公开(公告)号：EP0733957B1

公开(公告)日：2002-04-24

申请号：EP96107772.4

申请日：1993-01-20

申请人： Ricoh Company, Ltd

发明人： Takano, Satoshi ,  Matsuda, Itaru ,  Harasawa, Yuko

IPC分类号： G03G15/16

CPC分类号： G03G15/1675 ,  G03G15/1615 ,  G03G15/1685 ,  G03G2215/1623 ,  G03G2215/1661

公开(公告)号：EP0552730B1

公开(公告)日：1998-07-15

申请号：EP93100794.2

申请日：1993-01-20

申请人： Ricoh Company, Ltd

发明人： Takano, Satoshi ,  Matsuda, Itaru ,  Harasawa, Yuko

IPC分类号： G03G15/16

CPC分类号： G03G15/1675 ,  G03G15/1615 ,  G03G15/1685 ,  G03G2215/1623 ,  G03G2215/1661

公开(公告)号：EP0898211B1

公开(公告)日：2002-01-02

申请号：EP98119756.9

申请日：1994-09-28

申请人： Ricoh Company, Ltd

发明人： Harasawa, Yuko ,  Matsuda, Itaru ,  Takano, Satoshi ,  Kutsuwada,Akio ,  Ishii, Hirokazu

IPC分类号： G03G15/16

CPC分类号： G03G15/1675 ,  G03G2215/1623

公开(公告)号：EP0646850B1

公开(公告)日：1999-05-12

申请号：EP94115299.3

申请日：1994-09-28

申请人： Ricoh Company, Ltd.

发明人： Harasawa, Yuko ,  Matsuda, Itaru ,  Takano, Satoshi ,  Kutsuwada, Akio ,  Ishii, Hirokazu

IPC分类号： G03G15/16 ,  G03G15/18

CPC分类号： G03G15/1675 ,  G03G2215/1623

公开(公告)号：EP0552730A2

公开(公告)日：1993-07-28

申请号：EP93100794.2

申请日：1993-01-20

申请人： Ricoh Company, Ltd

发明人： Takano, Satoshi ,  Matsuda, Itaru ,  Harasawa, Yuko

IPC分类号： G03G15/16

CPC分类号： G03G15/1675 ,  G03G15/1615 ,  G03G15/1685 ,  G03G2215/1623 ,  G03G2215/1661

摘要： An image transferring device (1) incorporated in an image forming apparatus and capable of surely preventing a sheet from wrapping around a photoconductive element (2) and from being incompletely separated from a transfer belt (5). A transfer bias and discharge are effected to prevent changes in the resistances of the transfer belt (5) and sheet ascribable to changes in environment from translating into changes in a current to flow to the photoconductive element (2), and to efficiently dissipate a charge deposited on the belt (5). Various members constituting the device are positioned relative to one another such that the discharging effect is achievable most effectively while preventing the transfer bias from causing dielectric breakdown in any constituent part.

摘要翻译： 一种图像转印装置，其结合在图像形成装置中，并且能够可靠地防止片材缠绕在感光元件周围并且不会与转印带不完全分离。 实现转印偏压和放电，以防止归因于环境变化的转印带和片材的电阻变化，从而转变成电流流向光电导元件的变化，并且有效地耗散沉积在带上的电荷。 构成装置的各种构件相对于彼此定位，使得可以最有效地实现放电效果，同时防止转印偏压在任何构成部分中引起电介质击穿。

公开(公告)号：EP1324154A2

公开(公告)日：2003-07-02

申请号：EP02028799.1

申请日：2002-12-27

申请人： Ricoh Company, Ltd.

发明人： Matsuda, Itaru ,  Tanoue, Ryoh

IPC分类号： G03G15/16

CPC分类号： G03G15/1675 ,  G03G2215/1623

摘要： An image transferring and recording medium conveying device for an image forming apparatus of the present invention includes a belt (11) forming a nip (N) for image transfer between it and an image carrier (W) and conveying a recording medium (P) via the nip to thereby transfer a toner image formed on the image carrier to the recording medium. A bias applying device applies a bias for image transfer to the nip. Assume that an image transfer bias Tb is applied during a leading edge interval in which the leading edge portion of the recording medium between the leading edge and a preselected position in the direction of medium conveyance moves away from the nip, and that an image transfer bias Ta is applied to the nip during a remaining interval in which the remaining portion of the recording medium moves away from the nip. Then, a controller switches the image transfer bias Tb within a range lower than the image transfer bias Ta.

公开(公告)号：EP0898211A2

公开(公告)日：1999-02-24

申请号：EP98119756.9

申请日：1994-09-28

申请人： Ricoh Company, Ltd

发明人： Harasawa, Yuko ,  Matsuda, Itaru ,  Takano, Satoshi ,  Kutsuwada,Akio ,  Ishii, Hirokazu

IPC分类号： G03G15/16

CPC分类号： G03G15/1675 ,  G03G2215/1623

摘要： In an image transfer device for an image forming equipment, a bias for image transfer is applied from a power source to an endless transfer belt via a bias roller. A current from the transfer belt is released to ground via a ground electrode. Transfer control means variably controls a current I 1 output from the power source such that the difference between the current I 1 and a current I 2 flowing from the power source to the ground electrode via the transfer belt, i.e., I out = I 1 - I 2 remains at a preselected target current. Setting means sets the target current on the basis of a set condition or conditions.

