Patent ID: 6556798
Filing Date: 2003-04-29
Classification: B65H,G03G

Abstract:
For use in an electrostatographic machine, an apparatus for frictionally moving member by another member, comprising:a movable first member having a first operational surface; a second member having a second operational surface for forming a pressure nip with said first operational surface of said first member, said second operational surface of said second member being movable with said first operational surface of said first member in said pressure nip, at least one of said first member and the second member including a conformable elastomeric layer which has a Poisson ratio in the range of 0.45 and 0.50, wherein at least one of said first operational surface and said second operational surface deforms in said pressure nip; a drive mechanism for moving one of said first member and said second member, said one of said first member and said second member thereby frictionally moving the other member in a nonslip condition of engagement; and a speed modifying device operatively associated with at least one of said first member and said second member in order to apply a force to change, to a predetermined difference, any difference in speeds between a speed of a first portion of said first operational surface and a speed of a second portion of said second operational surface, the first and second portions being situated away from said nip and located where any distortions caused by said pressure nip are negligible, said predetermined difference including zero.