation direction, even if the application of the voltage to the control electrodes is interrupted, the problem of excessive toner particles being jetted from openings of the apertures does not occur. Consequently, the production of a shadow or abnormal dots on an image recording medium is prevented.
Source: selected by the editor from original sources.

Invention: Aperture control member having a plurality of apertures passing toner under control of a plurality of control electrodes