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1. 发明申请

US20130236201A1 IMAGE FORMING APPARATUS 有权
标题翻译：图像形成装置
公开(公告)号：US20130236201A1
公开(公告)日：2013-09-12
申请号：US13785621
申请日：2013-03-05
申请人： Takehide Mizutani , Shinya Tanaka , Yasunobu Shimizu , Hirokazu Ishii , Keigo Nakamura
发明人： Takehide Mizutani , Shinya Tanaka , Yasunobu Shimizu , Hirokazu Ishii , Keigo Nakamura
IPC分类号： G03G15/16 , G03G15/08
CPC分类号： G03G15/1675 , G03G15/1605 , G03G15/556 , G03G15/6591
摘要： An image forming apparatus includes a toner forced consumption control unit that performs toner forced consumption control in which toner in a developing unit is forcibly consumed when a certain condition to perform the toner forced consumption control is met. The certain condition to perform the toner forced consumption control includes a specific performance condition that a transfer bias switching condition to switch a transfer bias to a superimposed transfer bias in which an alternating current component is superimposed on a direct current component, from a direct current transfer bias is met. When the specific performance condition is met, the toner forced consumption control unit performs preliminary toner forced consumption control in which the toner forced consumption control is performed before an image forming operation using the superimposed transfer bias is started.
摘要翻译：图像形成装置包括调色剂强制消耗控制单元，其执行调色剂强制消耗控制，其中当执行调色剂强制消耗控制的特定条件时，显影单元中的调色剂被强制消耗。执行调色剂强制消耗控制的特定条件包括：特定的性能条件，即转印偏压切换条件，其将转印偏压切换到其中交流分量叠加在直流分量上的叠加转印偏压，从直流转印偏见得到满足。当满足特定性能条件时，调色剂强制消耗控制单元在开始使用叠加的转印偏压的图像形成操作之前执行调色剂强制消耗控制的初步调色剂强制消耗控制。

2. 发明授权

US09046830B2 Image forming apparatus 有权
标题翻译：图像形成装置
公开(公告)号：US09046830B2
公开(公告)日：2015-06-02
申请号：US14173122
申请日：2014-02-05
申请人： Shinya Tanaka , Hirokazu Ishii , Yasunobu Shimizu , Takehide Mizutani , Keigo Nakamura
发明人： Shinya Tanaka , Hirokazu Ishii , Yasunobu Shimizu , Takehide Mizutani , Keigo Nakamura
IPC分类号： G03G15/16
CPC分类号： G03G15/1675 , G03G15/1605
摘要： An image forming apparatus includes a rotatable image bearing member, a nip forming member, and a power source. The rotatable image bearing member bears a toner image on a surface thereof and rotates. The nip forming member contacts the surface of the image bearing member to form a transfer nip therebetween. The power source applies a transfer bias to the transfer nip to transfer the toner image from the image bearing member onto a recording medium interposed in the transfer nip. The transfer bias includes a superimposed transfer bias in which an alternating current (AC) component is superimposed on a direct current (DC) component and a polarity of the superimposed transfer bias changes with time. A phase difference between an AC voltage and an AC current output from the power source is equal to or less than 0.47 cycles.
摘要翻译：图像形成装置包括可旋转图像承载部件，辊隙形成部件和动力源。可旋转图像承载部件在其表面上承载调色剂图像并旋转。辊隙形成构件接触图像承载构件的表面以在它们之间形成转印辊隙。电源将转印偏压施加到转印压区，以将调色剂图像从图像承载部件转印到介于转印辊隙中的记录介质上。转印偏压包括其中交流（AC）分量叠加在直流（DC）分量上并且叠加转印偏压的极性随时间变化的叠加转印偏压。交流电压与从电源输出的交流电流之间的相位差等于或小于0.47个周期。

