Magnetic brush developer

Claim 1

IN AN APPARATUS FOR DEVELOPING AN ELECTROSTATIC LATENT IMAGE, COMPRISING A MAGNETIC BRUSH FORMED ON A CYLINDRICAL MEMBER AND DISPOSED WITHIN A TROUGH, A PARTICULATE DEVELOPER COMPRISING A MAGNETIC CARRIER AND A TONER DISPOSED IN SAID TROUGH, SAID CYLINDRICAL MEMBER PARTIALLY IMMERSED IN SAID DEVELOPER, MEANS FOR ROTATING SAID CYLINDER, MEANS FOR PASSING A LATENT IMAGE IN PROXIMITY TO AND IN CONTACT WITH THE BRUSH THEREBY DEVELOPING SAID IMAGE, AND SCRAPING MEANS FOR REMOVING RESIDUAL DEVELOPER FROM SAID CYLINDRICAL MEMBER FOR RETURN TO SAID TROUGH AFTER DEVELOPMENT, SAID SCRAPING MEANS BEING LOCATED DOWNSTREAM OF THE ZONE OF IMAGE DEVELOPMENT AND EXTENDING ALONG THE LONGITUDINAL EXTENT OF SAID CYLINDER, THE IMPROVEMENT WHICH COMPRISES SAID SCRAPING MEANS COMPRISING A SCRAPING PLATE EXTENDING UPWARDLY AND ALONG SAID

Claim 3

An apparatus according to claiml 1, wherein said guide elements are rearwardly extending from the rear edge of said scraping plate.

Claim 6

An apparatus according to cliam 1, wherein said guide elements comprise a plurality of spaced panels rearwardly extending from the rear edge of said scraping plate and a panel element extending from each lateral edge of each said spaced panel and directed downwardly and outwardly with respect to said spaced panels and said scraping plate.

Claim 7

An apparatus according to cliam 1, wherein said guide elements comprise a plurality of spaced panels rearwardly extending from the rear edge of said scraping plate and a panel element extending from each lateral edge of each said spaced panel and directed downwardly and outwardly with respect to said spaced panels and said scraping plate.

Claim 8

An apparatus for developing an electrostatic latent image comprising a rotatable magnetic brush formed on a cylindrical member and disposed within a trough, a particulate developer comprising a magnetic carrier and a toner disposed in said trough, said cylindrical member partially immersed in said developer means for passing a latent image carrier in proximity to and in contact with the magnetic brush thereby developing said image, a fixed scraping plate located downstream of the zone of image development extending along the longitudinal extent of said cylinder and having an upwardly extending front edge in close proximity to said cylinder thereby removing residual developer from the cylinder for return to said trough, said plate including a plurality of spaced panels extending rearwardly from the rear edge of said plate, and a panel element extending from each lateral edge of each said spaced panel and directed downwardly and outWardly with respect to said spaced panels and said scraper plate, whereby developer material removed from said cylinder is moved axially of said cylinder by each of said panel panel elements to more uniformly mix the carrier and toner particles.

Claim 9

An apparatus for developing an electrostatic latent image comprising a rotatable magnetic brush formed on a cylindrical member and disposed within a trough, a particulate developer comprising a magnetic carrier and a toner disposed in said trough, said cylindrical member partially immersed in said developer means for passing a latent image carrier in proximity to and in contact with the magnetic brush thereby developing said image, a fixed scraping plate located downstream of the zone of image development extending along the longitudinal extent of said cylinder and having an upwardly extending front edge in close proximity to said cylinder thereby removing residual developer from the cylinder for return to said trough, said plate including a plurality of spaced panels extending rearwardly from the rear edge of said plate, and a panel element extending from each lateral edge of each said spaced panel and directed downwardly and outWardly with respect to said spaced panels and said scraper plate, whereby developer material removed from said cylinder is moved axially of said cylinder by each of said panel panel elements to more uniformly mix the carrier and toner particles.