公开(公告)号：US5740492A

公开(公告)日：1998-04-14

申请号：US652159

申请日：1996-05-23

申请人： Tsuyoshi Deki ,  Takahiro Tamiya ,  Koichi Irie

发明人： Tsuyoshi Deki ,  Takahiro Tamiya ,  Koichi Irie

IPC分类号： G03G15/01 ,  G03G15/16

CPC分类号： G03G15/0131 ,  G03G2215/0177

摘要： A color image forming apparatus is provided with an intermediate transfer belt to transfer thereupon an image of each of a plurality of colors carried on a photoconductive member, sequentially superposing one image on top of another, to form a full color image, and to further transfer the full color image to a copysheet. The intermediate transfer belt is passed over supporting rollers and a plurality of marks are printed on the intermediate transfer belt for indicating a position on the belt. A detector is provided for detecting the marks on the belt to generate a detect signal to start an image forming operation for each of the colors. The detector is controlled to start detection of a mark when a predetermined length of time is elapsed after a start or a termination of an operation of a driving element of the apparatus. The detector is provided at a position facing one of the support rollers around which the intermediate transfer belt is passed. A distance between the adjoining marks is equal to an integral multiple of at least one of a circumference of the roller the detector faces. The provision of an improved color image forming apparatus realizes a capability of accomplishing an accurate image registration for each of the plurality of colors.

摘要翻译： 彩色图像形成装置设置有中间转印带，在其上传送承载在感光体上的多种颜色中的每一种的图像，顺序地将一幅图像重叠在一起，形成全色图像，并进一步转印 全彩色图像到一张复印件。 中间转印带通过支撑辊，并且多个标记印刷在中间转印带上以指示带上的位置。 提供了一种用于检测皮带上的标记以产生检测信号的检测器，以开始针对每种颜色的图像形成操作。 控制检测器，以便在设备的驱动元件的操作开始或终止之后经过预定时间长度时开始检测标记。 检测器设置在面向中间转印带通过的一个支撑辊的位置。 相邻标记之间的距离等于检测器面对的辊的周长中的至少一个的整数倍。 提供改进的彩色图像形成装置实现了对于多种颜色中的每一种实现精确图像配准的能力。

公开(公告)号：US06184910B2

公开(公告)日：2001-02-06

申请号：US08418300

申请日：1995-04-07

申请人： Eiichi Sasaki ,  Tsuyoshi Deki ,  Nobuo Iwata ,  Takeshi Motohashi ,  Takahiro Tamiya ,  Yutaka Shio ,  Tomonori Yabuta

发明人： Eiichi Sasaki ,  Tsuyoshi Deki ,  Nobuo Iwata ,  Takeshi Motohashi ,  Takahiro Tamiya ,  Yutaka Shio ,  Tomonori Yabuta

IPC分类号： B41J2385

CPC分类号： G06K15/129 ,  B41J2/471 ,  G06K15/1219

摘要： A color image forming apparatus capable of superposing toner images of respective colors in accurate register by preventing an exposing position from being displaced in the subscanning direction. The rotation phase of a polygonal mirror is controlled on the basis of the mark detection timing of a mark sensor. Hence, the exposing position in the subscanning direction is prevented from being displaced without regard to irregularities in the circumferential length and feed speed of an intermediate image transfer belt.

摘要翻译： 一种彩色图像形成装置，其能够通过防止曝光位置在副扫描方向上移位而将精度寄存器中的各种颜色的调色剂图像叠加。 基于标记传感器的标记检测定时来控制多面镜的旋转相位。 因此，不考虑中间图像转印带的周长和进给速度的不规则性，防止副扫描方向上的曝光位置被移位。

公开(公告)号：US5678161A

公开(公告)日：1997-10-14

申请号：US595340

申请日：1996-02-01

申请人： Shigeo Kurotaka ,  Nobuo Iwata ,  Shingo Katou ,  Takeshi Motohashi ,  Tsuyoshi Deki ,  Takahiro Tamiya ,  Tomonori Yabuta

