Development system

Claim 3

An apparatus as recited in claim 1, further including means for producing relative movement between said member and the magnetic field to move the particles attracted to said member into contact with the latent image.

Claim 4

An apparatus as recited in claim 2, wherein said member includes a rotatably mounted tubular member.

Claim 5

An apparatus as recited in claim 3, wherein said generating means includes a magnetic member disposed interiorly of said tubular member.

Claim 6

An apparatus as recited in claim 4, wherein said producing means includes means for rotating said tubular member relative to said magnetic member with said magnetic member being substantially stationary.

Claim 7

An apparatus as recited in claim 4, wherein said producing means includes means for rotating said magnetic member relative to said tubular member with said tubular member being substantially stationary.

Claim 9

An apparatus as recited in claim 6, wherein said vibrator vibrates said tubular member at a frequency range from about 20,000 hertz to about 100,000 hertz.

Claim 10

An electrophotographic printing machine of the type in which an electrostatic latent image recorded on a photoconductive member is developed with particles having low conductivity, wherein the improvement includes: a member spaced from the photoconductive member to define a gap therebetween; means for attracting the particles to said member, said attracting means comprising means for generating a magnetic field to attract particles to said member; and means for reducing the particle to particle electrostatic attractive force and increasing the bulk conductivity of the particles on said member to improve the flow of the particles and development of the latent image with the low conductivity particles, said reducing means comprising a vibrator coupled to said member for vibrating said member relative to the latent image.

Claim 11

An electrophotographic printing machine of the type in which an electrostatic latent image recorded on a photoconductive member is developed with particles having low conductivity, wherein the improvement includes: a member spaced from the photoconductive member to define a gap therebetween; means for attracting the particles to said member, said attracting means comprising means for generating a magnetic field to attract particles to said member; and means for reducing the particle to particle electrostatic attractive force and increasing the bulk conductivity of the particles on said member to improve the flow of the particles and development of the latent image with the low conductivity particles, said reducing means comprising a vibrator coupled to said member for vibrating said member relative to the latent image.

Claim 12

A printing machine as recited in claim 9, further including means for producing relative movement between said member and the magnetic field to move the particles attracted to said member into contact with the electrostatic latent image recorded on the photoconductive member.

Claim 13

A printing machine as recited in claim 10, wherein said member includes a rotatably mounted tubular member.

Claim 14

A printing machine as recited in claim 11, wherein said generating means includes a magnetic member disposed interiorly of said tubular member.

Claim 15

A printing machine as recited in claim 12, wherein said producing means includes means for rotating said tubular member relative to said magnetic member with said magnetic member being substantially stationary.

Claim 16

A printing machine as recited in claim 12, wherein said producing means includes means for rotating said magnetic member relative to said tubular member with said tubular member being substantially stationary.

Claim 17

A printing machine as recited in claims 13 or 14, further including means for electrically biasing said tubular member relative to the photoconductive member having the electrostatic latent image recorded thereon.

Claim 18

A printing machine as recited in claim 15, wherein said vibrator vibrates said tubular member at a frequency ranging from about 20,000 hertz to about 100,000 hertz.