公开(公告)号：US20170329263A1

公开(公告)日：2017-11-16

申请号：US15596365

申请日：2017-05-16

Applicant: Kenji Sugiura ,  Naohiro Kumagai ,  Seiichi Kogure ,  Junpei Fujita ,  Kazuki Yogosawa ,  Yuuji Wada ,  Jyunya Sakuraba

Inventor： Kenji Sugiura ,  Naohiro Kumagai ,  Seiichi Kogure ,  Junpei Fujita ,  Kazuki Yogosawa ,  Yuuji Wada ,  Jyunya Sakuraba

IPC: G03G15/16

CPC classification number: G03G15/1665 ,  G03G15/0189 ,  G03G15/1605 ,  G03G15/1675 ,  G03G15/5058

Abstract: An image forming apparatus includes an image bearer including a first image portion to bear a first toner image, a second image portion to bear a second toner image, and a non-image portion to bear an adjustment pattern. A transferor forms a transfer nip with the image bearer. A controller controls the power source to output an image bias as a transfer bias to transfer the first toner image and the second toner image onto a first recording medium and a second recording medium, respectively, in the transfer nip when the first image portion and the second image portion pass through the transfer nip and output a non-image bias as the transfer bias when the non-image portion passes through the transfer nip. The controller performs a constant current control on the image bias and performs a constant voltage control when the image bias switches to the non-image bias.

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：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：US20170235257A1

公开(公告)日：2017-08-17

申请号：US15432392

申请日：2017-02-14

Applicant: Naoto KOCHI ,  Hirokazu ISHII ,  Seiichi KOGURE ,  Naohiro KUMAGAI ,  Kenji SUGIURA ,  Shinya TANAKA ,  Hiroki NAKAMATSU ,  Yuuji WADA ,  Junpei FUJITA ,  Takahiro SUZUKI ,  Kazuki YOGOSAWA ,  Atsushi NAGATA

Inventor： Naoto KOCHI ,  Hirokazu ISHII ,  Seiichi KOGURE ,  Naohiro KUMAGAI ,  Kenji SUGIURA ,  Shinya TANAKA ,  Hiroki NAKAMATSU ,  Yuuji WADA ,  Junpei FUJITA ,  Takahiro SUZUKI ,  Kazuki YOGOSAWA ,  Atsushi NAGATA

IPC: G03G15/16

CPC classification number: G03G15/1675 ,  G03G5/005 ,  G03G5/147

Abstract: An image forming apparatus includes an image bearer to bear a toner image, a nip forming member contacting the image bearer to form a transfer nip, and a transfer power source. The transfer bias has a transfer peak value to electrostatically move toner from the image bearer to the recording sheet and an opposite-peak value to electrostatically move less toner from the image bearer to the recording sheet than the transfer peak value. An opposite-peak duty of the transfer bias is less than 50%. The opposite-peak duty is tr/T×100% where T is one cycle of the transfer bias and tr is a time period during which the transfer bias is on a side of the opposite-peak value relative to an offset voltage of the transfer bias in the one cycle T.

公开(公告)号：US20170003630A1

公开(公告)日：2017-01-05

申请号：US15265562

申请日：2016-09-14

Applicant: Tatsuya OHSUGI ,  Kenji SUGIURA ,  Jyunya SAKURABA ,  Hirokazu ISHII ,  Toshitaka YAMAGUCHI ,  Hiroyoshi HAGA ,  Naohiro KUMAGAI ,  Seiichi KOGURE ,  Junpei FUJITA ,  Yuuji WADA ,  Kazuki YOGOSAWA ,  Shinya TANAKA ,  Masayoshi NAKAYAMA

Inventor： Tatsuya OHSUGI ,  Kenji SUGIURA ,  Jyunya SAKURABA ,  Hirokazu ISHII ,  Toshitaka YAMAGUCHI ,  Hiroyoshi HAGA ,  Naohiro KUMAGAI ,  Seiichi KOGURE ,  Junpei FUJITA ,  Yuuji WADA ,  Kazuki YOGOSAWA ,  Shinya TANAKA ,  Masayoshi NAKAYAMA

IPC: G03G15/16

CPC classification number: G03G15/1675 ,  G03G15/1605 ,  G03G15/162 ,  G03G15/1665 ,  G03G15/1685

Abstract: An image forming apparatus includes an image bearer, a transfer member, and a power source. The image bearer includes a plurality of layers. The transfer member forms a transfer nip between the image bearer and the transfer member. The power source outputs a transfer bias to transfer a toner image from the image bearer onto a recording sheet in the transfer nip. The transfer bias alternates between a transfer-side bias that causes the toner image to move from the image bearer to the recording sheet, and an opposite-side bias different from the transfer-side bias. A duty ratio of a time period, during which the opposite-side bias is output, relative to one cycle of a waveform, is greater than 50%.

Abstract translation: 图像形成装置包括图像载体，转印构件和电源。 图像载体包括多个层。 转印部件在图像承载体和转印部件之间形成转印辊隙。 电源输出转印偏压以将调色剂图像从图像载体转印到转印辊隙中的记录纸上。 转印偏压在导致调色剂图像从图像载体移动到记录片材的转印侧偏置之间交替，并且与转印侧偏压不同的相反侧偏置交替。 相对于波形的一个周期，输出相对侧偏压的时间段的占空比大于50％。

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：US09459564B2

公开(公告)日：2016-10-04

申请号：US14881611

申请日：2015-10-13

Applicant: Tatsuya Ohsugi ,  Kenji Sugiura ,  Jyunya Sakuraba ,  Hirokazu Ishii ,  Toshitaka Yamaguchi ,  Hiroyoshi Haga ,  Naohiro Kumagai ,  Seiichi Kogure ,  Junpei Fujita ,  Yuuji Wada ,  Kazuki Yogosawa ,  Shinya Tanaka ,  Masayoshi Nakayama

Inventor： Tatsuya Ohsugi ,  Kenji Sugiura ,  Jyunya Sakuraba ,  Hirokazu Ishii ,  Toshitaka Yamaguchi ,  Hiroyoshi Haga ,  Naohiro Kumagai ,  Seiichi Kogure ,  Junpei Fujita ,  Yuuji Wada ,  Kazuki Yogosawa ,  Shinya Tanaka ,  Masayoshi Nakayama

IPC: G03G15/20 ,  G03G15/16

CPC classification number: G03G15/1675 ,  G03G15/1605 ,  G03G15/162 ,  G03G15/1665 ,  G03G15/1685

Abstract: An image forming apparatus includes an image bearer, a transfer member, and a power source. The image bearer includes a plurality of layers. The transfer member forms a transfer nip between the image bearer and the transfer member. The power source outputs a transfer bias to transfer a toner image from the image bearer onto a recording sheet in the transfer nip. The transfer bias alternates between a transfer-side bias that causes the toner image to move from the image bearer to the recording sheet, and an opposite-side bias different from the transfer-side bias. A duty ratio of a time period, during which the opposite-side bias is output, relative to one cycle of a waveform, is greater than 50%.

Abstract translation: 图像形成装置包括图像载体，转印构件和电源。 图像载体包括多个层。 转印部件在图像承载体和转印部件之间形成转印辊隙。 电源输出转印偏压以将调色剂图像从图像载体转印到转印辊隙中的记录纸上。 转印偏压在导致调色剂图像从图像载体移动到记录片材的转印侧偏置之间交替，并且与转印侧偏压不同的相反侧偏置交替。 相对于波形的一个周期，输出相对侧偏压的时间段的占空比大于50％。

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。