Timing device for printing machines
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United States of America Patent
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Apr 28, 1987
Grant Date -
N/A
app pub date -
Jun 25, 1984
filing date -
Jun 23, 1983
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A timing device for controlling the operation of printing machines comprises: an encoder disc for generating pulses correspnding to angular increments during one rotation of the machine; at least one encoder disc for generating a singular synchronizing or reference signal; address generating means including a counter reset by the singular synchronizing pulse and counting the angular increments to continuously produce a bindary coded address at its outputs; a second counter coupled to the encoder of angular increments via an AND-gate controlled by a monostable multivibrator to produce at its outputs a binary coded address corresponding to the rotary speed of the printing machine. The addresses from respective counters are fed via corresponding data buses to address inputs of a programmable read only memory. From the outputs of the PROM timing output signals are read out as a function of the angular position of the machine or the function of the angular position and of the rotary speed of the machine.
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