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公开(公告)号：US10591862B1
公开(公告)日：2020-03-17
申请号：US16248192
申请日：2019-01-15
Applicant: Lexmark International, Inc.
Inventor： Douglas Anthony Able , Kevin Dean Schoedinger
Abstract: An imaging system having methods for reducing churn in an imaging device which includes identifying a number of unproductive revolutions made in a print engine of the imaging device, determining whether the number of unproductive revolutions exceeds a predetermined threshold, and performing at least one of: using a predetermined speed limit when printing a page and disabling a function in the imaging device upon the determination that the number of unproductive revolutions exceeds the predetermined threshold.
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公开(公告)号：US10809641B1
公开(公告)日：2020-10-20
申请号：US16518215
申请日：2019-07-22
Applicant: LEXMARK INTERNATIONAL, INC.
Inventor： Douglas Anthony Able , Andrew Pryse Dale , Jared Kuohui Lin , Matthew David Heid , Christopher David Strack
Abstract: An imaging device includes a photoconductive drum charged by a charge roll and opposed by developer roll. The developer roll adds toner to the drum to develop a latent image on the drum for transfer to media or an intermediate transfer member at a transfer roll. One or more high voltage power supplies communicate with a controller to set voltages on the rolls. During times of non-imaging, but rotation of the drum, the charge roll charges the drum to less than a Paschen breakdown voltage of the drum. A voltage of the transfer roll is determined that corresponds to a temperature and relative humidity of an operating environment of the imaging device and the developer roll is charged based thereon. The charge of the transfer roll is set close to the charge of the drum, but higher in magnitude. A laser may also discharge the drum.
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Patent Agency Ranking
公开(公告)号：US10579003B1
公开(公告)日：2020-03-03
申请号：US16418113
申请日：2019-05-21
Applicant: LEXMARK INTERNATIONAL, INC.
Inventor： Michael Brian Bacelieri , Douglas Anthony Able , Andrew Pryse Dale , Jared Kuohui Lin , Robert Watson McAlpine , Matthew Russell Smither
Abstract: An imaging device includes a photoconductive drum charged by a charge roll and opposed by a transfer roll to transfer an image from the drum. The drum becomes biased to a negative voltage by setting charges of negative voltage on both the charge roll and transfer roll. A controller switches the bias of the transfer roll to a positive voltage from the negative voltage and a delta or difference in a charge of the drum is determined from before and after the switching. Based on the delta, the voltage on the charge roll is boosted by a boost voltage to improve the charge on the drum. In this way, deteriorating or defective charge rolls can be still used to charge the drum to a proper voltage for imaging. Techniques for determining the delta, the boost and the magnitude of voltage charges are further embodiments.
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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：US20150103115A1
公开(公告)日：2015-04-16
申请号：US14514101
申请日：2014-10-14
Applicant: Lexmark International Inc.
Inventor： Douglas Anthony Able , David J. Mickan , Kevin Dean Schoedinger
IPC: B41J13/00
CPC classification number: B41J13/0027 , G03G15/6564
Abstract: A method and apparatus for handling a time based error condition in an imaging apparatus. The method includes transporting a first media sheet from the media input tray towards the transfer nip of the imaging apparatus; and determining, when the first media sheet reaches a predetermined point in the media path, whether the print engine of the imaging apparatus is ready to transfer a first image of the plurality of images to the media sheet at the transfer nip. Upon a determination that the print engine is not ready, the first media sheet is transported through the transfer nip without transferring the first image thereto, until the first media sheet is placed in the output area, and a second media sheet is transported to the transfer nip, a first image is transferred to the second media sheet and the second media to sheet is transported to the output area.
Abstract translation: 一种用于在成像设备中处理基于时间的错误状况的方法和装置。 该方法包括将第一介质片材从介质输入盘传送到成像装置的转印辊隙; 以及当所述第一介质片材到达所述介质路径中的预定点时，确定所述成像设备的打印引擎是否准备好将所述多个图像的第一图像在所述转印辊隙处传送到所述介质片材。 在确定打印引擎未准备好的情况下，第一介质片材通过传送辊隙传送，而不将第一图像传送到其中，直到第一介质片材被放置在输出区域中，并且第二介质片材被传送到传送 第一图像被传送到第二介质片，并且第二媒体到片材被传送到输出区域。
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公开(公告)号：US08985729B1
公开(公告)日：2015-03-24
申请号：US14514101
申请日：2014-10-14
Applicant: Lexmark International Inc.
Inventor： Douglas Anthony Able , David J Mickan , Kevin Dean Schoedinger
CPC classification number: B41J13/0027 , G03G15/6564
Abstract: A method and apparatus for handling a time based error condition in an imaging apparatus. The method includes transporting a first media sheet from the media input tray towards the transfer nip of the imaging apparatus; and determining, when the first media sheet reaches a predetermined point in the media path, whether the print engine of the imaging apparatus is ready to transfer a first image of the plurality of images to the media sheet at the transfer nip. Upon a determination that the print engine is not ready, the first media sheet is transported through the transfer nip without transferring the first image thereto, until the first media sheet is placed in the output area, and a second media sheet is transported to the transfer nip, a first image is transferred to the second media sheet and the second media sheet is transported to the output area.
Abstract translation: 一种用于在成像设备中处理基于时间的错误状况的方法和装置。 该方法包括将第一介质片材从介质输入盘传送到成像装置的转印辊隙; 以及当所述第一介质片材到达所述介质路径中的预定点时，确定所述成像设备的打印引擎是否准备好将所述多个图像的第一图像在所述转印辊隙处传送到所述介质片材。 在确定打印引擎未准备好的情况下，第一介质片材通过传送辊隙传送，而不将第一图像传送到其中，直到第一介质片材被放置在输出区域中，并且第二介质片材被传送到传送 第一图像被转移到第二介质片，并且第二介质片材被传送到输出区域。
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