发明人： Shigeo Kurotaka ,  Nobuo Iwata ,  Shingo Katou ,  Takeshi Motohashi ,  Tsuyoshi Deki ,  Takahiro Tamiya ,  Tomonori Yabuta

IPC分类号： B65H29/52 ,  G03G15/00 ,  G03G15/16 ,  G03G15/20

CPC分类号： G03G15/657 ,  G03G15/2028

摘要： In a paper conveyer of an image forming apparatus, a transfer operation is performed by a transfer roller and an unfixed image in the transfer operation is carried onto the lower side of a transfer paper sheet. The transfer paper sheet is conveyed to a fixing device constructed by a fixing roller and a pressurizing roller. A hardness of the fixing roller is smaller than that of the pressurizing roller, while a nipping portion of the fixing and pressurizing rollers is formed in a concave shape. The fixing and pressurizing rollers are arranged such that a nipping inlet port point of the fixing and pressurizing rollers is located in the vicinity of a line of a conveying locus of a thin transfer paper sheet. A paper guide plate guides the transfer paper sheet to the nipping inlet port. In this construction, a transferred paper sheet is conveyed such that this transferred paper sheet is reliably fed into the nipping portion of the fixing device, and it is possible to prevent an image rub, wrinkles, a jam, etc. from being caused.

摘要翻译： 在图像形成装置的纸输送机中，通过转印辊进行转印操作，并且转印操作中的未定影图像被承载在转印纸的下侧。 转印纸被输送到由定影辊和加压辊构成的定影装置。 定影辊的硬度小于加压辊的硬度，而固定和加压辊的夹持部分形成为凹形。 固定和加压辊布置成使得固定和加压辊的夹入入口点位于薄转印纸的输送轨迹的线附近。 导纸板将转印纸引导到夹持入口。 在这种结构中，转印的纸张被输送，使得该转印的纸张被可靠地进给到定影装置的夹持部分中，并且可以防止产生图像摩擦，皱纹，果酱等。

公开(公告)号：US5599645A

公开(公告)日：1997-02-04

申请号：US439139

申请日：1995-05-11

申请人： Takahiro Tamiya ,  Nobuo Iwata ,  Tsuyoshi Deki ,  Takeshi Motohashi

发明人： Takahiro Tamiya ,  Nobuo Iwata ,  Tsuyoshi Deki ,  Takeshi Motohashi

IPC分类号： G03G15/01 ,  G03G15/16 ,  G03G13/16

CPC分类号： G03G15/1605 ,  G03G15/0131

摘要： In an image forming apparatus of the type sequentially forming powder images of different colors on an image carrier, and sequentially transferring them to an acceptor one above the other (primary transfer), an image transfer method is disclosed which prevents transfer dust from being transferred to the acceptor at the time of the primary transfer. During the primary transfer, a bias potential V.sub.1 is applied to one of two conductors located at an upstream side. The potential V.sub.1 has the same polarity as the charged powder carried on the image carrier. A potential V.sub.2 is applied to the other conductor at a downstream side and provided with a polarity opposite to the polarity of the charged powder. Every time the primary transfer is repeated, the potentials V.sub.l and V.sub.2 are respectively sequentially shifted toward the polarity of the powder and toward the polarity opposite to the polarity of the powder.

摘要翻译： 在图像载体上顺序地形成不同颜色的粉末图像并依次将它们转移到另一个（一次转印）的受主的图像形成装置中，公开了一种图像转印方法，其防止转印灰尘转移到 受理人在一次转让时。 在一次传送期间，将偏置电位V1施加到位于上游侧的两个导体之一。 电位V1具有与载带在载体上的带电粉末相同的极性。 电位V2在下游侧施加到另一个导体，并且具有与带电粉末的极性相反的极性。 每次重复一次转印时，电位V1和V2分别依次朝向粉末的极性移动并朝向与粉末的极性相反的极性。

