Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
47 words
In an electrophotographic copying apparatus for developing electrostatic latent images on a photosensitive outer surface of a rotating developing drum, the drum being moved through a development zone in contact with a cascading flow of two-component developer material to develop the latent electrostatic image, the apparatus including:
Claim 2
Dependent Claim
47 words
In an electrophotographic copying apparatus for developing electrostatic latent images on a photosensitive outer surface of a rotating developing drum, the drum being moved through a development zone in contact with a cascading flow of two-component developer material to develop the latent electrostatic image, the apparatus including:
Claim 3
Dependent Claim
144 words
(a) a sump containing a supply of developing material including electrically charged toner particles displaying the opposite electrostatic polarity of said image, (b) a first cylindrical electrode supported for rotation in the direction of movement of said surface; (c) a first bias supply for forming a brush on the surface of said electrode for developing said image, said first electrode being located close enough to the surface of the drum to brush the surface and thereby develop said images, (d) a second cylindrical electrode supported for rotation opposite the direction of movement of said surface, (e) a second bias supply means for forming a brush of toner material on the surface of said second electrode for developing the images, said second electrode being located sufficiently close to said surface of said drum to brush the surface and develop the trailing edges of said images,
Claim 4
Dependent Claim
144 words
(a) a sump containing a supply of developing material including electrically charged toner particles displaying the opposite electrostatic polarity of said image, (b) a first cylindrical electrode supported for rotation in the direction of movement of said surface; (c) a first bias supply for forming a brush on the surface of said electrode for developing said image, said first electrode being located close enough to the surface of the drum to brush the surface and thereby develop said images, (d) a second cylindrical electrode supported for rotation opposite the direction of movement of said surface, (e) a second bias supply means for forming a brush of toner material on the surface of said second electrode for developing the images, said second electrode being located sufficiently close to said surface of said drum to brush the surface and develop the trailing edges of said images,
Claim 5
Dependent Claim
63 words
(f) a plate electrode extending parallel to said drum between said first and second electrodes, (g) a third bias supply for biasing said plate electrode to supplement the development of said images, and (h) means for directing a supply of toner material over said first cylindrical electrode and along a path between said plate electrode and said drum to develop said latent images.
Claim 6
Dependent Claim
63 words
(f) a plate electrode extending parallel to said drum between said first and second electrodes, (g) a third bias supply for biasing said plate electrode to supplement the development of said images, and (h) means for directing a supply of toner material over said first cylindrical electrode and along a path between said plate electrode and said drum to develop said latent images.
Claim 7
Dependent Claim
50 words
Apparatus as claimed in claim 1 wherein said plate electrode extends from a position closely adjacent said first electrode to a point spaced from said second electrode, the spacing between the plate electrode and the second cylindrical electrode defining an opening for allowing the toner to fall into the sump.
Claim 8
Dependent Claim
34 words
Apparatus as claimed in claim 2 further comprising a plate adjacent the space between the plate and second cylindrical electrodes to limit the amount of toner reaching the second electrode along said toner path.
Claim 9
Dependent Claim
27 words
An assembly as claimed in claim 3 further comprising a doctor blade adjacent the second electrode for limiting the size of the brush formed on the electrode.
Claim 10
Dependent Claim
22 words
An assembly as claimed in claim 2 comprising a third cylindrical electrode rotating against the direction of movement of said photoconductor surface.
Claim 11
Dependent Claim
33 words
An assembly as claimed in claim 5 further comprising means for applying a bias potential to said third roller relative to the background potential of said latent image to clean said photoconductive surface.
Claim 12
Dependent Claim
35 words
An assembly as claimed in claim 6 further comprising a second plate electrode located adjacent said moving surface between said second and third cylindrical electrodes, said electrode being biased to facilitate cleaning of said drum.
Claim 13
Dependent Claim
18 words
Apparatus as claimed in claim 7 wherein said second electrode is of lesser extent than said first electrode.