Method of and a circuit for metering ink in printing machines
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United States of America Patent
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Jan 30, 1990
Grant Date -
N/A
app pub date -
Jun 30, 1988
filing date -
Jul 1, 1987
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A stepper drive for an ink doctor roller of a rotary printing machine is power supplied by incremental voltages of uniform magnitude derived from the rotary speed of the machine. The magnitude of an ink metering step of the doctor roller is selected in an evaluation unit which determines the number of incremental voltages supplied to the stepper drive. At the same time, the rate of the selected metering steps is selected in dependency on the rotary speed of the machine by a rate selection means.
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