Patents by Inventor Khosrow Lak
Khosrow Lak has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 5150158Abstract: An electrophotographic printing device having an arcuate photoconductive member (12) includes a flat screen member (32) that is spaced apart from the arcuate photoconductive member (12). A plurality of arcuate opaque lines are disposed on the screen member (32) such that the plurality of arcuate opaque lines are centered along the longitudinal axis thereof. Each of the lines is dimensioned such that it represents the mirror image of the shadow on the photoconductive member that would exist if a straight line were disposed on the screen at the same position.Type: GrantFiled: October 29, 1990Date of Patent: September 22, 1992Assignee: Colorocs CorporationInventors: Khosrow Lak, E. Neal Tompkins
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Patent number: 4989045Abstract: 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.Type: GrantFiled: May 1, 1989Date of Patent: January 29, 1991Assignee: Colorocs CorporationInventors: Danny L. Slayton, E. Neal Tompkins, Khosrow Lak, Charles S. Palm
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Patent number: 4848267Abstract: An improved toner module for use in an electrophotographic print engine. A decorator or developer roller with a rotatable core provides an apparatus for, and an improved method of, replacing developer. The decorator roller has a core that is partially magnetic and partially nonmagnetic. By rotating the decorator core to adjust the position of the non-magnetic portion of the decorator core, developer can be both removed and added without the use of any additional equipment. A mixing roller within the toner module provides for greater quantity of developer to be stored within the toner module. The disclosed toner module therefore has a greater capacity for storage of developer.Type: GrantFiled: March 23, 1987Date of Patent: July 18, 1989Assignee: Colorocs CorporationInventors: Danny L. Slayton, E. Neal Tompkins, Khosrow Lak, Charles S. Palm
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Patent number: 4806097Abstract: 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.Type: GrantFiled: March 15, 1988Date of Patent: February 21, 1989Assignee: Colorocs CorporationInventors: Charles S. Palm, Danny L. Slayton, Khosrow Lak, Peter F. Sampson, David R. Davis, Maurice S. Wheatley, Jr., Gregory A. Chatham, Wayne C. Jones, Kirk W. Charles, Anthony J. Ireland
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Patent number: 4705385Abstract: 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.Type: GrantFiled: November 10, 1986Date of Patent: November 10, 1987Assignee: Colorocs CorporationInventors: Charles S. Palm, Danny L. Slayton, Khosrow Lak, Peter F. Sampson, David R. Davis, Maurice S. Wheatley, Jr., Gregory A. Chatham, Wayne C. Jones, Kirk W. Charles, Anthony J. Ireland
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Patent number: 4699079Abstract: 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.Type: GrantFiled: November 19, 1986Date of Patent: October 13, 1987Assignee: Colorocs CorporationInventors: Charles S. Palm, Danny L. Slayton, Khosrow Lak, Peter F. Sampson, David R. Davis, Maurice S. Wheatley, Jr., Gregory A. Chatham, Wayne C. Jones, Kirk W. Charles, Anthony J. Ireland
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Patent number: 4697920Abstract: 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.Type: GrantFiled: November 10, 1986Date of Patent: October 6, 1987Assignee: Colorocs CorporationInventors: Charles S. Palm, Danny L. Slayton, Khosrow Lak, Peter F. Sampson, David R. Davis, Maurice S. Wheatley, Jr., Gregory A. Chatham, Wayne C. Jones, Kirk W. Charles, Anthony J. Ireland
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Patent number: 4652115Abstract: 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.Type: GrantFiled: October 25, 1985Date of Patent: March 24, 1987Assignee: Colorocs CorporationInventors: Charles S. Palm, Danny L. Slayton, Khosrow Lak, Peter F. Sampson, David R. Davis, Maurice S. Wheatley, Jr., Gregory A. Chatham, Wayne C. Jones, Kirk W. Charles, Anthony J. Ireland