Method of controlling electric charge of a two-component developing agent
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United States of America Patent
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-
Jan 12, 1999
Grant Date -
N/A
app pub date -
May 14, 1997
filing date -
May 14, 1996
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A toner and a carrier are so combined together as to substantially satisfy the following formula (1), ##EQU1## wherein Qmax is a maximum amount of electric charge (.mu.C/g) of the toner, V.sub.T/C is a contact potential difference (V) of the toner to the carrier, .tau.r is a relaxation time constant (sec) of the toner, .tau.g is a charging time constant (sec) of the toner, and k is a coefficient (F) determined depending upon the kinds of the toner and the carrier. This method makes it possible to so combine the toner and the carrier together that the amount of electric charge of the two-component developing agent becomes a maximum based on the contact potential difference (V.sub.T/C) of the toner to the carrier.
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