A sheet feeding system in which the idler roller shafts are loosely mounted
between opposing side walls of a slot for limited movement relative to
their mating sheet feeding rollers, and spring biased theretowards to
provide sheet feeding nips with the desired normal force, wherein the
spring biasing is nonsymmetrical to additionally provide an orthogonal
spring biasing of the idler shafts towards only one of the side walls of
their mounting slots. This nonsymmetrical spring biasing may be provided
by a torsion spring with a central coil wrapped around the idler shaft and
extending legs anchored in nonsymmetrical anchoring positions and/or with
nonsymmetrically shaped legs.
