Patent ID: 6253037
Filing Date: 2001-06-26
Classification: G03G

Abstract:
An apparatus for optimizing an image transfer environment in an electrophotographic system, comprising:a photosensitive drum for forming a visible image on a peripheral surface of the photosensitive drum;a transfer roller for transferring the visible image formed on the peripheral surface of the photosensitive drum onto a printing paper;a compress roller for fixing the visible image transferred onto the printing paper;at least one discharging part disposed on a printing path for the printing paper, for contacting with the printing paper on the printing path, and for discharging electrostatic electricity formed on the printing paper;a feeder roller made of a conductive material, for electrically detecting a leakage current corresponding to an amount of humidity contained in the printing paper and for feeding the printing paper between the transfer roller and the photosensitive drum;an idler roller positioned in facing relation to the feeder roller; anda ground controller for selectively controlling connecting and disconnecting of the at least one discharging part to a ground for discharging the electrostatic electricity formed on the printing paper according to the leakage current detected corresponding to the amount of humidity contained in the printing paper input from the feeder roller to the ground controller, the at least one discharging part comprising:a first discharging part comprising a first conductive contact part for contact with the printing paper on the printing path, a first ground terminal, and a first switch connected between the first conductive contact part and the first ground terminal, the first discharging part being disposed at a position on the printing path between a pickup roller for picking up the printing paper and the feeder roller;a second discharging part comprising a second conductive contact part for contact with the printing paper on the printing path, a second ground terminal, and a second switch connected between the second conductive contact part and the second ground terminal, the second discharging part being disposed at a position on the printing path between the feeder roller and the transfer roller; anda third discharging part comprising a third conductive contact part for contact with the printing paper on the printing path, a third ground terminal, and a third switch connected between the third conductive contact part and the third ground terminal, the third discharging part being disposed at a position on the printing path between the transfer roller and the compress roller, the compress roller being located on the printing path for fusing the visible image transferred onto the printing paper.