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1. 发明专利

JP2017090699A 画像形成装置审中-公开
公开(公告)号：JP2017090699A
公开(公告)日：2017-05-25
申请号：JP2015221088
申请日：2015-11-11
申请人：株式会社リコー , Ricoh Co Ltd
发明人： NAKAMURA KEIGO , OGINO YASUHIKO
IPC分类号： G03G15/16
摘要：【課題】記録材搬送速度が速いマシンでもニップ幅を広く取ることで交流電圧によるトナー往復運動回数を確保し、記録材の凹凸が大きくても良好な画像を得る。【解決手段】転写ニップ内に挟み込まれた記録材に対して像担持体上のトナー像を転写するため、記録材と像担持体の間に交流転写バイアスの電位差が形成され、その電位差によって形成される電界が、正規の極性に帯電しているトナーを像担持体側から記録材側へ転写させる電界と、記録材側から像担持体側に戻す電界との繰り返しからなる画像形成装置において、ニップ形成部材が、循環移動することで記録材を搬送する転写搬送ベルトと、転写搬送ベルトの裏面から像担持体に転写搬送ベルトを当接させる複数の転写ローラとから形成され、転写搬送ベルト回転方向に相前後して配置された複数の転写ローラ間で転写搬送ベルトと像担持体を接触させる。【選択図】図1

2. 发明专利

JP2014240881A 画像形成装置有权
标题翻译：图像形成装置
公开(公告)号：JP2014240881A
公开(公告)日：2014-12-25
申请号：JP2013122875
申请日：2013-06-11
申请人：株式会社リコー , Ricoh Co Ltd
发明人： OGINO YASUHIKO , IIMURA HARUO , AOKI SHINJI , NAKAMURA KEIGO
IPC分类号： G03G15/16 , G03G15/00 , G03G15/01
摘要：【課題】画像面積率の比較的低いトナー像を形成するときにおける濃淡パターンの発生を抑える。【解決手段】2次転写バイアスとして、直流電圧に交流電圧を重畳した重畳バイアスからなるものを用いて2次転写ニップ内に交番電界を形成する構成において、形成するトナー像の画像面積率が低くなるにつれて、2次転写転写ニップ内でのトナーの往復移動回数に影響を与える制御パラメータの変更によってその往復移動回数を増加させる移動回数調整処理を実施するように、制御部を構成した。より詳しくは、画像面積率が低くなるほど、制御パラメータとしての周波数fを高くするようにした。【選択図】図11
摘要翻译：要解决的问题：当形成具有相对低的图像面积比的调色剂图像时，抑制灰度图案的发生。解决方案：图像形成装置被配置为在二次转印压区中形成交变电场，使用二次转印偏压，一个包括通过将AC电压叠加在DC电压上而获得的叠加偏置，并且包括被配置为执行移动频率调整处理的控制单元，其通过改变控制参数来增加调色剂在二次转印压区中往复运动的频率这将随着要形成的调色剂图像的图像面积比变低而影响往复运动的频率。特别地，当图像面积比变低时，控制单元增加作为控制参数的频率f。

3. 发明专利

JP2014130190A Image forming apparatus 审中-公开
标题翻译：图像形成装置
公开(公告)号：JP2014130190A
公开(公告)日：2014-07-10
申请号：JP2012286934
申请日：2012-12-28
申请人： Ricoh Co Ltd , 株式会社リコー
发明人： YOSHII MASAKO , IIMURA HARUO , AOKI SHINJI , NAKAMURA KEIGO
IPC分类号： G03G15/16
摘要： PROBLEM TO BE SOLVED: To provide a transfer device which forms an excellent image even if resistance change occurs in a transfer member, and an image forming apparatus.SOLUTION: A transfer device includes: a photoreceptor for carrying a toner image; developing means for forming the toner image on the photoreceptor; a transfer sheet rotated at a predetermined speed or an intermediate transfer belt; and a transfer roller which is in contact with the inside of the transfer sheet or the intermediate transfer belt to apply transfer bias for transferring the toner image from the photoreceptor to the transfer sheet or the intermediate transfer belt. The transfer device includes: a driving source for driving the transfer roller independently; a transfer current sensor 69 which measures transfer current during predetermined image formation; and rotation control means 62 which controls rotation of the transfer roller according to information on the measured current.
摘要翻译：要解决的问题：提供即使在转印部件中发生电阻变化也形成优异的图像的转印装置和图像形成装置。传送装置包括：用于承载调色剂图像的感光体; 用于在感光体上形成调色剂图像的显影装置; 以预定速度旋转的转印纸或中间转印带; 以及转印辊，其与转印片或中间转印带的内部接触以施加转印偏压，以将调色剂图像从感光体转印到转印片或中间转印带。转印装置包括：独立驱动转印辊的驱动源; 在预定图像形成期间测量转印电流的转印电流传感器69; 以及根据关于测量电流的信息来控制转印辊的旋转的旋转控制装置62。

