Sequentially moving individual developing units to developing location at which respective developing unit is switched between operative and inoperative positions
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United States of America Patent
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Sep 9, 1997
Grant Date -
N/A
app pub date -
Nov 13, 1995
filing date -
Nov 11, 1994
priority date (Note) -
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status (Latency Note)
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Abstract
A developing apparatus for developing an electrostatic latent image formed on a photoconductive member has a plurality of developer units supported by a rotatable supporting device, an elastic member such as a spring which rotates the supporting device through a predetermined angle to sequentially position the developer units in a developing position, and a switching device which switches the position among the developing units. The switching device has an accumulating device such as an electric motor which accumulates the energy in the elastic member, and a releasing device which releases the energy accumulated in the elastic member to effect the rotation of the supporting device and substantially instantaneous switching of the developer units.
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