Patent ID: 7305206

Claim:
A develop system, comprising: a developer housing having a sump containing developer material including toner particles; a developer member rotatably mounted in said housing for transferring toner particles to a latent image on a photoreceptive member in a development zone; a pickup auger, positioned in an auger channel, for transporting and delivering developer material to said developer member, along a path adjacent to said developer member said pickup auger having a first end portion and a second end portion and said pickup auger includes a plurality of blades extending along the length of thereof said plurality of blades being adapted and arranged in said auger channel to maintain a constant developer material distance from said developer member along the length said auger channel, said pickup auger having a first blade nearest said first end portion and a last blade nearest said second end portion, and said blades having a continuously decreasing blade pitch to diameter ratio from said first blade to said last blade.