公开(公告)号：US10281848B2

公开(公告)日：2019-05-07

申请号：US15427735

申请日：2017-02-08

Applicant: Yuuji Wada ,  Naoto Kochi ,  Hiroki Nakamatsu ,  Kazuki Yogosawa ,  Takahiro Suzuki ,  Shinya Tanaka ,  Kenji Sugiura ,  Naohiro Kumagai ,  Seiichi Kogure ,  Junpei Fujita ,  Hirokazu Ishii ,  Takehide Mizutani ,  Atsushi Nagata ,  Keigo Nakamura

Inventor： Yuuji Wada ,  Naoto Kochi ,  Hiroki Nakamatsu ,  Kazuki Yogosawa ,  Takahiro Suzuki ,  Shinya Tanaka ,  Kenji Sugiura ,  Naohiro Kumagai ,  Seiichi Kogure ,  Junpei Fujita ,  Hirokazu Ishii ,  Takehide Mizutani ,  Atsushi Nagata ,  Keigo Nakamura

IPC: G03G15/16 ,  G03G15/00

Abstract: An improved image forming apparatus includes an image bearer, a nip forming member, a transfer power source, and a controller. The controller switches a transfer mode between a first mode to transfer the toner image onto a first type sheet having a surface smoothness higher than a surface smoothness of a second type sheet and a second mode to transfer the toner image onto the second type sheet. The controller controls the transfer power source to output the transfer bias having an opposite-peak duty of greater than or equal to 50% that is a duty on the side of the opposite-peak value in the first mode. The controller controls the transfer power source to output the transfer bias having an opposite-peak duty of less than 50%, which is different from the opposite-peak duty of the first mode, in the second mode.

公开(公告)号：US20180157209A1

公开(公告)日：2018-06-07

申请号：US15831566

申请日：2017-12-05

Applicant: Junpei Fujita ,  Katsuhito Haruno ,  Atsushi Nakamoto ,  Masakazu Imai ,  Osamu Ichihashi ,  Takehide Mizutani ,  Naoto Kochi

Inventor： Junpei Fujita ,  Katsuhito Haruno ,  Atsushi Nakamoto ,  Masakazu Imai ,  Osamu Ichihashi ,  Takehide Mizutani ,  Naoto Kochi

IPC: G03G15/16

CPC classification number: G03G21/0094 ,  G03G15/161 ,  G03G15/1675 ,  G03G15/5008 ,  G03G21/0011 ,  G03G2215/00059

Abstract: A transfer device includes an image bearer, a rotatable body, a solid lubricant assembly, and a guide. An image bearer bears an image. The rotatable body forms a transfer nip with the image bearer to rotate in contact with a recording medium. An image on the image bearer is transferred onto the recording medium at the transfer nip. The solid lubricant assembly includes a solid lubricant and extends in a longitudinal direction of the rotatable body. The solid lubricant assembly applies a solid lubricant to at least one of the rotatable body and the image bearer. The guide guides the recording medium and positions the solid lubricant assembly.

公开(公告)号：US20180143570A1

公开(公告)日：2018-05-24

申请号：US15801858

申请日：2017-11-02

Applicant: Takehide MIZUTANI ,  Naoto Kochi ,  Katsuhito Haruno ,  Atsushi Nakamoto ,  Masakazu Imai ,  Osamu Ichihashi

Inventor： Takehide MIZUTANI ,  Naoto Kochi ,  Katsuhito Haruno ,  Atsushi Nakamoto ,  Masakazu Imai ,  Osamu Ichihashi

IPC: G03G15/00

CPC classification number: G03G15/161 ,  G03G15/50 ,  G03G15/556 ,  G03G2215/1661

Abstract: An image forming apparatus includes a developing device, an image bearer, a transfer rotator, a blade contacting a surface of the transfer rotator, and a controller to control the developing device, the image bearer, and the transfer rotator. A first toner pattern image is formed on the image bearer, transferred onto the transfer rotator, and passed past the blade at least twice together with rotation of the transfer rotator in at start-up of the image forming apparatus. A second toner pattern image is formed on the image bearer after the start-up and during passage of a non-image area in which toner images are not formed. A range of the first toner pattern image is wider than a range of the second toner pattern image in a width direction perpendicular to a direction of travel of the image bearer.

