Process for printing on a surface of an object utilizing a speci

Details Process for printing on a surface of an object utilizing a speci Process for printing on a surface of an object utilizing a speci

1992-10-23

1995-07-11

Beatty, Robert B.

Incremental printing of symbolic information

Electric marking apparatus or processes

Electrostatic

430114, H04N 129

Patent

active

054325366

ABSTRACT:
Dots for producing a multiple tone electrostatic latent image are formed by selectively discharging a charged surface with a scanned laser beam. The multiple tones are produced by pulse width modulation of the laser beam according to the tones required in the dots. High resolution is maintained by limiting the diameter of toner particles to 1/5 to 5 times a minimum exposed dot dimension of less than 1 micron. A laser beam exposure device includes a galvanometer mirror from which the scanning laser beam is reflected. The galvanometer mirror is tilted in synchronism with the conveying direction of the surface being scanned in order to maintain focus of the laser beam on the surface.

REFERENCES:
patent: 4826747 (1989-05-01), Chiba et al.
patent: 5124802 (1992-06-01), Ito et al.

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