公开(公告)号：US20090074482A1

公开(公告)日：2009-03-19

申请号：US12204071

申请日：2008-09-04

申请人： Hajime Oyama ,  Katsuhiro Echigo ,  Takahiro Tamiya

发明人： Hajime Oyama ,  Katsuhiro Echigo ,  Takahiro Tamiya

IPC分类号： G03G15/20

CPC分类号： G03G15/161 ,  G03G15/1605 ,  G03G2215/1623

摘要： An intermediate transfer belt and a photosensitive member form a transfer nip. An electrode is arranged close to an inner surface of the intermediate transfer belt in a portion on an upstream side of a direction of endless movement of the intermediate transfer belt with respect to a downstream-side exit of the transfer nip and on a downstream side of the direction of endless movement with respect to a position at which a transfer roller charges the intermediate transfer belt. A voltage of same polarity as the polarity of a toner is applied to the electrode, so that there is no movement of an electric charge between the electrode and the intermediate transfer belt.

摘要翻译： 中间转印带和感光部件形成转印辊隙。 电极靠近中间转印带的内表面设置在中间转印带相对于转印辊隙的下游侧出口的环形运动方向的上游侧的一部分中，并且在下游侧 相对于转印辊对中间转印带进行充电的位置的无端运动的方向。 向电极施加与调色剂的极性相同极性的电压，使得电极和中间转印带之间不会发生电荷的移动。

公开(公告)号：US08121527B2

公开(公告)日：2012-02-21

申请号：US12034275

申请日：2008-02-20

申请人： Hajime Oyama ,  Katsuhiro Echigo ,  Takahiro Tamiya

发明人： Hajime Oyama ,  Katsuhiro Echigo ,  Takahiro Tamiya

IPC分类号： G03G15/20

CPC分类号： G03G15/162 ,  G03G15/161 ,  G03G15/1675

摘要： An exit blade is arranged on a downstream side of a transfer nip formed between a photosensitive element and a primary transfer roller, with an intermediate transfer belt being put therebetween, and brought into contact with an internal surface of the intermediate transfer belt. A neutralizing bias of the same polarity as that of the toner is applied to the exit blade, rather than a primary transfer bias voltage.

摘要翻译： 出口叶片布置在形成在感光元件和一次转印辊之间的转印辊隙的下游侧，中间转印带放置在其间并与中间转印带的内表面接触。 将与调色剂相同极性的中和偏压施加到出口叶片，而不是一次转印偏压。

公开(公告)号：US20090324306A1

公开(公告)日：2009-12-31

申请号：US12487216

申请日：2009-06-18

申请人： Katsuhiro Echigo ,  Hajime Oyama ,  Takahiro Tamiya

发明人： Katsuhiro Echigo ,  Hajime Oyama ,  Takahiro Tamiya

IPC分类号： G03G15/16

CPC分类号： G03G15/1605 ,  G03G2215/1623

摘要： A transfer device for use in an image forming apparatus includes at least two belt members constituting a secondary nip portion therebetween. The transfer device electrostatically transfers a toner image from one of the belt members onto a recording medium when the recording medium passes through the secondary nip portion. The transfer device includes a mechanism that supports the belt members such that the secondary nip portion is substantially linear; and a bias applying member that applies a secondary transfer bias at a substantially center portion of the secondary nip portion.

摘要翻译： 用于图像形成装置的转印装置包括在其间构成二次压合部的至少两个带部件。 当记录介质通过次级辊隙部分时，转印装置将调色剂图像从其中一个带部件静电转印到记录介质上。 传送装置包括支撑带部件的机构，使得二次压合部分基本上是线性的; 以及施加二次转印偏压在二次压合部的大致中心部分的偏压施加部件。

公开(公告)号：US08081913B2

公开(公告)日：2011-12-20

申请号：US12204071

申请日：2008-09-04

申请人： Hajime Oyama ,  Katsuhiro Echigo ,  Takahiro Tamiya

发明人： Hajime Oyama ,  Katsuhiro Echigo ,  Takahiro Tamiya

IPC分类号： G03G15/20

CPC分类号： G03G15/161 ,  G03G15/1605 ,  G03G2215/1623

摘要： An intermediate transfer belt and a photosensitive member form a transfer nip. An electrode is arranged close to an inner surface of the intermediate transfer belt in a portion on an upstream side of a direction of endless movement of the intermediate transfer belt with respect to a downstream-side exit of the transfer nip and on a downstream side of the direction of endless movement with respect to a position at which a transfer roller charges the intermediate transfer belt. A voltage of same polarity as the polarity of a toner is applied to the electrode, so that there is no movement of an electric charge between the electrode and the intermediate transfer belt.

