RATCHET DEFLECTION WHEEL
Original Publication Date: 1983-Jun-30
Included in the Prior Art Database: 2004-Apr-04
Xerox Disclosure Journal
In many automatic reproducing machines, the copy sheet with the transferred toner image is stripped from the photosensitive drum and passes a distance along a path from the drum past the bottom of the cleaner housing to the fuser where the toner image is fixed to the copy sheet. During this distance a buckle may form in the copy sheet and as the copy sheet passes under the cleaner housing a smear may result in the body of the copy at the point of contact of the copy sheet with the bottom of the cleaner housing. This may also result in toner being deposited on the bottom of the cleaner and subsequent copies may pick up the deposited cleaner. The figure illustrates a technique for preventing any buckle from touching the cleaner housing and causing the above-noted difficulties. A copy sheet 10 has a toner image transferred to it from drum 12 by transfer corotron 14 and the copy sheet is separated from the drum by detack corotron 16. The copy sheet is prevented from forming a buckle between the bottom of the cleaner housing 18 and the fuser 20 by placing a free wheeling ratchet type deflection wheel 22 at the top of the copy sheet path to kick the lead edge of a copy sheet down and thereby prevent the buckle from touching the bottom of the cleaner housing. With the ratchet design of the deflection wheel, the possibility of jams occurring due to the effect of the wheel protruding below the cleaner surface is eliminated.