Photoactive device for xerography

Claim 2

A xerographic system comprising: a removable electron- or hole-conductive matrix; a plate, screen, flexible belt or axially rotatable drum comprising a base and at least one externally applied photoconductive coat and arranged in temporary contact with the matrix essentially only in an area of image exposure; an electrostatic charging means arranged in charging relation to the free surface of the matrix out of contact with the photoconductive coat; means for imagewise exposing the photoconductive coat while in contact with the matrix; and means for developing or transferring and developing the resulting image.

Claim 3

A xerographic system of claim 1 wherein the removable conductive matrix is a flexible belt in at least tangential contact with the photoconductive coat.

Claim 4

A xerographic system of claim 1 wherein the base and at least one externally applied photoconductive coat is in the form of a plate.

Claim 5

A xerographic system of claim 1 wherein the removable charge- or hole-conductive matrix is a consumable.

Claim 6

A xerographic system of claim 4 wherein the removable charge- or hole-conductive matrix is essentially transparent.

Claim 7

The xerographic system of claim 2 wherein the flexible matrix belt consists essentially of an axially oriented charge conductive polymeric matrix material having a number average molecular weight of about 100,000 to about 2.5 million.

Claim 8

The system of claim 2 wherein the flexible belt is biaxially oriented.

Claim 9

The xerographic system of claim 6 wherein the axially rotatable drum comprises a charge conductive substrate and a selenium-containing photoconductive layer.

Claim 10

The xerographic system of claim 1 wherein the photoconductive coat comprises a metal free phthalocyanine layer.

Claim 11

The system of claim 1 wherein a photoconductive coat is externally applied onto a metal belt.

Claim 12

The system of claim 1 wherein the photoconductive coat is externally applied onto a metal coated belt.

Claim 13

A xerographic system having in combination a movable flexible belt comprising a dimensionally stable electron or hole conductive matrix material; an axially rotatable drum having a cylindrical element comprising a base and at least one externally applied photoconductor layer, the drum being in at least rotatable tangent line contact with the movable charged belt; an electrostatic charging means in charging relation to an external surface of the belt; means for imagewise exposing the photoconductor layer of the drum while in contact with the flexible belt; means for developing, or transferring and developing, the resulting latent electrostatic image; and means for transferring the resulting developed image onto a suitable backing.

Claim 14

A xerographic system having in combination a movable flexible belt comprising a dimensionally stable electron or hole conductive matrix material; an axially rotatable drum having a cylindrical element comprising a base and at least one externally applied photoconductor layer, the drum being in at least rotatable tangent line contact with the movable charged belt; an electrostatic charging means in charging relation to an external surface of the belt; means for imagewise exposing the photoconductor layer of the drum while in contact with the flexible belt; means for developing, or transferring and developing, the resulting latent electrostatic image; and means for transferring the resulting developed image onto a suitable backing.

Claim 15

The xerographic system of claim 12 wherein the axially rotatable drum comprises a charging conductive substrate and a selenium-containing charge generating photoconductive layer.

Claim 16

The system of claim 12 wherein the belt is cleaned subsequent to image transfer by contact with a cleaning means.

Claim 17

The system of claim 14 wherein the cleaning means is one or both of a blade and a rotating brush.

Claim 18

A xerographic system comprising a plate, screen, flexible belt or axially rotatable drum comprising: a base and at least one externally applied photoconductive coat; a removable electron- or hole-conductive matrix in the form of a flexible belt consisting essentially of an axially oriented charge conductive polymer having a number average molecular weight of about 100,000 to about 2.5 million, and comprising at least one of poly-N-vinylcarbazole, poly-1-vinylpyrene, poly-9-vinylanthracene, polyacenaphthalene, poly-9-(4-pentenyl)carbazole, poly-9-(5-hexyl)carbazole, polymethylene pyrene, or corresponding n-substituted polymeric acrylic acid amide of pyrene, said belt being arranged in at least tangential temporary contact with the photoconductive coat; an electrostatic charging means arranged in charging relation to a free surface of the matrix; means for imagewise exposing the photoconductive coat while in contact with the matrix; and means for developing, or transferring and developing the resulting image.

Claim 19

A xerographic system comprising a plate, screen, flexible belt or axially rotatable drum comprising: a base and at least one externally applied photoconductive coat; a removable electron- or hole-conductive matrix in the form of a flexible belt consisting essentially of an axially oriented charge conductive polymer having a number average molecular weight of about 100,000 to about 2.5 million, and comprising at least one of poly-N-vinylcarbazole, poly-1-vinylpyrene, poly-9-vinylanthracene, polyacenaphthalene, poly-9-(4-pentenyl)carbazole, poly-9-(5-hexyl)carbazole, polymethylene pyrene, or corresponding n-substituted polymeric acrylic acid amide of pyrene, said belt being arranged in at least tangential temporary contact with the photoconductive coat; an electrostatic charging means arranged in charging relation to a free surface of the matrix; means for imagewise exposing the photoconductive coat while in contact with the matrix; and means for developing, or transferring and developing the resulting image.