Orville C Rodenberg

47680466, Aug 30, 1988

Oct 23, 1987

7/111946

James C. Minor - Rochester NY
Orville C. Rodenberg - Rochester NY

Eastman Kodak Company - Rochester NY

G01D 1500

3461601

In multi-color reversal development, good color balance is obtained by changing the time duration of exposure for each different color frame. A dot printer apparatus produces a series of different color-resolved electrostatic latent images on a recording member. The apparatus includes an array of discrete elements for dot recording on the recording medium. The elements are selectively enable for predetermined periods of time during a cycle of operation to form a color-resolved electrostatic latent image on the recording member. Each charge latent image is developed with selected toner particles according to its resolved color. A control signal representative at least in part of the resolved color of each latent image is produced, and the control signal determines the enablement time of the elements during each cycle of operation according to each resolved color.

51012162, Mar 31, 1992

Sep 21, 1990

7/586623

William Mey - Rochester NY
John W. May - Rochester NY
William T. Gruenbaum - Rochester NY
Kelly S. Robinson - Fairport NY
Orville C. Rodenberg - Rochester NY

Eastman Kodak Company - Rochester NY

G01D 900
B41M 5025

346 11

A xeroprinting master is formed by depositing a corona charge injection modifying material on a master substrate which includes a charge transport layer. The material can block the injection of charge that would otherwise inject into the charge transport layer or it can inject charge that would otherwise remain on the surface of the master. Preferably, the deposit is made by a conventional printer such as an ink jet, impact or thermal printer and the resulting deposit is not fused before use in xeroprinting.

50400290, Aug 13, 1991

Nov 1, 1989

7/430037

Orville C. Rodenberg - Rochester NY
James F. Paxon - Rochester NY
Richard C. Baughman - Geneseo NY
Rose M. Bothner - Rochester NY
William J. Hagen - Rochester NY

Eastman Kodak Company - Rochester NY

G03G 1516
G03G 1501

355271

Color toner images are transferred in registry to a receiving sheet held on a transfer drum. To facilitate releasing the sheet with the last image the drum surface is roughened, providing at least 0. 002 inches between peaks and valleys. To offset difficulties created by such roughening in initial securing of the sheet to the drum, a transfer field is not applied as the leading edge of the sheet leaves the nip. The transfer field is applied after a short portion of the sheet, for example, 0. 25 inches has left the nip.

52670066, Nov 30, 1993

Nov 4, 1992

7/971130

Edward T. Miskinis - Rochester NY
Orville C. Rodenberg - Rochester NY
Gary B. Bertram - Honeoye Falls NY
Bruce D. MacLellan - Ontario NY

Eastman Kodak Company - Rochester NY

G03G 2100

355296

In electrographic apparatus a latent image on a flexible photoconductor is developed with toner particles at a development station and subsequently transferred to a receiver sheet, such as a copy sheet, and then fused to the sheet. Sometimes unwanted particles are on the photoconductor, including the area where an image is to be developed on the photoconductor. These particles are removed by a magnetic brush system located closely adjacent the surface of the photoconductor prior to the charging station. By means of a pair of tapered skis the cleaning pressure across the photoconductor is maintained at a uniform pressure during cleaning of the photoconductor so that the photoconductor is uniformly cleaned.

49672363, Oct 30, 1990

Dec 27, 1989

7/457614

Orville C. Rodenberg - Rochester NY
William Mey - Rochester NY
Francis M. Paczkowski - Rochester NY
Salvatore Leone - Rochester NY

Eastman Kodak Company - Rochester NY

G03G 1514

355272

Xeroprinting is performed without fusing a master toner image. A master toner image is made by conventional electrophotography, for example, by charging, imagewise exposing and applying toner to a photoconductive imaging member to create a first toner image. The first toner image is charged with charges of a first polarity opposite that of the toner image and the member is erased with erase illumination through its base. This creates a toner image with a charge opposite that of the original toner image which is tightly held by opposite charges which have migrated to the portion of the electrophotosensitive member just under the toner. The imaging member is then toned again with toner of the same polarity as the original toner to create a second toner image that overlies the first toner image. The imaging member is again erased through its base, and the second toner image is transferred to a receiving sheet without disturbing the first toner image. The toner image may then be used as a master to repeat the process but without the necessity of creating the master toner image again.

51242184, Jun 23, 1992

Jul 15, 1991

7/731117

William Mey - Rochester NY
Susan E. Riblett - Rochester NY
Orville C. Rodenberg - Rochester NY

Eastman Kodak Company - Rochester NY

G03G 1324

430 55

A photoconductor element is provided that has non-blurring latent image keeping memory which is suitable for multiple electrophotographic copying from a single imaging step. The element preferably incorporates a charge generation layer which comprises a phthalocyanine dye or pigment. The copying method involves simultaneous application of corona charge and an image exposure to the element followed by uniform irradiation of the element. Thereafter a plurality of copies can be made by the step sequence of toner deposition, toner transfer, and toner heat fusion to a receiver.

44736266, Sep 25, 1984

Apr 25, 1983

6/488297

Michel F. Molaire - Rochester NY
Paul L. Nielsen - Rochester NY
Orville C. Rodenberg - Rochester NY

Eastman Kodak Company - Rochester NY

G03G 1704

430 32

Electrically photosensitive materials comprising electrically photosensitive colorant particles dispersed in a liquefiable, electrically insulating carrier containing a binder polymer and electropolymerizable bisphenol-acrylate monomers or mixtures of such monomers are disclosed. The disclosed materials are employed in photoelectrophoretic processes wherein the colorant particles are caused to migrate by the action of light and an electric field, while the material is electrohardened by the electric field.

50533045, Oct 1, 1991

Dec 27, 1989

7/457675

William Mey - Rochester NY
Susan E. Riblett - Rochester NY
Orville C. Rodenberg - Rochester NY

Eastman Kodak Company - Rochester NY

G03G 5047
G03G 514

430 59

A photoconductor element is provided that has non-blurring latent image keeping memory which is suitable for multiple electrophotographic copying from a single imaging step. The element preferably incorporates a charge generation layer which comprises a phthalocyanine dye or pigment. The copying method involves simultaneous application of corona charge and an image exposure to the element followed by uniform irradiation of the element. Thereafter a plurality of copies can be made by the step sequence of toner deposition, toner transfer, and toner heat fusion to a receiver.