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1. 发明授权

US10102466B2 Magnetic keys having a plurality of magnet layers with holes 有权
公开(公告)号：US10102466B2
公开(公告)日：2018-10-16
申请号：US15378917
申请日：2016-12-14
申请人： Lexmark International, Inc.
发明人： Roger Steven Cannon , Gary Allen Denton , Graydon Randall Dodson , Keith Bryan Hardin
IPC分类号： G03G15/00 , G06K19/06 , G06K7/08
摘要： Magnetic keys having a plurality of magnetic layers having holes are disclosed. The location and orientation of the holes are controlled to generate magnetic fields that are of sufficient strength to be reliably read and sufficient complexity to be difficult to counterfeit. The magnetic keys are located on imaging-device supply items along with non-volatile memory devices containing measurements of the magnetic fields that are digitally signed. These supply items are difficult to counterfeit. Other devices are disclosed.

2. 发明申请

US20170104601A1 ELONGATED PHYSICAL UNCLONABLE FUNCTION 有权
公开(公告)号：US20170104601A1
公开(公告)日：2017-04-13
申请号：US15192177
申请日：2016-06-24
申请人： Lexmark International, Inc.
发明人： Gary Allen Denton , James Paul Drummond , Brian Anthony Reichert , Randal Scott Williamson
IPC分类号： H04L9/32
CPC分类号： H04L9/3278 , B41J2/17543 , B41J2/1755 , G03G15/0863 , G03G21/1875 , G03G2221/1823 , G09C1/00
摘要： An elongate physical unclonable function (PUF) is disclosed. The PUF has a longitudinal axis and contains a plurality of small magnetic particles. A much larger magnet is positioned on the longitudinal axis to indicate a home position. A low-cost linear translation mechanism may be used to read the PUF by referencing position information to the home position. Other devices are disclosed.

3. 发明申请

US20170104486A1 TOOTHED-RACK PHYSICAL UNCLONABLE FUNCTION 有权
公开(公告)号：US20170104486A1
公开(公告)日：2017-04-13
申请号：US15192399
申请日：2016-06-24
申请人： Lexmark International, Inc.
发明人： Gary Allen Denton , Randal Scott Williamson
IPC分类号： H03K19/003 , H04L9/32
CPC分类号： H03K19/003 , B41J2/17543 , B41J2/17546 , G03G21/1875 , G03G2215/0695 , G03G2221/1823 , G09C1/00 , H04L9/3278
摘要： A physical unclonable function (PUF) located on a supply item for an imaging device is disclosed. The PUF has a toothed rack configured to mate with a gear. During reading operations, the gear turns and translates the PUF linearly under a magnetic sensor. This configuration is inexpensive and robust. Other devices are disclosed.

4. 发明申请

US20170100862A1 Injection-Molded Physical Unclonable Function 审中-公开
公开(公告)号：US20170100862A1
公开(公告)日：2017-04-13
申请号：US15192139
申请日：2016-06-24
申请人： Lexmark International, Inc.
发明人： Gary Allen Denton , James Paul Drummond , Kelly Ann Killeen
IPC分类号： B29C45/00 , H03K19/003 , B29B13/02 , B29B13/08 , B29C45/18
CPC分类号： B29C45/0001 , B29B13/02 , B29B13/08 , B29C45/18 , B29K2101/10 , B29K2105/16 , B29K2505/12 , B29L2031/34 , G09C1/00 , H03K19/003 , H04L9/3278
摘要： A physical unclonable function formed by an injection molding machine is disclosed. A highly random distribution of magnetic particles is created by magnetizing magnetizable particles before feeding the particles into the injection molding machine due to turbulence within the injection molding machine. Plastic is also fed into the injection molding machine to suspend the particles. Other devices and processes are disclosed.

