Color printer with improved image registration

Details Color printer with improved image registration Color printer with improved image registration

1991-07-22

1992-12-29

Pendegrass, Joan H.

Recorders

Printing, dotting, or punching marker

Ink transfer support or moving means

346157, 355327, G01D 1514

Patent

active

051755645

ABSTRACT:
A color printer includes a recording element which is advanced along a path to receive color-separation images of a desired multicolor image to be printed. Color-separation image recording is effected by a laser scanner which operates asynchronously with respect to the movement of the recording element and functions to periodically scan an intensity-modulated beam of radiation across the moving recording element to record a multitude of equally spaced image lines that collectively define a two-dimensional latent image. In response to a print enable signal, the laser scanner begins scanning the first line of a color-separation image at any time within a line-time interval required to scan each image line. According to a preferred embodiment of the invention, the print enable signal is provided a predetermined fraction of the line-time interval earlier for the second and subsequent color-separation images of a desired multicolor image than it is for the first color-separation image. In this manner the color-separated images are better registered with respect to a nominal position on the recording element.

REFERENCES:
patent: 4819025 (1989-04-01), Takahashi et al.
patent: 4831412 (1989-05-01), Ohnishi et al.
patent: 4884106 (1989-11-01), Harris
patent: 4893135 (1990-01-01), Jamzadel
patent: 4975741 (1990-12-01), Tanaka
patent: 5040026 (1991-08-01), Jamzadeh et al.
patent: 5049897 (1991-09-01), Ng

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