公开(公告)号：US09811046B2

公开(公告)日：2017-11-07

申请号：US15189699

申请日：2016-06-22

Applicant: Yuuji Wada ,  Naohiro Kumagai ,  Seiichi Kogure ,  Junpei Fujita ,  Kazuki Yogosawa ,  Kenji Sugirua ,  Takehide Mizutani ,  Tatsuya Ohsugi ,  Hiroyoshi Haga ,  Hirokazu Ishii

Inventor： Yuuji Wada ,  Naohiro Kumagai ,  Seiichi Kogure ,  Junpei Fujita ,  Kazuki Yogosawa ,  Kenji Sugirua ,  Takehide Mizutani ,  Tatsuya Ohsugi ,  Hiroyoshi Haga ,  Hirokazu Ishii

IPC: G03G15/16 ,  G03G21/00

CPC classification number: G03G21/0005 ,  G03G15/1665 ,  G03G15/1675

Abstract: An image forming apparatus includes a rotatable image bearer, a toner image forming device, a transfer device, a transfer bias power source, and a cleaner. The toner image forming device is to form a toner image on the image bearer. The transfer device contacts a surface of the image bearer to form a transfer nip between the transfer device and the image bearer. The transfer bias power source is to output a transfer bias to transfer the toner image from the image bearer onto a recording medium in the transfer nip. The cleaner is disposed downstream from the transfer nip in a direction of rotation of the image bearer, to electrostatically attract and remove toner from the surface of the image bearer to a surface of the cleaner. The transfer bias includes an alternating current component.

公开(公告)号：US20170299994A1

公开(公告)日：2017-10-19

申请号：US15483221

申请日：2017-04-10

Applicant: Atsushi NAGATA ,  Shinya Tanaka ,  Hirokazu Ishii ,  Kenji Sugiura ,  Takehide Mizutani ,  Keigo Nakamura ,  Yuuji Wada ,  Naoto Kochi

Inventor： Atsushi NAGATA ,  Shinya Tanaka ,  Hirokazu Ishii ,  Kenji Sugiura ,  Takehide Mizutani ,  Keigo Nakamura ,  Yuuji Wada ,  Naoto Kochi

IPC: G03G15/00 ,  H04N1/032 ,  G03G15/04 ,  G06K15/12 ,  G03G15/043

CPC classification number: G03G15/5037 ,  G03G15/04 ,  G03G15/043 ,  G06K15/12 ,  H04N1/032

Abstract: An image forming apparatus includes an image bearer, an image forming device to form a toner image on the image bearer with toner, a power source to output a bias to transfer the toner image onto a recording medium, and control circuitry. The circuitry controls the power source to decrease a peak-to-peak voltage of the bias in response to increase in at least one of temperature and humidity, when a time-averaged voltage of the bias is on a transfer side of transferring the toner to the recording medium, from a median value of maximum and minimum voltages of the bias. The circuitry controls the power source to increase the peak-to-peak voltage of the bias in response to increase in at least one of temperature and humidity, when the time-averaged voltage of the bias is on a return side of returning the toner to the image bearer, from the median value.

公开(公告)号：US09766575B2

公开(公告)日：2017-09-19

申请号：US15143806

申请日：2016-05-02

Applicant: Tatsuya Ohsugi ,  Kenji Sugiura ,  Hirokazu Ishii ,  Hiroyoshi Haga ,  Yuuji Wada ,  Takehide Mizutani ,  Naoto Kochi ,  Naohiro Kumagai ,  Seiichi Kogure ,  Junpei Fujita ,  Kazuki Yogosawa

Inventor： Tatsuya Ohsugi ,  Kenji Sugiura ,  Hirokazu Ishii ,  Hiroyoshi Haga ,  Yuuji Wada ,  Takehide Mizutani ,  Naoto Kochi ,  Naohiro Kumagai ,  Seiichi Kogure ,  Junpei Fujita ,  Kazuki Yogosawa

IPC: G03G15/16

CPC classification number: G03G15/1675 ,  G03G15/1605 ,  G03G2215/0129

Abstract: An image forming apparatus, including an image bearer configured to bear a toner image; a transfer device disposed opposing to the image bearer; and a transfer bias power source. The transfer bias power source is configured to output a transfer bias to transfer the toner image onto a recording medium. The transfer bias is a superimposed bias that cyclically alternates between a transfer-directional bias to transfer the toner image from the image bearer onto the recording medium and an opposite-directional bias in an opposite direction of the transfer direction. A ratio of a time period of application of the opposite-directional bias to a total time period of one cycle of the output transfer bias is greater than 50%. The transfer bias power source changes a value of a direct current voltage in the superimposed bias according to a linear velocity of the image bearer.

