Electrostatic latent image forming apparatus controlling the dir

Details Electrostatic latent image forming apparatus controlling the dir Electrostatic latent image forming apparatus controlling the dir

1989-08-02

1990-09-11

Grimley, A. T.

Photocopying

Contact printing

Light boxes

346159, 355219, G03G 1500, G03G 1502

Patent

active

049566709

ABSTRACT:
In an electrostatic latent image forming apparatus used in a printer, a facsimile machine or the like, there is added an insulating member between the conventional screen electrode and the latent image bearing body to allow the derived-ion beam to be squeezed down and the separation from the latent image bearing body to be reduced without the danger of a damaging discharge toward that body. The control area provided in apertures of the additional insulating member enables control of the direction of the derived ions so that the squeezing yields improved resolution and efficiency for high-density recording. The position of the additional insulating member is sufficient to inhibit damaging discharge, even when the screen electrode and latent image bearing body are very close to each other.

REFERENCES:
patent: 4160257 (1979-07-01), Carrish
patent: 4585323 (1986-04-01), Ewing et al.
patent: 4653895 (1987-03-01), Deguchi et al.
patent: 4658275 (1987-04-01), Fujii et al.
patent: 4682880 (1987-07-01), Fujii et al.

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