Apparatus for controlling toner concentration in electrophotographic copying machines
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United States of America Patent
Stats
-
Feb 3, 1981
Grant Date -
N/A
app pub date -
Jan 5, 1979
filing date -
Jan 17, 1978
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An apparatus for controlling the toner concentration in electrophotographic copying machines produces a toner concentration signal in response to the density of a reference patch image formed on a moving electrophotosensitive medium. The patch image density is detected at a time corresponding to a predetermined extent of movement of the electrophotosensitive medium following receipt of a signal indicating scanning of the original to be copied.
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Cited Art Landscape
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