Apparatus for pattern generation on a dielectric substrate

Claim 2

Apparatus for pattern generation on a dielectric substrate having first and second surfaces and including: means for applying voltage signals to a first surface of the dielectric substrate whereby said voltage signals vary with time and represent a desired pattern; means for applying a flow of charges generally only to a second surface of the dielectric substrate wherein said charges flow from a generally non-imagewise source and whereby as a result of application of such charges, the second surface retains a non-visible charge pattern corresponding to the desired pattern represented by the voltage signals; and means for thereafter employing the non-visible charge pattern to provide a visible image.

Claim 3

Apparatus for charge patterning of a dielectric substrate having first and second surfaces and comprising: means for imagewise application of voltage to a first surface of the dielectric substrate; means for applying a flow of charges generally only to a second surface of the dielectric substrate, wherein said charges flow from a generally non-imagewise source and whereby as a results of application of such charges the second surface retains a non-visible charge distribution corresponding to the voltage applied imagewise to the first surface; and means for thereafter employing the charge distribution to provide a visible image.

Claim 4

Apparatus for charge patterning of a dielectric substrate having first and second surfaces and comprising: means for imagewise application of voltage to a first surface of the dielectric substrate; means for applying a flow of charges generally only to a second surface of the dielectric substrate, wherein said charges flow from a generally non-imagewise source and whereby as a results of application of such charges the second surface retains a non-visible charge distribution corresponding to the voltage applied imagewise to the first surface; and means for thereafter employing the charge distribution to provide a visible image.

Claim 9

Apparatus according to claim 1 and wherein the flow of charges which is applied to the second surface of the dielectric substrate contains charges of both positive and negative polarities.

Claim 10

Apparatus according to claim 2 and wherein the flow of charges which is applied to the second surface of the dielectric substrate contains charges of both positive and negative polarities.

Claim 11

Apparatus according to claim 5 and wherein the flow of charges alternates in time between positive and negative charges.

Claim 12

Apparatus according to claim 6 and wherein the flow of charges alternates in time between positive and negative charges.

Claim 13

Apparatus according to claim 1 and wherein as the result of the flow of charges, the second surface retains a generally uniform charge corresponding to the voltage applied to the first surface.

Claim 14

A method according to claim 3 and wherein the flow of charges which is applied to the second surface of the dielectric substrate contains charges of both positive and negative polarities.

Claim 15

Apparatus according to claim 1 and wherein application of said charges to the second surface is operative to temporarily neutralize the effect on the second surface of the voltage applied to the first surface.

Claim 16

Apparatus according to claim 1 and wherein application of said charges to the second surface is operative to establish a charge pattern on the second surface in accordance with the voltage pattern on the first surface.

Claim 17

Apparatus for marking a dielectric substrate having first and second surfaces and including: means for applying voltage signals generally only to a first surface of the dielectric substrate whereby said voltage signals vary with time and represent a desired pattern; means for applying a flow of charges generally only to a second surface of the dielectric substrate wherein said charges flow from a generally non-imagewise source and whereby as a result of application of such charges, the second surface retains a non-visible charge pattern corresponding to the desired pattern represented by the voltage signals; and means for applying toner to said charge pattern on said second surface, thereby to define a marking on said dielectric substrate in accordance with said charge pattern.

Claim 18

Apparatus for marking a dielectric substrate having first and second surfaces and including: means for applying voltage signals generally only to a first surface of the dielectric substrate whereby said voltage signals vary with time and represent a desired pattern; means for applying a flow of charges generally only to a second surface of the dielectric substrate wherein said charges flow from a generally non-imagewise source and whereby as a result of application of such charges, the second surface retains a non-visible charge pattern corresponding to the desired pattern represented by the voltage signals; and means for applying toner to said charge pattern on said second surface, thereby to define a marking on said dielectric substrate in accordance with said charge pattern.

Claim 19

Apparatus for pattern generation on a dielectric substrate having first and second surfaces and including: means for applying a charge pattern to a first surface of the dielectric substrate; and means for applying an alternating flow of charges to a second surface of the dielectric substrate, wherein said charges flow from a generally non-imagewise source and whereby as a result of application of such charges the second surface retains a non-visible charge distribution corresponding to the charge pattern applied to the first surface; and means for thereafter employing the charge distribution to provide a visible image.

Claim 20

Apparatus for pattern generation on a dielectric substrate having first and second surfaces and including: means for applying a charge pattern to a first surface of the dielectric substrate; and means for applying an alternating flow of charges to a second surface of the dielectric substrate, wherein said charges flow from a generally non-imagewise source and whereby as a result of application of such charges the second surface retains a non-visible charge distribution corresponding to the charge pattern applied to the first surface; and means for thereafter employing the charge distribution to provide a visible image.

Claim 21

Apparatus according to claim 1 and wherein the charge pattern on the second surface is of a polarity opposite to the polarity of the voltage pattern on the first surface.

Claim 22

Apparatus according to claim 2 and wherein the charge pattern on the second surface is of a polarity opposite to the polarity of the voltage pattern on the first surface.

Claim 23

A method according to claim 3 and wherein the charge pattern on the second surface is of a polarity opposite to the polarity of the voltage pattern on the first surface.

Claim 24

A method according to claim 4 and wherein the charge pattern on the second surface is of a polarity opposite to the polarity of the voltage pattern on the first surface.

Claim 25

Apparatus according to claim 13 and wherein the charge pattern on the second surface is of a polarity opposite to the polarity of the voltage pattern on the first surface.

Claim 26

Apparatus according to claim 14 and wherein the charge pattern on the second surface is of a polarity opposite to the polarity of the voltage pattern on the first surface.

Claim 27

Apparatus for pattern generation on a dielectric substrate having first and second surfaces and including: means, including a plurality of conductive strips disposed adjacent said first surface, for applying voltage signals to a first surface of the dielectric substrate whereby said voltage signals vary with time and represent a desired pattern; corona means for applying a flow of charges generally only to a second surface of the dielectric substrate wherein said charges flow from a generally non-imagewise source and whereby as a result of application of such charges, the second surface retains a non-visible charge pattern corresponding to the desired pattern represented by the voltage signals; and means for thereafter employing the non-visible charge pattern to provide a visible image.

Claim 28

Apparatus for pattern generation on a dielectric substrate having first and second surfaces and including: means, including a plurality of conductive strips disposed adjacent said first surface, for applying voltage signals to a first surface of the dielectric substrate whereby said voltage signals vary with time and represent a desired pattern; corona means for applying a flow of charges generally only to a second surface of the dielectric substrate wherein said charges flow from a generally non-imagewise source and whereby as a result of application of such charges, the second surface retains a non-visible charge pattern corresponding to the desired pattern represented by the voltage signals; and means for thereafter employing the non-visible charge pattern to provide a visible image.