公开(公告)号：US09740156B2

公开(公告)日：2017-08-22

申请号：US15071773

申请日：2016-03-16

Applicant: Yuuji Wada ,  Hiroyoshi Haga ,  Naohiro Kumagai ,  Seiichi Kogure ,  Junpei Fujita ,  Kazuki Yogosawa ,  Kenji Sugiura ,  Takehide Mizutani ,  Tatsuya Ohsugi ,  Hirokazu Ishii

Inventor： Yuuji Wada ,  Hiroyoshi Haga ,  Naohiro Kumagai ,  Seiichi Kogure ,  Junpei Fujita ,  Kazuki Yogosawa ,  Kenji Sugiura ,  Takehide Mizutani ,  Tatsuya Ohsugi ,  Hirokazu Ishii

IPC: G03G15/16 ,  G03G15/00

CPC classification number: G03G15/6591 ,  G03G15/1605 ,  G03G15/1675 ,  G03G2215/00776

Abstract: An image forming apparatus includes a toner image forming unit, a nip formation member, a transfer power source, an information acquisition device, and a controller. The information acquisition device acquires specific information that specifies whether a recording sheet as a transfer target of a toner image is an uneven surface sheet having an uneven surface. The controller outputs a bias including a superimposed voltage, in which an alternating current (AC) voltage is superimposed on a direct current (DC) voltage, as a transfer bias from the transfer power source when the specific information acquired by the information acquisition device is not information corresponding to the uneven surface sheet and to output a bias including only the DC voltage as the transfer bias from the transfer power source when the specific information is the information corresponding to the uneven surface sheet.

公开(公告)号：US20160334739A1

公开(公告)日：2016-11-17

申请号：US15143806

申请日：2016-05-02

Applicant: Tatsuya OHSUGI ,  Kenji SUGIURA ,  Hirokazu ISHII ,  Hiroyoshi HAGA ,  Yuuji WADA ,  Takehide MIZUTANI ,  Naoto KOCHI ,  Naohiro KUMAGAI ,  Seiichi KOGURE ,  Junpei FUJITA ,  Kazuki YOGOSAWA

Inventor： Tatsuya OHSUGI ,  Kenji SUGIURA ,  Hirokazu ISHII ,  Hiroyoshi HAGA ,  Yuuji WADA ,  Takehide MIZUTANI ,  Naoto KOCHI ,  Naohiro KUMAGAI ,  Seiichi KOGURE ,  Junpei FUJITA ,  Kazuki YOGOSAWA

IPC: G03G15/16

CPC classification number: G03G15/1675 ,  G03G15/1605 ,  G03G2215/0129

Abstract: An image forming apparatus, including an image bearer configured to bear a toner image; a transfer device disposed opposing to the image bearer; and a transfer bias power source. The transfer bias power source is configured to output a transfer bias to transfer the toner image onto a recording medium. The transfer bias is a superimposed bias that cyclically alternates between a transfer-directional bias to transfer the toner image from the image bearer onto the recording medium and an opposite-directional bias in an opposite direction of the transfer direction. A ratio of a time period of application of the opposite-directional bias to a total time period of one cycle of the output transfer bias is greater than 50%. The transfer bias power source changes a value of a direct current voltage in the superimposed bias according to a linear velocity of the image bearer.

