MINIMUM TOLERANCE TRANSFER BAFFLE
Original Publication Date: 1995-Oct-31
Included in the Prior Art Database: 2004-Apr-07
Xerox Disclosure Journal
A significant problem on some copiedprinters is transfer deletions. This problem is a result of small air gaps between the paper and the photoreceptor. One method of minimizing these gaps is to use the paper stiffness to press the paper flat against the photoreceptor by causing the paper to bend as it contacts the photoreceptor and then applying an electrostatic tacking force while the paper and photoreceptor are in intimate contact. This is typically achieved by guiding the paper to the photoreceptor at a steep angle through the judicious use of paper baffles. A major difficulty with this approach is caused by the tolerances that build up between the paper baflle and the photoreceptor resulting in inadequate control of the paper contact point and/or bending radius, and consequent normal force, at contact. This difficulty is removed by employing a short paper guide that is attached to the photoreceptor module allowing for minimum tolerance accumulation and adjustment by a technician, if necessary. The paper guide has a horn shaped entry point that would overlap the pretransfer paper baffle absorbing any tolerances at that point where they would not impact performance. The baMe assembly could be hinged at the inboard end of a belt module and unlatch at the outboard end to swing clear allowing photoreceptor replacement. This device enables a set up procedure at both the outboard and inboard ends of the baffle when the belt module drawer, including the short baffle, is pulled out should adjustment or replacement of parts become necessary.