3. 发明授权

US08965227B2 Image forming apparatus including forced toner consumption control 有权
标题翻译：图像形成装置包括强制调色剂消耗控制
公开(公告)号：US08965227B2
公开(公告)日：2015-02-24
申请号：US13785621
申请日：2013-03-05
申请人： Takehide Mizutani , Shinya Tanaka , Yasunobu Shimizu , Hirokazu Ishii , Keigo Nakamura
发明人： Takehide Mizutani , Shinya Tanaka , Yasunobu Shimizu , Hirokazu Ishii , Keigo Nakamura
IPC分类号： G03G15/16 , G03G15/00
CPC分类号： G03G15/1675 , G03G15/1605 , G03G15/556 , G03G15/6591
摘要： An image forming apparatus includes a toner forced consumption control unit that performs toner forced consumption control in which toner in a developing unit is forcibly consumed when a certain condition to perform the toner forced consumption control is met. The certain condition to perform the toner forced consumption control includes a specific performance condition that a transfer bias switching condition to switch a transfer bias to a superimposed transfer bias in which an alternating current component is superimposed on a direct current component, from a direct current transfer bias is met. When the specific performance condition is met, the toner forced consumption control unit performs preliminary toner forced consumption control in which the toner forced consumption control is performed before an image forming operation using the superimposed transfer bias is started.
摘要翻译：图像形成装置包括调色剂强制消耗控制单元，其执行调色剂强制消耗控制，其中当执行调色剂强制消耗控制的特定条件时，显影单元中的调色剂被强制消耗。执行调色剂强制消耗控制的特定条件包括：特定的性能条件，即转印偏压切换条件，其将转印偏压切换到其中交流分量叠加在直流分量上的叠加转印偏压，从直流转印偏见得到满足。当满足特定性能条件时，调色剂强制消耗控制单元在开始使用叠加的转印偏压的图像形成操作之前执行调色剂强制消耗控制的初步调色剂强制消耗控制。

4. 发明授权

US10281848B2 Image forming apparatus and image forming method 有权
公开(公告)号：US10281848B2
公开(公告)日：2019-05-07
申请号：US15427735
申请日：2017-02-08
申请人： 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
发明人： 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分类号： G03G15/16 , G03G15/00
摘要： 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.

5. 发明申请

US20170299994A1 IMAGE FORMING APPARATUS 审中-公开
公开(公告)号：US20170299994A1
公开(公告)日：2017-10-19
申请号：US15483221
申请日：2017-04-10
申请人： Atsushi NAGATA , Shinya Tanaka , Hirokazu Ishii , Kenji Sugiura , Takehide Mizutani , Keigo Nakamura , Yuuji Wada , Naoto Kochi
发明人： Atsushi NAGATA , Shinya Tanaka , Hirokazu Ishii , Kenji Sugiura , Takehide Mizutani , Keigo Nakamura , Yuuji Wada , Naoto Kochi
IPC分类号： G03G15/00 , H04N1/032 , G03G15/04 , G06K15/12 , G03G15/043
CPC分类号： G03G15/5037 , G03G15/04 , G03G15/043 , G06K15/12 , H04N1/032
摘要： 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.

6. 发明授权

US10295948B2 Image forming apparatus 有权
公开(公告)号：US10295948B2
公开(公告)日：2019-05-21
申请号：US15483548
申请日：2017-04-10
申请人： Keigo Nakamura , Hirokazu Ishii , Kenji Sugiura , Takehide Mizutani , Atsushi Nagata , Naoto Kochi , Yuuji Wada , Shinya Tanaka
发明人： Keigo Nakamura , Hirokazu Ishii , Kenji Sugiura , Takehide Mizutani , Atsushi Nagata , Naoto Kochi , Yuuji Wada , Shinya Tanaka
IPC分类号： G03G15/00 , G03G21/20 , G03G15/16
摘要： An image forming apparatus including an image bearer, a transfer-bias power source, an environment sensor, and a controller. The controller controls the transfer-bias power source to change the DC component and the AC component, according to the at least one of temperature and humidity detected by the environment sensor and a duty of the transfer bias. The duty is A/(A+B)×100[%] where A denotes an area on a return-directional side to move toner from the recording sheet back to the image bearer, relative to a center value (Voff) of a maximum value and a minimum value of the transfer bias in one cycle of a waveform of the transfer bias, and B denotes an area on a transfer-directional side to move the toner from the image bearer to the recording sheet, relative to the center value (Voff) in the one cycle.

7. 发明授权

US10073386B2 Image forming apparatus 有权
公开(公告)号：US10073386B2
公开(公告)日：2018-09-11
申请号：US15482837
申请日：2017-04-10
申请人： Naomi Sugimoto , Hirokazu Ishii , Kenji Sugiura , Atsushi Nagata , Takehide Mizutani , Keigo Nakamura , Yuuji Wada , Naoto Kochi , Shinya Tanaka
发明人： Naomi Sugimoto , Hirokazu Ishii , Kenji Sugiura , Atsushi Nagata , Takehide Mizutani , Keigo Nakamura , Yuuji Wada , Naoto Kochi , Shinya Tanaka
IPC分类号： G03G15/16
CPC分类号： G03G15/1665 , G03G15/1605 , G03G15/1675 , G03G15/5016 , G03G15/6591 , G03G2215/00751
摘要： An image forming apparatus including an image bearer; a nip forming member, a nip width changing device, a power source; and a controller. The controller switches between a first mode and a second mode according to a predetermined condition. In the first mode, a duty of the transfer bias is a first duty and a width of a transfer nip is a first width. In the second mode, the duty of the transfer bias is a second duty lower than the first duty and the width of the transfer nip is a second width greater than the first width. The duty is (T−Tt)/T×100% where T denotes one cycle of the transfer bias, and Tt denotes a time period, in which the transfer bias is on a transfer-directional side relative to a time-averaged value of the transfer bias, in the one cycle.

