Recorders – Printing – dotting – or punching marker – Ink transfer support or moving means
Patent
1987-12-31
1989-05-30
Goldberg, E. A.
Recorders
Printing, dotting, or punching marker
Ink transfer support or moving means
358296, G01D 942
Patent
active
048355518
ABSTRACT:
A reproduction apparatus includes a plurality of recording elements, for exampl, LED's, arranged in a row along the length of the printhead. An image scanner scans an original document sheet to generate data signals related to the information on the sheet. In rasterizing the data for reproduction by the printhead upon a photoreceptor, means are provided for locating a pictorial portion on the document sheet which will require screening during the reproduction process. Image information comprising text and charts not in the area determined to include the pictorial information is reproduced at a resolution of N.times.M dots per square inch. Image information including text, etc., in the area determined to include the pictorial information is reproduced at N.times.(L.times.M) dots per square inch. The apparatus also includes means for providing additional emissions of the light emitting diodes, in response to photoreceptor travel, for correcting for nonuniformities in emissions of the LED's. Respective strobe pulses for enabling the LED's are selected in accordance with the type of exposure.
REFERENCES:
patent: 4367533 (1983-01-01), Wiener
patent: 4408868 (1983-10-01), Thomas et al.
patent: 4521814 (1985-06-01), Ono et al.
patent: 4549222 (1985-10-01), Fogaroli
patent: 4621271 (1986-11-01), Brownstein
patent: 4623242 (1986-11-01), Hayashi et al.
patent: 4689694 (1987-08-01), Yoshida
T. Nishimura et al., Electrophotographic Color Printing Using Elliptical Laser Beam Scanning Method, Journal of Imaging Technology, vol. 12, No. 6, 1986, pp. 329-333.
N. Kawamura et al., Half-Tone Reproduction on Digital Color Printers Based on Electrophotography, Electrophotography 24(3), pp. 2-11 (1985).
Eastman Kodak Company
Goldberg E. A.
Reinhart Mark
Rushefsky Norman
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