Jerome L Jackson

US Patent:

39804747, Sep 14, 1976

Filed:

Oct 16, 1974

Appl. No.:

5/515172

Inventors:

Jerome E. Jackson - Shaker Heights OH

Assignee:

Addressograph Multigraph Corporation - Cleveland OH

International Classification:

G03G 1322

US Classification:

96 1R

Abstract:

An ion modulator process capable of producing copies of high contrast and with low background utilizes a constant charge density applied in the dark to set up uniform fringing fields which block ions directed towards background (light) areas. Funneling fields are set up in image (dark) areas in opposition to the original uniform fringing fields by simultaneous imaging and ion projection decreasing the effect of such fringing fields and permitting ions to pass through the modulator in image areas.

US Patent:

40225275, May 10, 1977

Filed:

May 29, 1975

Appl. No.:

5/581724

Inventors:

Jerome Edward Jackson - Shaker Heights OH

Assignee:

Addressograph-Multigraph Corporation - Cleveland OH

International Classification:

G03G 1500

US Classification:

355 3R

Abstract:

An ion modulator having a bias electrode which is independently controllable improves the modulation and focusing of projected ions. Such a modulator is constructed so as to reduce the adverse effects of corona discharge upon the modulator.

US Patent:

40921603, May 30, 1978

Filed:

Mar 25, 1975

Appl. No.:

5/561681

Inventors:

Jerome E. Jackson - Shaker Heights OH
John D. Blades - Chagrin Falls OH

Assignee:

Addressograph-Multigraph Corp. - Cleveland OH

International Classification:

G03G 1300

US Classification:

96 1R

Abstract:

An ion modulator having a bias electrode is capable of producing copies in which the contrast and background are controllable. Such modulator functions in a process which utilizes an adjustable charge density applied to set up uniform fringing fields of the desired magnitude which block ions directed towards background (light) areas. Funneling fields are set up in image (dark) areas in opposition to the original fringing fields by simultaneous imaging and ion projection, decreasing the effect of such fringing fields and permitting ions to pass through the modulator in image areas.

US Patent:

39868710, Oct 19, 1976

Filed:

Dec 12, 1973

Appl. No.:

5/423883

Inventors:

John D. Blades - Chagrin Falls OH
Jerome E. Jackson - Shaker Heights OH

Assignee:

Addressograph-Multigraph Corporation - Cleveland OH

International Classification:

G03G 13044

US Classification:

96 1R

Abstract:

The invention is an improved modulator, in the form of a screen, having the capability of selectively passing therethrough charged particles, such as gas ions, in accordance with a pattern that corresponds to the image and non-image areas of a graphic original. The apertured modulator is formed from a metal screen, such as a 200 mesh wire screen, having a wire cross section of 0. 051 millimeter and is overcoated with a four-micron thickness of a photoconductor, such as selenium or an organic photoconductor, over which is next applied an equal thickness of an insulating layer, such as polystyrene. The three-layered modulator constructed in this manner is imparted a charge pattern corresponding to the graphic subject to be reproduced by the creation of a charge distribution system (CDS) on the insulating surface. The CDS created on the modulator in the environment of this invention is completely passive to electromagnetic radiation. The modulator is placed between an emission electrode and collection electrode to selectively pass therethrough gas ions to be received onto a dielectric surface in a charge pattern corresponding to the graphic subject from which the charge distribution system was created on the insulating layer.

US Patent:

40225283, May 10, 1977

Filed:

May 29, 1975

Appl. No.:

5/581723

Inventors:

Jerome E. Jackson - Shaker Heights OH

Assignee:

Addressograph Multigraph Corporation - Cleveland OH

International Classification:

G03G 1500

US Classification:

355 3R

Abstract:

An ion modulator having a bias electrode which is independently controllable improves the modulation and focusing of projected ions. Such a modulator is constructed so as to reduce the adverse effects of corona discharge upon the modulator.