Electrostatic recording head with a plurality of linear electrod

Details Electrostatic recording head with a plurality of linear electrod Electrostatic recording head with a plurality of linear electrod

1994-06-06

1996-05-07

Wong, Peter S.

Incremental printing of symbolic information

Electric marking apparatus or processes

Electrostatic

G01D 1506

Patent

active

055150950

ABSTRACT:
An electrostatic recording head used for forming an electrostatic latent image of an image to be recorded on a recording medium comprises a plurality of electrode groups, each group including a plurality of needle-like electrodes. The needle-like electrodes of all the groups are arranged linearly in at least one line. A plurality of auxiliary electrodes are disposed such that each of the electrode groups faces at least one of the auxiliary electrodes. An auxiliary electrode driving unit drives the auxiliary electrodes independently of each other. Each of the electrode groups is divided into a plurality of subgroups, each subgroup including at least one of the needle-like electrodes. A subgroup driving unit is provided for each of the subgroups for driving the subgroups independently of each other. A control circuit controls the subgroup driving unit and the auxiliary electrode driving unit so that the subgroups belonging to one of the electrode groups are driven in such an order that a plurality of subgroups which are not adjacent to each other are simultaneously driven, while at least one of the auxiliary electrodes facing the one electrode group is driven during at least a time interval when any one of the subgroups is driven.

REFERENCES:
patent: 4157533 (1979-06-01), Diddens
patent: 4258373 (1981-03-01), Arnoldi et al.
patent: 5053793 (1991-10-01), White et al.

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