Incremental printing of symbolic information – Ink jet – Ejector mechanism
Patent
1994-12-02
1996-04-16
Wong, Peter S.
Incremental printing of symbolic information
Ink jet
Ejector mechanism
B41J 206
Patent
active
055087230
ABSTRACT:
An image forming apparatus includes a back electrode roller which is rotatably disposed on the upper side of an aperture electrode member. A toner carrier roller is disposed on the lower side of the aperture electrode member. The aperture electrode member is constructed such that a plurality of apertures are defined in a row in an insulating sheet and each of a plurality of control electrodes is formed on the upper side of each aperture. A control voltage applying circuit applies a voltage of 0 V or -100 V to each of the control electrodes based on an image signal. A DC power source is electrically connected to the back electrode roller. Toner particles on the toner carrier roller fly under the action of an electric field formed by the back electrode roller. A voltage of -100 V applied to each of the control electrodes prevents the toner particles from flying when no image pixels are to be formed. The voltages are applied to the control electrodes of the aperture electrode members such that an electric field is formed which prevents the charged toner particles from being deposited on the control electrodes. Thus, a higher quality image is formed on a support member.
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Brother Kogyo Kabushiki Kaisha
Gibson Randy W.
Wong Peter S.
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