Danny Lee Slayton

US Patent:

48060976, Feb 21, 1989

Filed:

Mar 15, 1988

Appl. No.:

7/170075

Inventors:

Charles S. Palm - Norcross GA
Danny L. Slayton - Lilburn GA
Khosrow Lak - Doraville GA
Peter F. Sampson - Doraville GA
David R. Davis - Buford GA
Maurice S. Wheatley - Duluth GA
Gregory A. Chatham - Marietta GA
Wayne C. Jones - Duluth GA
Kirk W. Charles - Atlanta GA
Anthony J. Ireland - El Cerrito CA

Assignee:

Colorocs Corporation - Norcross GA

International Classification:

F27B 928
H05B 100

US Classification:

432 60

Abstract:

An improved full color electrophotographic print engine using flexible belts to carry a photosensitive electrostatic image developer and a transfer belt for building up composite developed images. Each belt, and an optical scanner, are driven by mechanically independent motors which are synchronized by an electronic digital controller implementing precise servos. The use of the flexible belts allows the machine to be relatively inexpensive, very small compared to previous full color print engines, and yet maintain precise registration of color composite images. An improved fuser mechanism with increased dwell time at constant machine speed is also shown. The fuser includes a pair of spaced-apart rollers, both of which urge a sheet of image receptor against the heated roller over a predetermined angular portion of the roller. The machine is specifically designed to be used interchangeably with an optical bench source as a copier or with a laser bench as a laser printer. Improved copy quality monitoring by sensing actual amounts of toner deposited on a photoreceptor belt is also shown.

US Patent:

47053852, Nov 10, 1987

Filed:

Nov 10, 1986

Appl. No.:

6/929268

Inventors:

Charles S. Palm - Norcross GA
Danny L. Slayton - Lilburn GA
Khosrow Lak - Doraville GA
Peter F. Sampson - Doraville GA
David R. Davis - Buford GA
Maurice S. Wheatley - Duluth GA
Gregory A. Chatham - Marietta GA
Wayne C. Jones - Duluth GA
Kirk W. Charles - Atlanta GA
Anthony J. Ireland - El Cerrito CA

Assignee:

Colorocs Corporation - Norcross GA

International Classification:

G03G 1501

US Classification:

355 4

Abstract:

An improved full color electrophotographic print engine using flexible belts to carry a photosensitive electrostatic image developer and a transfer belt for building up composite developed images. Each belt, and an optical scanner, are driven by mechanically independent motors which are synchronized by an electronic digital controller implementing precise servos. The use of the flexible belts allows the machine to be relatively inexpensive, very small compared to previous full color print engines, and yet maintain precise registration of color composite images. An improved fuser mechanism with increased dwell time at constant machine speed is also shown. The fuser includes a pair of spaced-apart rollers, both of which urge a sheet of image receptor against the heated roller over a predetermined angular portion of the roller. The machine is specifically designed to be used interchangeably with an optical bench source as a copier or with a laser bench as a laser printer. Improved copy quality monitoring by sensing actual amounts of toner deposited on a photoreceptor belt is also shown.

US Patent:

46979204, Oct 6, 1987

Filed:

Nov 10, 1986

Appl. No.:

6/929329

Inventors:

Charles S. Palm - Norcross GA
Danny L. Slayton - Lilburn GA
Khosrow Lak - Doraville GA
Peter F. Sampson - Doraville GA
David R. Davis - Buford GA
Maurice S. Wheatley - Duluth GA
Gregory A. Chatham - Marietta GA
Wayne C. Jones - Duluth GA
Kirk W. Charles - Atlanta GA
Anthony J. Ireland - El Cerrito CA

Assignee:

Colorocs Corporation - Norcross GA

International Classification:

G03G 1501
G03G 15048

US Classification:

355 14CH

Abstract:

An improved full color electrophotographic print engine using flexible belts to carry a photosensitive electrostatic image developer and a transfer belt for building up composite developed images. Each belt, and an optical scanner, are driven by mechanically independent motors which are synchronized by an electronic digital controller implementing precise servos. The use of the flexible belts allows the machine to be relatively inexpensive, very small compared to previous full color print engines, and yet maintain precise registration of color composite images. An improved fuser mechanism with increased dwell time at constant machine speed is also shown. The fuser includes a pair of spaced-apart rollers, both of which urge a sheet of image receptor against the heated roller over a predetermined angular portion of the roller. The machine is specifically designed to be used interchangeably with an optical bench source as a copier or with a laser bench as a laser printer. Improved copy quality monitoring by sensing actual amounts of toner deposited on a photoreceptor belt is also shown.

US Patent:

49890450, Jan 29, 1991

Filed:

May 1, 1989

Appl. No.:

7/345481

Inventors:

Danny L. Slayton - Lilburn GA
E. Neal Tompkins - Roswell GA
Khosrow Lak - Lawrenceville GA
Charles S. Palm - Pasadena CA

Assignee:

Colorocs Corporation - Norcross GA

International Classification:

G03G 1506
G03G 2100

US Classification:

355260

Abstract:

A toner module has a mixing roller and a decorator roller. The decorator roller, which extends partially through a developer opening, has a partial magnetic core enclosed by a developer carrying sleeve. Developer is removed by orientating a nonmagnetic portion of the core toward the developer opening. The decorator roller is then rotated so that the sleeve carries the used developer over the nonmagnetic portion, thereby allowing the developer to fall out of the toner module. New developer is added by orientating the magnetic portion of the core to face the developer opening. The decorator roller is then rotated so that, as the sleeve rotates over the developer to be added, the magnetic force of the developer core pulls the developer onto the sleeve and into the toner module. Orientating a magnetic portion of the mixing roller proximate to the decorator roller causes the developer to be carried further into the toner module, so as to provide for more storage volume for the developer.

