Arthur S Kroll

US Patent:

51112450, May 5, 1992

Filed:

Dec 3, 1990

Appl. No.:

7/621686

Inventors:

Michael L. DeCecca - Fairport NY
Arthur S. Kroll - Rochester NY
Arthur E. Dunn - Rochester NY

Assignee:

Eastman Kodak Company - Rochester NY

International Classification:

G03G 1501

US Classification:

355245

Abstract:

An applicator for a development unit is precisely positioned with respect to an image member, such as a photoconductive drum. A pair of pins are fixed with respect to the image member and fit in a pair of holes that are fixed with respect to the applicator. A roller on each of opposite ends of the applicator engages a surface of the image member to properly space the applicator and image member, while the pins and holes control relative lateral and rotational movement.

US Patent:

40130410, Mar 22, 1977

Filed:

Oct 24, 1975

Appl. No.:

5/625427

Inventors:

Timothy G. Armstrong - Rochester NY
Arthur S. Kroll - Spencerport NY
Frank A. Shuster - Rochester NY

Assignee:

Eastman Kodak Company - Rochester NY

International Classification:

G03G 1508

US Classification:

118656

Abstract:

An electrographic apparatus, of the type employing a brush-type developer applicator which contacts one side of a flexible electrostatic image-bearing web, has (1) a web feed-path constructed in a predetermined configuration and (2) the applicator predeterminedly positioned relative to the feed-path defining elements, such that the flexible image-bearing web is allowed to move freely toward and away from the developer applicator in response to the varying contours of the applicator.

US Patent:

50831666, Jan 21, 1992

Filed:

Oct 20, 1989

Appl. No.:

7/424634

Inventors:

Lawrence A. Hill - Rochester NY
Michael E. Jacobs - Henrietta NY
Arthur S. Kroll - Rochester NY
Ralph E. Williams - Rochester NY

Assignee:

Eastman Kodak Company - Rochester NY

International Classification:

G03G 1506
G03G 2100

US Classification:

355260

Abstract:

A development station for developing electrostatic images includes a housing which has a vertically oriented separating wall which divides the housing into first and second chambers. In assembly both chambers are open at the top permitting ready loading of one chamber with a mixture of toner and carrier and the other chamber with substantially toner. The separating wall includes an opening at the bottom for passage of toner into the chamber containing the mixture. A toner applicator is located at the top of the chamber containing the mixture and a cover is permanently affixed across the tops of the chambers, totally sealing the chambers except for an opening in the cover opposite the toner-applicator. Because of the design of the station, especially the chambers which are open at the top for easy loading of toner and carrier, the station can economically be made disposable. A method for assembling the elements which make up the development station and for loading the toner and/or carrier in the various chambers is also described.

US Patent:

45705720, Feb 18, 1986

Filed:

Mar 28, 1985

Appl. No.:

6/717257

Inventors:

Kelly S. Robinson - Rochester NY
Richard A. Weitzel - Hilton NY
Arthur S. Kroll - Rochester NY

Assignee:

Eastman Kodak Company - Rochester NY

International Classification:

G03G 1509

US Classification:

118657

Abstract:

An electrographic development apparatus comprises a magnetic brush applicator having cooling means for dissipating thermal energy from the developer as it is transported by the brush. Such cooling means preferably comprises means for passing a cooling fluid through the interior of the brush while in use. Alternatively, such cooling means comprises a hollow skive through which a cooling fluid is circulated.

US Patent:

51929724, Mar 9, 1993

Filed:

Dec 24, 1990

Appl. No.:

7/632677

Inventors:

Arthur S. Kroll - Rochester NY
Wunan Chang - Rochester NY

Assignee:

Eastman Kodak Company - Rochester NY

International Classification:

G03G 2100

US Classification:

355208

Abstract:

A toner monitor in an electrostatographic machine is automatically calibrated when a toner monitor is periodically caused to read a simulated nominal toner concentration. Any difference between the monitor's output and that expected for the simulated nominal toner concentration is applied to a compensation device. The simulated nominal toner concentration signal is obtained by periodic alignment of the toner monitor with a magnetically permeability member.

US Patent:

49223020, May 1, 1990

Filed:

Jul 7, 1988

Appl. No.:

7/216671

Inventors:

Lawrence A. Hill - Rochester NY
Michael E. Jacobs - Henrietta NY
Arthur S. Kroll - Brighton NY
Ralph E. Williams - Rochester NY

Assignee:

Eastman Kodak Company - Rochester NY

International Classification:

G03G 1508
G03G 1509

US Classification:

355251

Abstract:

A device for developing electrostatic images carried on a film belt in an apparatus receiving the developing device includes device location surfaces which seat on apparatus location surfaces in the apparatus to locate the device with respect to the apparatus. Film support surfaces on the device support the film belt a fixed spacing from a developer applicator. The film support surfaces are located within tight tolerances with respect to the surface of the applicator to provide accurate positioning of the applicator and film belt.

US Patent:

49477889, Aug 14, 1990

Filed:

Oct 17, 1988

Appl. No.:

7/258938

Inventors:

Lawrence A. Hill - Rochester NY
Arthur S. Kroll - Rochester NY
Ralph E. Williams - Rochester NY

Assignee:

Eastman Kodak Company - Rochester NY

International Classification:

G03G 1506

US Classification:

118653

Abstract:

A replaceable development station usable for developing electrostatic images in an apparatus having a toner monitor and a channel for slidably receiving the development station includes a chamber containing a supply of a development mixture of toner and carrier particles. A recess is defined in one wall of the chamber for receiving the toner monitor, the recess being defined by a thinned region of the wall such that the toner monitor is separated from the developer mixture by a wall region substantially thinner than the general wall thickness.

US Patent:

45318328, Jul 30, 1985

Filed:

Aug 1, 1983

Appl. No.:

6/519476

Inventors:

Arthur S. Kroll - Rochester NY
Frank A. Shuster - Rochester NY

Assignee:

Eastman Kodak Company - Rochester NY

International Classification:

G03G 1509

US Classification:

355 3DD

Abstract:

Contrast and/or density adjustment of developed electrographic images is effected in a development system comprising a hard magnetic carrier and a magnetic brush having a rotary core and shell. The adjustment is effected by cooperatively varying the core and shell rotation rates, within predetermined ranges, in a manner which maintains the operative developer linear velocity generally equal to, and co-current with, the velocity of an electrographic image member's movement through the development zone.