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公开(公告)号：US09037018B1
公开(公告)日：2015-05-19
申请号：US14179838
申请日：2014-02-13
Applicant: Lexmark International, Inc.
Inventor： Marc Cousoulis , Courtney Harrison Soale
CPC classification number: G03G15/0907 , G03G15/5041 , G03G15/5058 , G03G15/556 , G03G15/80
Abstract: A method of controlling toner concentration in an image forming device by determining a charge per unit mass of toner in a mixture of toner and carrier and adding toner to the mixture if the charge per unit mass of the toner is higher than a predetermined threshold. Other methods and devices are disclosed.
Abstract translation: 一种通过确定调色剂和载体的混合物中的每单位质量的调色剂的电荷并且如果每单位质量的调色剂的电荷高于预定阈值，则向混合物中加入调色剂来控制图像形成装置中的调色剂浓度的方法。 公开了其它方法和装置。
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公开(公告)号：US09541876B1
公开(公告)日：2017-01-10
申请号：US14866339
申请日：2015-09-25
Applicant: Lexmark International, Inc.
Inventor： Marc Cousoulis , Alexander Johannes Geyling , Calvin Dale Murphy , Niko Jay Murrell , William Claiborne Ryle , Travis Alan Riggs , Edward Alan Rush
IPC: G03G15/00
CPC classification number: G03G15/5058 , G03G15/161 , G03G15/5041 , G03G15/5054 , G03G15/55 , G03G15/556
Abstract: A method and system are disclosed for detecting a fatal error condition in a printing device having an intermediate transfer member for facilitating toner transfer, including sensing a reflectance value of the intermediate transfer member at a first predetermined time; comparing the sensed reflectance value at the first period of time to a predetermined threshold; sensing a reflectance value of the intermediate transfer member at a second predetermined time after the predetermined first time; and comparing the sensed reflectance value of the intermediate transfer member at the second period of time to the predetermined threshold. If each of the sensed reflectance value at the first predetermined time and the sensed reflectance value at the second predetermined time is greater than the predetermined threshold, the method includes selectively suspending further printing operations until the imaging device is serviced.
Abstract translation: 公开了一种用于检测具有用于促进调色剂转印的中间转印部件的打印装置中的致命错误状况的方法和系统，包括在第一预定时间检测中间转印部件的反射率值; 将所述第一时间段的感测反射率值与预定阈值进行比较; 在预定的第一时间之后的第二预定时间感测中间转印部件的反射率值; 以及将所述第二时间段的所述中间转印部件的感测反射率值与所述预定阈值进行比较。 如果在第一预定时间的感测反射率值和第二预定时间的感测反射率值中的每一个都大于预定阈值，则该方法包括选择性地暂停进一步的打印操作，直到成像设备被维护为止。
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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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Patent Agency Ranking
公开(公告)号：US10120324B2
公开(公告)日：2018-11-06
申请号：US15371411
申请日：2016-12-07
Applicant: LEXMARK INTERNATIONAL, INC.
Inventor： Michael Brian Bacelieri , Marc Cousoulis
IPC: G03G21/00
Abstract: An imaging device has a photoconductive drum with a surface that is selectively discharged to create a latent electrostatic image for attracting toner for transfer to a media moving in a process direction. The image is divided into multiple segments along the process direction and discharged pixels per segment are counted. An accumulator keeps track of the numbers of pixels per revolutions of a roller that applies the toner to the drum. Upon meeting a predetermined deficiency in the counts of pixels in any given segment, an artificial image gets generated on the surface of the photoconductive drum that supplies the missing pixels, per segment. The image gets developed with toner, but does not transfer to the media. Lubrication occurs on the surface of the drum and each segment retains a relatively common number of imaging pixels that get developed over time.
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公开(公告)号：US09910395B2
公开(公告)日：2018-03-06
申请号：US15213494
申请日：2016-07-19
Applicant: Lexmark International, Inc.
Inventor： Marc Cousoulis , Courtney Harrison Soale
CPC classification number: G03G15/556 , G03G15/065 , G03G15/0907 , G03G15/1605 , G03G15/1675 , G03G15/5041
Abstract: A method of controlling toner development during a life of an imaging unit in an image forming device by determining whether an end of life of the imaging unit has been reached and upon a positive determination, performing at least one of incrementally lowering a target toner mass to be measured by a toner patch sensor and incrementally reducing the magnitude of voltage biases applied to at least one of the magnetic roll and the charging roll of the imaging forming device. Performing the acts of incrementally lowering and reducing are repeated until the imaging unit is replaced. The method reduces the risk of damage to the image forming device due to carrier bead development while allowing for printing to occur.
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公开(公告)号：US20180024487A1
公开(公告)日：2018-01-25
申请号：US15213494
申请日：2016-07-19
Applicant: Lexmark International, Inc.
Inventor： Marc Cousoulis , Courtney Harrison Soale
IPC: G03G15/08
CPC classification number: G03G15/556 , G03G15/065 , G03G15/0907 , G03G15/1605 , G03G15/1675 , G03G15/5041
Abstract: A method of controlling toner development during a life of an imaging unit in an image forming device by determining whether an end of life of the imaging unit has been reached and upon a positive determination, performing at least one of incrementally lowering a target toner mass to be measured by a toner patch sensor and incrementally reducing the magnitude of voltage biases applied to at least one of the magnetic roll and the charging roll of the imaging forming device. Performing the acts of incrementally lowering and reducing are repeated until the imaging unit is replaced. The method reduces the risk of damage to the image forming device due to carrier bead development while allowing for printing to occur.
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公开(公告)号：US12282267B2
公开(公告)日：2025-04-22
申请号：US18092368
申请日：2023-01-02
Applicant: LEXMARK INTERNATIONAL, INC.
Inventor： Marc Cousoulis , Michael Charles Day , Kweku Korsah , Jared Kouhui Lin , David William Shuman , Matthew Russell Smither
IPC: G03G15/08 , G03G15/00 , G03G15/02 , G03G15/043
Abstract: An imaging device has a developer roll to provide toner to a photoconductive drum to develop a latent image on the drum for direct transfer to media or an intermediate transfer member. A power supply in communication with a controller sets relative voltages on the developer roll and drum. During transfer of the toner, the imaging device determines a current between the developer roll and drum. In turn, the controller determines a charge and mass of the toner for setting with the power supply an operating voltage on the drum or developer roll. Preventing and reporting toners with insufficient charge are other embodiments.
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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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