US Patent:

46521151, Mar 24, 1987

Filed:

Oct 25, 1985

Appl. No.:

6/791218

Inventors:

Charles S. Palm - Norcross GA
Danny L. Slayton - Lilburn GA
Khosrow Lak - Doraville GA
Peter F. Sampson - Doraville GA
David R. Davis - Buford GA
Maurice S. Wheatley - Duluth GA
Gregory A. Chatham - Marietta GA
Wayne C. Jones - Duluth GA
Kirk W. Charles - Atlanta GA
Anthony J. Ireland - El Cerrito CA

Assignee:

Colorocs Corporation - Norcross GA

International Classification:

G03G 1500

US Classification:

355 14TR

Abstract:

An improved full color electrophotographic print engine using flexible belts to carry a photosensitive electrostatic image developer and a transfer belt for building up composite developed images. Each belt, and an optical scanner, are driven by mechanically independent motors which are synchronized by an electronic digital controller implementing precise servos. The use of the flexible belts allows the machine to be relatively inexpensive, very small compared to previous full color print engines, and yet maintain precise registration of color composite images. An improved fuser mechanism with increased dwell time at constant machine speed is also shown. The fuser includes a pair of spaced-apart rollers, both of which urge a sheet of image receptor against the heated roller over a predetermined angular portion of the roller. The machine is specifically designed to be used interchangeably with an optical bench source as a copier or with a laser bench as a laser printer. Improved copy quality monitoring by sensing actual amounts of toner deposited on a photoreceptor belt is also shown.

US Patent:

50271580, Jun 25, 1991

Filed:

Sep 5, 1989

Appl. No.:

7/403171

Inventors:

E. Neal Tompkins - Roswell GA
Danny L. Slayton - Lilburn GA

Assignee:

Colorocs Corporation - Norcross GA

International Classification:

G03G 1516
G03G 1501

US Classification:

355271

Abstract:

A print engine including a photosensitive belt which is an endless loop vertically mounted in the copier or printer housing. A photosensitive belt stretches over a pair of rollers such that the exterior of the surface of the belt defines a developing position for an electrostatic image in a substantial vertical plane. An exposure station in the copier housing focuses light on the developing position of the photosensitive belt forming the electrostatic image. Toner applied to the electrostatic image forms a developed image which is transferred to a second endless loop belt and subsequently communicated and fixed on an image receptor, such as paper. A second endless loop belt stretches between a first roller and a second roller. The first roller is vertically spaced-apart from the second roller. Each roller is horizontally and vertically off-set from one of the pair of rollers around which the photosensitive belt is stretched.

US Patent:

49011103, Feb 13, 1990

Filed:

Dec 18, 1987

Appl. No.:

7/135113

Inventors:

E. Neal Tompkins - Roswell GA
Danny L. Slayton - Lilburn GA

Assignee:

Colorocs Corporation - Norcross GA

International Classification:

G03G 1500

US Classification:

355212

Abstract:

An electrophotographic print engine with a photosensitive flexible belt stretched over a plurality of rollers in a compact electrophotographic printer such that a developing position on the belt is disposed in a vertical plane, the developing position exposed first to a light on one side of the printer and activated to trace the image of the document to be printed and second passed vertically adjacent at least one toner module extending a decorator roller horizontally to the photosensitive belt on a second side of the printer to create a developed image, the developed image transferred at the upper end of the vertically disposed belt to the downward facing side of a sheet of paper which passes through a fuser to fix the print before the paper is placed facedown in an output tray, permitting the compact printer to create multi-page documents in sequence without manual re-sorting of the document, residual toner wiped from the vertically disposed belt to fall by gravity to a modular collection receptical.

US Patent:

48476609, Jul 11, 1989

Filed:

May 17, 1988

Appl. No.:

7/194815

Inventors:

Maurice S. Wheatley - Duluth GA
Danny L. Slayton - Lilburn GA

Assignee:

Colorocs Corporation - Norcross GA

International Classification:

G03G 1500

US Classification:

355244

Abstract:

A method and apparatus for controlling belt movement and separated image registration in a belt oriented full color double transfer electrophotographic print engine is disclosed. The photoreceptor and transfer belts have a ratio of lengths which is nominally equal to an integer. Independent servos control rotation of the belts driving each at a constant rotational period. The rotational periods are calculated so that their ratio is precisely equal to the above referenced integer value which is the nominal ratio of the belt lengths. A plurality of separated image creation and development control signals are provided under the control of an event timing clock. The event timing clock is preset to a predetermined modulo M value, M being the units of time for the targeted rotational period of the transfer belt, each time a reference pulse is provided from a reference station associated with the transfer belt indicating that a predetermined location on the transfer belt has arrived at the reference station. This temporally synchronizes image creation with the physical rotation of the transfer belt assuring proper registration of the images. Electrostatic binding forces between the photoreceptor and transfer belts are controlled by deposition of toner on the photoreceptor belt and selectively de-energizing a transfer corona when charged, non-image carrying, areas of the photoreceptor belt are in the transfer station.