Printing machine with toner density balance in solid areas and l

Details Printing machine with toner density balance in solid areas and l Printing machine with toner density balance in solid areas and l

1988-06-14

1990-10-30

Braun, Fred L.

Recorders

Printing, dotting, or punching marker

Ink transfer support or moving means

355214, 355246, 358300, G01D 1514, H04N 123

Patent

active

049672118

ABSTRACT:
A printing machine with control device for identifying solid areas to be imaged. The printing machine is regulated on a picture element (pel) basis to produce pels representing the interior of solid areas with an intensity sufficient to create a relatively large development vector and to produce non-solid area pels, such as the edges of solid areas, text, and line pels with an intensity sufficient to create a smaller development vector. In that manner, toner deposit densities are balanced for solid interiors, the edges of solids, test, and lines. A control method is provided for establishing the desired line stroke width, toner density, and exposure level for an electrophotographic printer, and thereafter establishing the exposure level needed to balance toner density in the solid areas with the line toner density.

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patent: 4403257 (1983-09-01), Hsieh
patent: 4437122 (1984-03-01), Walsh et al.
patent: 4460909 (1984-07-01), Bassetti et al.
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patent: 4482243 (1984-11-01), Suzuki et al.
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patent: 4544264 (1985-10-01), Bassetti et al.
patent: 4595956 (1986-06-01), Kawamura et al.
patent: 4625222 (1986-11-01), Bassetti et al.
patent: 4734734 (1988-03-01), Yano
patent: 4772919 (1988-09-01), Yoshiyama et al.

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