Raster image processor for all points addressable printer
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United States of America Patent
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-
Aug 17, 1993
Grant Date -
N/A
app pub date -
Jul 5, 1990
filing date -
Jul 5, 1990
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A raster image processor for an all points addressable printer includes at least three digital computer controlled processing units arranged in a parallel processing pipe line. The first unit is a master processing unit that receives printing instructions and generates rendering commands. The record unit is connected to the first unit by a dedicated bus, and receives the rendering commands over the bus and generates bit maps corresponding to the rendering commands. The third unit is a memory unit connected to the second unit by a second dedicated bus, and receives the bit maps from the second unit and stores them in a page memory. All three units are connected by a communications and control bus for overall coordination of the units.
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