Gravure engraving system using two signals out of phase with eac

Details Gravure engraving system using two signals out of phase with eac Gravure engraving system using two signals out of phase with eac

1996-01-16

1998-11-03

Frahm, Eric

Facsimile and static presentation processing

Facsimile

Recording apparatus

B41C 104

Patent

active

058317457

ABSTRACT:
An adding portion superposes a density signal (a signal having its level changing in accordance with a density of a printed image) from a density signal generator with a carrier signal (a signal in the form of a sine wave having a prescribed frequency and a prescribed amplitude) from a carrier signal generator to generate an engraving signal. A stylus included in an engraving head 21 reciprocates according to the applied engraving signal to engrave cells on a gravure cylinder rotating in the main scanning direction. A sub-scanning motor moves the engraving head in a sub-scanning direction perpendicular to the main scanning direction every time cells for one line in the main scanning direction of the gravure cylinder have been engraved. The movement of the engraving head 21 in the sub-scanning direction is controlled so that cells adjacent in the sub-scanning direction partially overlap with each other in every other line.

REFERENCES:
patent: 3770888 (1973-11-01), de Vos et al.
patent: 4012584 (1977-03-01), Gascoigne
patent: 4057838 (1977-11-01), Doelves et al.
patent: 4451856 (1984-05-01), Buechler
patent: 5029011 (1991-07-01), Fraser
patent: 5416597 (1995-05-01), Mubaslat
patent: 5438422 (1995-08-01), Holowko et al.
patent: 5440398 (1995-08-01), Holowko et al.

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