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公开(公告)号：US20170315467A1
公开(公告)日：2017-11-02
申请号：US15245962
申请日：2016-08-24
Applicant: Lexmark International, Inc.
Inventor： Donn Duane Bryant , Geoffrey Kirk Carlson , Paul Douglas Horrall , Gary Scott Overall , Alan T. Pullins
IPC: G03G15/043
CPC classification number: G03G15/04036 , B41J2/44 , B41J2/442 , G03G15/04072 , G03G2215/0404 , G03G2221/0005 , G06K15/1204
Abstract: An electrophotographic imaging device, including at least one photoconductive member, a printhead unit, at least one shutter-wiper member, and at least one shutter actuator. The at least one shutter-wiper member is moveable in a first direction between a first position in which the shutter-wiper covers the at least one exit lens of the printhead unit and a second position in which the at least one shutter-wiper does not cover the at least one exit lens so as to allow the at least one light beam generated by the printhead unit to pass therethrough. The at least one actuator is coupled to the at least one shutter-wiper member such that movement of the at least one shutter actuator in a second direction substantially orthogonal to the first direction causes the corresponding shutter-wiper member to move in the first direction.
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Patent Agency Ranking
公开(公告)号：US10663891B1
公开(公告)日：2020-05-26
申请号：US16423351
申请日：2019-05-28
Applicant: LEXMARK INTERNATIONAL, INC.
Inventor： Marc Cousoulis , Gary Scott Overall
Abstract: A color imaging device includes a plurality of developer rolls with a common operating point, such as a common operating voltage. To determine the operating point, an acceptable range of color density is determined for each toner, the range being lighter and darker than an optimum color density for that toner. A search range is devised such that values within the range are examined relative to deviations from the optimum color density per each toner. The common operating point is selected as that having the lowest deviation per all toners. Also, if the common operating point corresponds to a color density darker than the acceptable range of color density for any toner, additional halftoning occurs compared to traditional halftoning, such as for continuous tones or solids. In this way, four color developer rolls can be operated from a single power supply, yet still provide acceptable color images.
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公开(公告)号：US10338496B2
公开(公告)日：2019-07-02
申请号：US15795565
申请日：2017-10-27
Applicant: LEXMARK INTERNATIONAL, INC.
Inventor： Douglas Anthony Able , Michael Brian Bacelieri , Andrew Gil Montaño Desabelle , Gary Scott Overall , Marvin Aliviado Rodriguez , Albert Ocianas Villanueva
Abstract: An electrophotographic imaging device having a method of printing which includes determining whether a duty cycle state in the imaging device has changed; selecting one of a full toner density calibration and a partial toner density calibration based on the determining; performing the one of the full toner density calibration and the partial toner density calibration; identifying a toner density to be applied during printing as a result of the performing; developing a toned image having a toner density equal to the toner density identified; and printing the toned image on a media sheet, wherein the full toner density calibration is skipped upon at least a determination that the duty cycle state has remained the same.
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公开(公告)号：US10248062B1
公开(公告)日：2019-04-02
申请号：US15795580
申请日：2017-10-27
Applicant: LEXMARK INTERNATIONAL, INC.
Inventor： Douglas Anthony Able , Michael Brian Bacalieri , Andrew Gil Montaño Desabelle , Gary Scott Overall , Marvin Aliviado Rodriguez
IPC: G03G15/00
Abstract: An electrophotographic imaging device having a method of printing which includes setting a default toner density for printing; developing a first toned image having the default toner density; printing the first toned image on a first page of a print job; and before printing a second page of a print job, determining whether a duty cycle state of a photoconductive member in the imaging device has changed, and upon a positive determination, developing a second toned image having a toner density derived from the default toner density and printing the second toned image on the second page.
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公开(公告)号：US10698339B1
公开(公告)日：2020-06-30
申请号：US16423335
申请日：2019-05-28
Applicant: LEXMARK INTERNATIONAL, INC.
Inventor： Marc Cousoulis , Gary Scott Overall
Abstract: A color imaging device includes a plurality of developer rolls with a common operating point, such as a common operating voltage. To determine the operating point, an acceptable range of color density is determined for each toner, the range being lighter and darker than an optimum color density for that toner. A search range is devised such that values within the range are examined relative to deviations from the optimum color density per each toner. The common operating point is selected as that having the lowest deviation per all toners. Also, if the common operating point corresponds to a color density darker than the acceptable range of color density for any toner, additional halftoning occurs compared to traditional halftoning, such as for continuous tones or solids. In this way, four color developer rolls can be operated from a single power supply, yet still provide acceptable color images.
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公开(公告)号：US09851654B2
公开(公告)日：2017-12-26
申请号：US15245962
申请日：2016-08-24
Applicant: Lexmark International, Inc.
Inventor： Donn Duane Bryant , Geoffrey Kirk Carlson , Paul Douglas Horrall , Gary Scott Overall , Alan T. Pullins
CPC classification number: G03G15/04036 , B41J2/44 , B41J2/442 , G03G15/04072 , G03G2215/0404 , G03G2221/0005 , G06K15/1204
Abstract: An electrophotographic imaging device, including at least one photoconductive member, a printhead unit, at least one shutter-wiper member, and at least one shutter actuator. The at least one shutter-wiper member is moveable in a first direction between a first position in which the shutter-wiper covers the at least one exit lens of the printhead unit and a second position in which the at least one shutter-wiper does not cover the at least one exit lens so as to allow the at least one light beam generated by the printhead unit to pass therethrough. The at least one actuator is coupled to the at least one shutter-wiper member such that movement of the at least one shutter actuator in a second direction substantially orthogonal to the first direction causes the corresponding shutter-wiper member to move in the first direction.
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