8. 发明授权

US10067454B2 Image forming apparatus 有权
公开(公告)号：US10067454B2
公开(公告)日：2018-09-04
申请号：US15483221
申请日：2017-04-10
申请人： Atsushi Nagata , Shinya Tanaka , Hirokazu Ishii , Kenji Sugiura , Takehide Mizutani , Keigo Nakamura , Yuuji Wada , Naoto Kochi
发明人： Atsushi Nagata , Shinya Tanaka , Hirokazu Ishii , Kenji Sugiura , Takehide Mizutani , Keigo Nakamura , Yuuji Wada , Naoto Kochi
IPC分类号： G03G15/00 , H04N1/032 , G03G15/04 , G06K15/12 , G03G15/043
摘要： 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.

9. 发明申请

US20170299987A1 IMAGE FORMING APPARATUS 审中-公开
公开(公告)号：US20170299987A1
公开(公告)日：2017-10-19
申请号：US15482837
申请日：2017-04-10
申请人： Naomi SUGIMOTO , Hirokazu Ishii , Kenji Sugiura , Atsushi Nagata , Takehide Mizutani , Keigo Nakamura , Yuuji Wada , Naoto Kochi , Shinya Tanaka
发明人： Naomi SUGIMOTO , Hirokazu Ishii , Kenji Sugiura , Atsushi Nagata , Takehide Mizutani , Keigo Nakamura , Yuuji Wada , Naoto Kochi , Shinya Tanaka
IPC分类号： G03G15/16
CPC分类号： G03G15/1665 , G03G15/1605 , G03G15/1675 , G03G15/5016 , G03G15/6591 , G03G2215/00751
摘要： An image forming apparatus including an image bearer; a nip forming member, a nip width changing device, a power source; and a controller. The controller switches between a first mode and a second mode according to a predetermined condition. In the first mode, a duty of the transfer bias is a first duty and a width of a transfer nip is a first width. In the second mode, the duty of the transfer bias is a second duty lower than the first duty and the width of the transfer nip is a second width greater than the first width. The duty is (T−Tt)/T×100% where T denotes one cycle of the transfer bias, and Tt denotes a time period, in which the transfer bias is on a transfer-directional side relative to a time-averaged value of the transfer bias, in the one cycle.

10. 发明授权

US09134656B2 Image forming apparatus 有权
标题翻译：图像形成装置
公开(公告)号：US09134656B2
公开(公告)日：2015-09-15
申请号：US14256178
申请日：2014-04-18
申请人： Takehide Mizutani , Hirokazu Ishii , Tsutomu Kato , Yasufumi Takahashi , Shinya Tanaka , Osamu Ichihashi , Yuji Kato
发明人： Takehide Mizutani , Hirokazu Ishii , Tsutomu Kato , Yasufumi Takahashi , Shinya Tanaka , Osamu Ichihashi , Yuji Kato
IPC分类号： G03G21/00 , G03G15/00 , G03G15/16
CPC分类号： G03G15/1605 , G03G15/1675
摘要： An image forming apparatus includes an image carrier, a transfer member, a power supply, and a control device that controls the power supply to output a DC-AC superimposed bias or a DC bias to transfer a toner image on the image carrier onto a recording medium. The control device controls the power supply to alternately output a first bias being a DC component the same in polarity as the DC bias and a second bias being a DC component opposite in polarity to the DC bias to clean the transfer member when image formation is not taking place. The first bias is output with two target output values including a first value and a second value lower than the first value. The second bias is output with one target output value. An output time of the second bias is longer than an output time of the first bias.
摘要翻译：图像形成装置包括图像载体，转印构件，电源和控制装置，其控制电源以输出DC-AC叠加偏置或DC偏压，以将图像载体上的调色剂图像转印到记录中。控制装置控制电源以交替地输出与DC偏压极性相同的DC分量的第一偏压，并且第二偏压是与DC偏压极性相反的DC分量，以在图像形成不是时直接清洁转印部件发生。输出第一偏置，其中两个目标输出值包括第一值和低于第一值的第二值。第二个偏置输出一个目标输出值。第二偏压的输出时间长于第一偏压的输出时间。

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