Perfecting press apparatus
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United States of America Patent
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Feb 17, 2004
Grant Date -
Sep 11, 2003
app pub date -
Mar 7, 2003
filing date -
Mar 8, 2002
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A perfecting press apparatus for forming images on both sides of a transfer medium. With respect to a transferring current Ipt of an image forming unit, current Ipc is made large which flows from a charge control instrument for controlling charge polarity of the toner on the transfer medium in the direction of the transfer medium. In particular, in the image forming unit causing retransfer, a de-charging light source is installed between the a developing device and a transferring device for canceling charges other than at a latent image part of an image carrier, so that the relationship between Ipt and Ipc is to be 3.times.Ipc.ltoreq.Ipc.ltoreq.6.times.Ipt, whereby the retransfer is suppressed to minimum for producing satisfied quality of image.
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