摘要翻译： 在用于图像形成设备的图像转印装置中，通过偏压辊（19）将图像转印偏压从电源（28）施加到环形转印带（17）。 来自转印带（17）的电流经由接地电极释放到地面。 转移控制装置（29）可变地控制从电源（28）输出的电流I1，使得电流I1与从电源（28）经由转印带（17）流到接地电极的电流I2之间的差异， ，即Iout = I1-I2保持在预选的目标电流。 设定装置根据设定的条件或条件设定目标电流。

公开(公告)号：EP0646850A2

公开(公告)日：1995-04-05

申请号：EP94115299.3

申请日：1994-09-28

申请人： Ricoh Company, Ltd

发明人： Harasawa, Yuko ,  Matsuda, Itaru ,  Takano, Satoshi ,  Kutsuwada, Akio ,  Ishii, Hirokazu

IPC分类号： G03G15/16 ,  G03G15/18

CPC分类号： G03G15/1675 ,  G03G2215/1623

摘要： In an image transfer device for an image forming equipment, a bias for image transfer is applied from a power source to an endless transfer belt via a bias roller. A current from the transfer belt is released to ground via a ground electrode. Transfer control means variably controls a current I₁ output from the power source such that the difference between the current I₁ and a current I₂ flowing from the power source to the ground electrode via the transfer belt, i.e., I out = I₁ - 1₂ remains at a preselected target current. Setting means sets the target current on the basis of a set condition or conditions.

摘要翻译： 在用于图像形成设备的图像转印装置中，用于图像转印的偏压经由偏压辊从电源施加到环形转印带。 来自转印带的电流通过接地电极释放到地面。 传输控制装置可变地控制从电源输出的电流I 1，使得电流I 1和通过传输带从电源流到接地电极的电流I 2之间的差，即Iout = I 1 - 1 2保持预选 目标电流。 设定装置根据设定的条件设定目标电流。

公开(公告)号：EP0552730A3

公开(公告)日：1994-04-27

申请号：EP93100794.2

申请日：1993-01-20

申请人： Ricoh Company, Ltd

发明人： Takano, Satoshi ,  Matsuda, Itaru ,  Harasawa, Yuko

IPC分类号： G03G15/16

CPC分类号： G03G15/1675 ,  G03G15/1615 ,  G03G15/1685 ,  G03G2215/1623 ,  G03G2215/1661

摘要： An image transferring device (1) incorporated in an image forming apparatus and capable of surely preventing a sheet from wrapping around a photoconductive element (2) and from being incompletely separated from a transfer belt (5). A transfer bias and discharge are effected to prevent changes in the resistances of the transfer belt (5) and sheet ascribable to changes in environment from translating into changes in a current to flow to the photoconductive element (2), and to efficiently dissipate a charge deposited on the belt (5). Various members constituting the device are positioned relative to one another such that the discharging effect is achievable most effectively while preventing the transfer bias from causing dielectric breakdown in any constituent part.

摘要翻译： 一种图像转印装置（1），该图像转印装置（1）包含在图像形成设备中并且能够可靠地防止片材卷绕在光电导元件（2）上并且不完全与转印带（5）分离。 实现转印偏压和放电以防止转印带（5）和片材的电阻的变化归因于环境的变化，从而转变成流向光电导元件（2）的电流的变化，并且有效地耗散电荷 沉积在传送带（5）上。 构成该装置的各种构件相对于彼此定位，使得可以最有效地实现放电效果，同时防止转印偏压在任何组成部分中引起介电击穿。

公开(公告)号：EP1324154A3

公开(公告)日：2004-06-02

申请号：EP02028799.1

申请日：2002-12-27

申请人： Ricoh Company, Ltd.

发明人： Matsuda, Itaru ,  Tanoue, Ryoh

IPC分类号： G03G15/16

CPC分类号： G03G15/1675 ,  G03G2215/1623

摘要： An image transferring and recording medium conveying device for an image forming apparatus of the present invention includes a belt (11) forming a nip (N) for image transfer between it and an image carrier (W) and conveying a recording medium (P) via the nip to thereby transfer a toner image formed on the image carrier to the recording medium. A bias applying device applies a bias for image transfer to the nip. Assume that an image transfer bias Tb is applied during a leading edge interval in which the leading edge portion of the recording medium between the leading edge and a preselected position in the direction of medium conveyance moves away from the nip, and that an image transfer bias Ta is applied to the nip during a remaining interval in which the remaining portion of the recording medium moves away from the nip. Then, a controller switches the image transfer bias Tb within a range lower than the image transfer bias Ta.

摘要翻译： 本发明的图像形成装置的图像传送和记录介质传送装置包括：带（11），形成用于在图像传送和图像载体（W）之间进行图像转印的辊隙（N），并通过记录介质 从而将形成在图像载体上的调色剂图像转印到记录介质上。 偏置施加装置将图像转印的偏压施加到辊隙。 假设在前缘区间中施加图像转印偏压Tb，其中记录介质的前边缘部分与介质传送方向上的预选位置之间的记录介质的前缘部分离开辊隙移动，并且图像转印偏压 在记录介质的剩余部分离开辊隙的剩余间隔期间，将Ta施加到辊隙。 然后，控制器将图像转印偏压Tb切换到低于图像转印偏压Ta的范围内。