Abstract translation: 一种图像形成装置，包括构造成承载调色剂图像的图像载体; 与所述图像载体相对设置的传送装置; 和转印偏压电源。 转印偏压电源被配置为输出转印偏压以将调色剂图像转印到记录介质上。 转印偏压是在将调色剂图像从图像载体转印到记录介质上的转印方向偏置和在转印方向的相反方向上的相反方向的偏压之间循环地交替的叠加偏压。 反方向偏压的施加时间与输出转印偏压的一个周期的总时间周期的比率大于50％。 转印偏压电源根据图像承载的线速度改变叠加偏压中的直流电压的值。

公开(公告)号：US20160334738A1

公开(公告)日：2016-11-17

申请号：US15142424

申请日：2016-04-29

Applicant: Naoto KOCHI ,  Kenji SUGIURA ,  Hirokazu ISHll ,  Hiroyoshi HAGA ,  Yuuji WADA ,  Takehide MIZUTANI ,  Naohiro KUMAGAI ,  Junpei FUJITA ,  Tatsuya OHSUGI ,  Kazuki YOGOSAWA

Inventor： Naoto KOCHI ,  Kenji SUGIURA ,  Hirokazu ISHll ,  Hiroyoshi HAGA ,  Yuuji WADA ,  Takehide MIZUTANI ,  Naohiro KUMAGAI ,  Junpei FUJITA ,  Tatsuya OHSUGI ,  Kazuki YOGOSAWA

IPC: G03G15/16

CPC classification number: G03G15/163 ,  G03G15/1605 ,  G03G15/1675 ,  G03G2215/0129

Abstract: An image forming apparatus includes an image bearer, a transfer device contacting the image bearer to form a transfer portion, a transfer bias power source, and a controller. A ratio of a time period of application of the opposite-directional bias to a total time period of one cycle of the AC component of the superimposed bias is greater than 50%. A ratio of a value of the DC component of the superimposed bias output within a region ranging from a leading end of the recording medium to a predetermined length to a value of the DC component of the superimposed bias output outside the region is greater than a ratio of a value of the AC component of the superimposed bias output within the region to a value of the AC component of the superimposed bias output outside the region.

Abstract translation: 图像形成装置包括图像载体，与图像载体接触以形成转印部分的转印装置，转印偏压电源和控制器。 反向偏置的施加时间周期与叠加偏压的交流分量的一个周期的总时间周期的比率大于50％。 在从记录介质的前端到预定长度的范围内的叠加偏压输出的直流分量的值与区域外的叠加偏压输出的直流分量的值之比大于比率 将该区域内的叠加偏压输出的AC分量的值设定为该区域外的叠加偏压输出的交流分量的值。

公开(公告)号：US20160274503A1

公开(公告)日：2016-09-22

申请号：US15065600

申请日：2016-03-09

Applicant: Kenji SUGIURA ,  Hiroyoshi HAGA ,  Hirokazu ISHll ,  Naohiro KUMAGAI ,  Seiichi KOGURE ,  Junpei FUJITA ,  Takehide MIZUTANI ,  Yuuji WADA ,  Naoto KOCHI ,  Tatsuya OHSUGI ,  Kazuki YOGOSAWA

Inventor： Kenji SUGIURA ,  Hiroyoshi HAGA ,  Hirokazu ISHll ,  Naohiro KUMAGAI ,  Seiichi KOGURE ,  Junpei FUJITA ,  Takehide MIZUTANI ,  Yuuji WADA ,  Naoto KOCHI ,  Tatsuya OHSUGI ,  Kazuki YOGOSAWA

IPC: G03G15/16

CPC classification number: G03G15/162 ,  G03G15/1605 ,  G03G15/1675

Abstract: An image forming apparatus includes an image bearer; a toner image forming device; an intermediate transferor; a primary transfer power source; a secondary transfer nip forming device; and a secondary transfer power source to output a secondary transfer bias. One of two peak values of the secondary transfer bias is a transfer peak value to provide a greater transfer-directional force to move toner from the intermediate transferor toward the recording medium in the secondary transfer nip. An absolute value of the transfer peak value is greater than an absolute value of the primary transfer bias.

Abstract translation: 图像形成装置包括图像载体; 调色剂图像形成装置; 中间转让人 一次传输电源; 二次转印压区成形装置; 和二次转印电源，以输出二次转印偏压。 二次转印偏压的两个峰值值之一是转印峰值，以提供更大的转印方向力，以将调色剂从中间转印器向二次转印辊隙中的记录介质移动。 转印峰值的绝对值大于一次转印偏压的绝对值。