Browse Prior Art Database

LONG LIFE DRIVE COUPLING WITH MOTION QUALITY ENHANCEMENT

IP.com Disclosure Number: IPCOM000027079D
Original Publication Date: 1995-Feb-28
Included in the Prior Art Database: 2004-Apr-07
Document File: 2 page(s) / 112K

Publishing Venue

Xerox Disclosure Journal

Abstract

Proposed is an polygon drive coupling that facilitates a smooth motion profile for application in tri-level xerography. Tri-level xerography is more sensitive to motion quality defects than conventional xerography. This is especially true for the color portion of an image where motion quality is defined by photoreceptor speed variations and structural vibrations at the ROS. A ty ical motion quality specification may be equal to approximately 0.25% o P the velocity variation at the photoreceptor surface.

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XEROX DISCLOSURE JOURNAL

LONG LIFE DRIVE COUPLING WITH MOTION QUALITY U.S. C1.403/311 ENHANCEMENT Int. C1. F16B 02/02 Michael J. Martin
Richard R. Getz
Douglas G. Berner
Andrew N. Babish

Proposed Classification

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XEROX DISCLOSURE JOURNAL - Vol. 20, No. 1 january/February 1995 111

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LONG LIFE DRIVE COUPLING WITH MOTION QUALITY ENHANCEMENT (Cont'd)

Proposed is an polygon drive coupling that facilitates a smooth motion profile for application in tri-level xerography. Tri-level xerography is more sensitive to motion quality defects than conventional xerography. This is especially true for the color portion of an image where motion quality is defined by photoreceptor speed variations and structural vibrations at the ROS. A ty ical motion quality specification may be equal to approximately 0.25% o

                   P the
velocity variation at the photoreceptor surface.

A source of excessive ROS vibration is drive coupling chatter. Chatter is the result of how two halves of a drive coupling move relative to each other while the entire coupling is rotated through a line of force. With increased misalignment between the drive coupling halves, vibration due to chatter tends to increase. Therefore, one design criteria for an ideal coupling geometry is one in which the coupling is insensitive to coupling alignment.

Another criteria guiding the design of a coupling is that of reliability. A typical Unit Maintenance Reliability (UMR) target for an entire drives system on a typical high volume color printer is 0.28 per million prints. Thus, the failure rate for developer drive couplings must be very low so that the total system meets t...