Abstract A magnetic brush developing apparatus as disclosed having magnetic rollers with end sleeves formed of an insulating material. A trimming bar is provided having a concave portion below a leading edge thereof to facilitate the return to the sump zone of excess developing material. Magnets disposed within the rollers are mounted on channel members in a manner to direct the magnetic forces about each brush to ensure blanket coverage and a downstream configuration to direct developing material over a baffle associated with a cross-mixing baffle assembly. A screen is provided within the housing of the assembly to collect foreign objects. A mixing and transport device is positioned within the sump zone and is comprised of a plurality of spaced-apart augurs disposed on a shaft and a plurality of radially-extending bars affixed to the ends of the augurs.
In a magnetic brush developing apparatus for applying developing materials to a photoconductive surface including electrostatic latent images in an electrostatic printing machine, having a housing defining a sump zone and wherein a cross-mixing baffle is provided to redistribute depleted developing material within said sump zone, the improvement comprising: a U-shaped screen member positioned below said cross-mixing baffle and extending the width of said housing.
Claim 2
Dependent Claim
65 words
In a magnetic brush developing apparatus for applying developing materials to a photoconductive surface including electrostatic latent images in an electrostatic printing machine, having a housing defining a sump zone and wherein a cross-mixing baffle is provided to redistribute depleted developing material within said sump zone, the improvement comprising: a U-shaped screen member positioned below said cross-mixing baffle and extending the width of said housing.