5. 发明授权

US09608828B1 Elongated physical unclonable function 有权
公开(公告)号：US09608828B1
公开(公告)日：2017-03-28
申请号：US15192177
申请日：2016-06-24
申请人： Lexmark International, Inc.
发明人： Gary Allen Denton , James Paul Drummond , Brian Anthony Reichert , Randal Scott Williamson
IPC分类号： G03G21/00 , H04L9/32 , G03G15/08 , B41J2/175 , G03G21/18
CPC分类号： H04L9/3278 , B41J2/17543 , B41J2/1755 , G03G15/0863 , G03G21/1875 , G03G2221/1823 , G09C1/00
摘要： An elongate physical unclonable function (PUF) is disclosed. The PUF has a longitudinal axis and contains a plurality of small magnetic particles. A much larger magnet is positioned on the longitudinal axis to indicate a home position. A low-cost linear translation mechanism may be used to read the PUF by referencing position information to the home position. Other devices are disclosed.

6. 发明申请

US20160154343A1 Magnetic Roll for a Dual Component Development Electrophotographic Image Forming Device 有权
标题翻译：用于双组分显影电子照相成像装置的磁辊
公开(公告)号：US20160154343A1
公开(公告)日：2016-06-02
申请号：US14556291
申请日：2014-12-01
申请人： Lexmark International, Inc.
发明人： Gary Allen Denton , Katherine Marie Gilliam , Elliott Vincent Jernigan , Courtney Harrison Soale
IPC分类号： G03G15/09
CPC分类号： G03G15/0928 , G03G15/0818
摘要： An outer sleeve of a magnetic roll for a dual component development electrophotographic image forming device according to one example embodiment includes a series of grooves in an outer surface of the outer sleeve. The grooves extend along an axial length of the sleeve and are spaced circumferentially from each other around the outer sleeve. The outer sleeve has a diameter of between 15 mm and 30 mm, inclusive. The grooves are present on the outer surface of the outer sleeve at a groove density of at least 1.91 grooves/mm of the circumference of the outer surface of the outer sleeve and a total indicated runout of the outer sleeve is 0.05 mm or less.
摘要翻译：根据一个示例性实施例的用于双组分显影电子照相图像形成装置的磁性辊的外套筒包括在外套筒的外表面中的一系列凹槽。凹槽沿着套筒的轴向长度延伸并且围绕外套筒彼此周向间隔开。外套筒的直径在15毫米至30毫米之间（含）。凹槽以外套筒外表面的圆周的至少1.91个凹槽/ mm的凹槽密度存在于外套筒的外表面上，并且外套筒的总指示跳动为0.05mm或更小。

7. 发明授权

US09280094B1 Trim bar entry geometry for a dual component development electrophotographic image forming device 有权
标题翻译：用于双组分显影电子照相图像形成装置的修剪条条形几何形状
公开(公告)号：US09280094B1
公开(公告)日：2016-03-08
申请号：US14618172
申请日：2015-02-10
申请人： Lexmark International, Inc.
发明人： Michael Brian Bacelieri , Robert Dan Bennett, III , Gary Allen Denton , Katherine Marie Gilliam , Elliott Vincent Jernigan , Matthew Lee Rogers , Dominique Renee Rowe , Courtney Harrison Soale
IPC分类号： G03G15/09 , G03G15/08
CPC分类号： G03G15/0928 , G03G15/0812 , G03G15/0891
摘要： A developer unit for a dual component development electrophotographic image forming device according to one example embodiment includes a housing having a reservoir for storing a developer mix that includes toner and magnetic carrier beads. An auger is positioned to convey developer mix in the reservoir toward the outer surface of a magnetic roll on a front of the housing. A ledge on an inner surface of the housing extends axially with respect to the magnetic roll along a front of the reservoir. The ledge is positioned upstream from a trim bar and downstream from a pickup pole of the magnetic roll with respect to the operative rotational direction of the magnetic roll. The ledge has a concave curved inner surface that is open to the reservoir and extends from near the trim bar to near a front side of the auger.
摘要翻译：根据一个示例性实施例的用于双组分显影电子照相图像形成装置的显影剂单元包括具有用于存储包括调色剂和磁性载体珠的显影剂混合物的储存器的壳体。螺旋钻定位成将储存器中的显影剂混合物传送到壳体前部的磁性辊的外表面。壳体内表面上的凸缘沿储存器的前部相对于磁辊轴向延伸。凸缘相对于磁辊的操作旋转方向位于微调杆的上游并且位于磁辊的拾取极的下游。该凸缘具有凹形弯曲的内表面，该内表面对储存器开放并且从修剪条附近延伸到靠近螺旋钻的前侧。

