Apparatus for pattern generation on a dielectric substrate

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.

A method for pattern generation on a dielectric substrate having first and second surfaces and including the steps of:

• applying voltage signals to a first surface of the dielectric substrate whereby said voltage signals vary with time and represent a desired pattern;
• 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
• employing the non-visible charge pattern to provide a visible image.

A method for patterning of a dielectric substrate having first and second surfaces and comprising the steps of:

• imagewise application of voltage to a first surface of the dielectric substrate;
• 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 an whereby as a result 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
• employing the non-visible charge distribution to provide a visible image.

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.

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.

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.