摘要翻译： 中间转印带和感光部件形成转印辊隙。 电极靠近中间转印带的内表面设置在中间转印带相对于转印辊隙的下游侧出口的环形运动方向的上游侧的一部分中，并且在下游侧 相对于转印辊对中间转印带进行充电的位置的无端运动的方向。 向电极施加与调色剂的极性相同极性的电压，使得电极和中间转印带之间不会发生电荷的移动。

公开(公告)号：US20070217832A1

公开(公告)日：2007-09-20

申请号：US11687360

申请日：2007-03-16

申请人： Hajime Oyama ,  Katsuhiro Echigo ,  Takahiro Tamiya

发明人： Hajime Oyama ,  Katsuhiro Echigo ,  Takahiro Tamiya

IPC分类号： G03G15/01 ,  G03G15/16

CPC分类号： G03G15/1635 ,  G03G15/1605 ,  G03G15/161 ,  G03G2215/0129 ,  G03G2215/1623 ,  G03G2221/1642

摘要： An image forming apparatus includes at least one image forming unit, a primary transfer belt, and a secondary transferer. The image forming unit includes an image carrier and a primary transfer bias applicator. The secondary transferer includes a secondary transfer nip, a secondary transfer bias applicator, and a facing member facing the second transfer bias applicator. The secondary transfer bias applicator forms a secondary transfer electric field. The image forming apparatus further includes a bias applicator, a contact start site, and an electrode. The bias applicator applies a bias voltage having a same polarity as the normal charge polarity of the toner to the primary transfer belt, downstream of the primary transfer bias applicator. The recording medium starts to contact the toner image at the contact start site, located upstream of the secondary transfer nip, where the electrode forms an electric field.

摘要翻译： 图像形成装置包括至少一个图像形成单元，一次转印带和次要转印件。 图像形成单元包括图像载体和一次转印偏压施加器。 次级转移器包括二次转印压区，二次转印偏压施加器和面向第二转印偏压施加器的面对构件。 二次转印偏压施加器形成二次转印电场。 图像形成装置还包括偏置施加器，接触起始部位和电极。 偏置施加器将与调色剂的正常电荷极性相同的极性的偏置电压施加到一次转印偏压施加器的下游的一次转印带。 记录介质开始接触位于二次转印辊隙的上游的接触起始位置处的调色剂图像，其中电极形成电场。

公开(公告)号：US20060209151A1

公开(公告)日：2006-09-21

申请号：US11367541

申请日：2006-03-06

申请人： Takahiro Tamiya ,  Katsuhiro Echigo ,  Hajime Oyama ,  Hisashi Kikuchi

发明人： Takahiro Tamiya ,  Katsuhiro Echigo ,  Hajime Oyama ,  Hisashi Kikuchi

IPC分类号： B41J2/01

CPC分类号： B41J2/0057

摘要： A transfer member and a downstream-side neutralizing electrode make a contact with a rear portion of an intermediate transfer belt within a contact region. A transfer voltage with an opposite polarity to a regularly charged polarity of a toner is applied to the transfer member. A voltage with a same polarity as the regularly charged polarity of the toner is applied to the downstream-side neutralizing electrode.

摘要翻译： 转印部件和下游侧中和电极与接触区域内的中间转印带的后部接触。 将具有与调色剂的规则带电极性相反的极性的转印电压施加到转印部件。 具有与调色剂的规则带电极性相同极性的电压被施加到下游侧中和电极。