8. 发明申请

US20150071686A1 Method and Apparatus for Magnetic Brush Retraction in Electrophotographic System 有权
标题翻译：电子照相系统中磁刷回缩的方法和装置
公开(公告)号：US20150071686A1
公开(公告)日：2015-03-12
申请号：US14021322
申请日：2013-09-09
申请人： Lexmark International, Inc.
发明人： Alan Stirling Campbell , Gary Allen Denton
IPC分类号： G03G15/09
CPC分类号： G03G15/0921
摘要： A method and apparatus for retracting a magnetic brush in an imaging device. The apparatus includes a housing containing carrier beads and toner particles; a magnetic structure at least partly disposed within the housing and generating at least one magnetic field; and an endless sleeve disposed around and rotatable about the magnetic structure, at least a portion of the sleeve extending from the housing. During toner development, the magnetic structure is in a first position for developing a magnetic brush of the carrier beads and toner particles along the portion of the sleeve extending from the housing which forms a developer nip with a photoconductor, and during a period of time when toner development is not to be performed, the magnetic structure is in a second position for retracting the magnetic to brush by causing the carrier beads to be positioned against the portion of the endless sleeve extending from the housing forming the developer nip.
摘要翻译：一种用于缩回成像装置中的磁刷的方法和装置。该装置包括：容纳载体珠和调色剂颗粒的壳体; 至少部分地设置在壳体内并产生至少一个磁场的磁结构; 以及设置在所述磁性结构周围并围绕所述磁性结构旋转的环形套筒，所述套筒的至少一部分从所述壳体延伸。在调色剂显影期间，磁性结构处于第一位置，用于沿着从壳体延伸的套筒的部分显影载体珠的磁刷和调色剂颗粒，所述壳体与感光体形成显影剂压区，并且在一段时间期间不要进行调色剂显影，磁性结构处于第二位置，用于通过使载体珠抵靠从形成显影剂压区的壳体延伸的环形套筒的部分定位而使磁刷回缩。

9. 发明授权

US11381406B2 Injection-molded physical unclonable function 有权
公开(公告)号：US11381406B2
公开(公告)日：2022-07-05
申请号：US17114604
申请日：2020-12-08
申请人： LEXMARK INTERNATIONAL, INC.
发明人： Gary Allen Denton , James Paul Drummond , Kelly Ann Killeen
IPC分类号： H04L9/32 , B29C45/18 , H03K19/003 , G09C1/00 , B29C45/00 , G06V20/80 , B29K105/16 , B29K101/10 , B29K505/12
摘要： A physical unclonable function is disclosed. A highly random distribution of magnetic particles within a thermoplastic polymer is created by magnetizing magnetizable particles in solid pellet feed material before feeding the solid pellets into an injection molding machine. Other devices and processes are disclosed.

10. 发明申请

US20210203514A1 Injection-Molded Physical Unclonable Function 有权
公开(公告)号：US20210203514A1
公开(公告)日：2021-07-01
申请号：US17189177
申请日：2021-03-01
申请人： Lexmark International, Inc.
发明人： Gary Allen Denton , James Paul Drummond , Kelly Ann Killeen
IPC分类号： H04L9/32 , B29C45/18 , H03K19/003 , G09C1/00 , G06K9/00 , B29C45/00
摘要： A physical unclonable function is disclosed. A highly random distribution of magnetic particles within a thermoplastic polymer is created by magnetizing magnetizable particles in solid pellet feed material before feeding the solid pellets into an injection molding machine. Other devices and processes are disclosed.

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