Process for transferring dry developed electrographic images

Claim 2

A method as described in claim 1 wherein the receiver sheet is comprised of an electrically conducting metal.

Claim 3

The method as described in claim 1 wherein following the step of separating said sheet from said element the residual transfer medium is removed and the transferred powder image is fixed to said receiving sheet.

Claim 4

A process for producing lithographic plates comprising the steps of forming an imagewise charge pattern on an image-bearing element, developing said pattern with a dry developer composition comprised of particulate toner material and dry carrier material, moistening a receiver sheet with an electrically insulating organic liquid which is not a solvent for the image-bearing element, applying an electric potential across said moistened sheet and said dry, developed image-bearing element, placing said moistened sheet in face-to-face contact with said dry, developed image-bearing element while maintaining said potential, separating said sheet from said element whereby the developed image is transferred to said Sheet, fixing the transferred image and rendering the nonimage areas water receptive.

Claim 5

A process as described in claim 5 wherein the receiver sheet is comprised of an electrically conductive metal.

Claim 6

A process as described in claim 5 wherein the charge pattern is subjected to magnetic-brush development.

Claim 7

A process as described in claim 5 wherein the liquid applied to said receiver sheet is a slowly evaporating hydrocarbon having a volume resistivity of greater than about 109 ohm-cm.

Claim 8

A process as described in claim 4 wherein the image-bearing element is an electrophotoconductive element containing an organic photoconductor.

Claim 9

A process for producing lithographic plates comprising the steps of forming an imagewise charge pattern on an electrophotographic element, developing said charge pattern with a dry developer composition comprising particulate toner material and dry carrier material, providing a receiver sheet comprised of an electrically conductive metal, moistening said sheet with a liquid transfer medium consisting essentially of an electrically insulating liquid which is not a solvent for said image-bearing element and which comprises an organic distillate having a boiling point in the range of from about 150* to 250* C., applying an electric potential across said moistened sheet and said dry, developed electrophotographic element, placing said moistened receiver sheet with the moistened surface in face-to-face contact with the dry developed image-bearing surface of said element while maintaining said electric potential, applying pressure to said sheet while in contact with said element and transferring the said developed image to said sheet, separating said sheet, fusing the transferred image and rendering the nonimage areas water receptive.

Claim 10

A process as described in claim 10 wherein said charge pattern is developed by magnetic-brush techniques and wherein said liquid transfer medium has a volume resistivity of greater than about 109 ohm-cm.

Claim 11

A process as described in claim 11 wherein said receiver sheet is comprised of a metal selected from the group consisting of aluminum, chromium, copper, nickel, stainless steel and tin.