c shaped opening the x and y plane location are illustrated in fig1 with respect to the illustrated and non limiting example of the present invention an anti rotation feature 20 may be located adjacent boss 12 for receiving seal 14 a boss 21 is also illustrated seal 14 thus may slide onto a shaft 30 see fig3 such as a toner adder roller shaft the seal 14 may therefore effectively seal to the shaft and may also provide a gasketing surface between the plate 10 and housing 40 an exemplary engagement of seal 14 to plate 10 is shown in sectional view in fig2 this view provides additional detail of the lip seal portion 22 which may engage the roller shaft while the cantilevered gasket seal 24 portion may engage the plate 10 the seal may include a relatively thicker lip seal portion 22 and relatively thinner wall section 25 in the lower tubular body which may allow for some misalignment between the seal 14 and roller shaft the flexible seal 14 may also add to the ability of the c shaped hole 42 fig4 to locate the gear plate 10 also illustrated in fig2 in sectional view is the anti rotation boss 20 for the seal 14 fig3 is a cross sectional view.