4. 发明专利

JP2014041335A Image forming apparatus 有权
标题翻译：图像形成装置
公开(公告)号：JP2014041335A
公开(公告)日：2014-03-06
申请号：JP2013106535
申请日：2013-05-20
申请人： Ricoh Co Ltd , 株式会社リコー
发明人： YOSHII MASAKO , IIMURA HARUO , AOKI SHINJI , OGINO YASUHIKO , NAKAMURA KEIGO
IPC分类号： G03G15/16 , B41J11/02 , B65H5/00 , G03G15/00
摘要： PROBLEM TO BE SOLVED: To provide an image forming apparatus that conveys various types of transfer target bodies having different states and shapes from each other stably with a simple configuration, and can form good images without dropouts and density unevenness.SOLUTION: An image forming apparatus includes conveying means that conveys a transfer target body P to a transfer position opposite to an intermediate transfer belt 31, and is configured to convey the transfer target body P from the upstream side in a transfer target body conveyance direction of the transfer position along to the transfer position, while holding a surface on the opposite side of a transfer target surface of the transfer target body with a conveyance belt 40. The image forming apparatus further includes a secondary transfer bias power source 39 that is configured to apply transfer bias including an AC component and a DC component to cause the conveyance belt 40 and the transfer target body P held by the conveyance belt 40 to be in non-contact with the intermediate transfer belt 31 at the transfer position.
摘要翻译：要解决的问题：提供一种图像形成装置，其以简单的结构稳定地传送具有不同状态和形状的各种类型的转印目标体，并且可以形成良好的图像而不会出现下落和浓度不均匀。解决方案：图像形成装置包括将转印目标体P输送到与中间转印带31相反的转印位置的输送装置，并且被构造成在转印位置的转印体传送方向上从转印目标主体输送方向的上游侧输送转印体传送位置，同时用输送带40在转印体的转印目标表面的相对侧上保持表面。图像形成装置还包括二次转印偏压电源39，其被配置为施加包括AC的转印偏压部件和直流部件，使输送带40和转印体P保持在输送机上电动皮带40在转印位置与中间转印带31不接触。

5. 发明专利

JP2013257535A Image forming apparatus 有权
标题翻译：图像形成装置
公开(公告)号：JP2013257535A
公开(公告)日：2013-12-26
申请号：JP2013065722
申请日：2013-03-27
申请人： Ricoh Co Ltd , 株式会社リコー
发明人： TANAKA SHINYA , ISHII KOICHI , SHIMIZU YASUNOBU , NAKAMURA KEIGO
IPC分类号： G03G15/16 , G03G15/00
CPC分类号： G03G15/1665 , G03G15/1675
摘要： PROBLEM TO BE SOLVED: To suppress an occurrence of a gradation pattern following the surface uneven shape of a recording sheet despite environment.SOLUTION: An image forming apparatus includes a temperature sensor and a humidity sensor that acquire temperature and humidity information that becomes a factor affecting transferability of a toner image from an intermediate transfer belt 31 to a recording sheet in a secondary transfer nip by a contact between the intermediate transfer belt 31 and a nip forming roller 36. A secondary transfer power supply 39 and a control unit are configured to perform processing of: outputting peak-to-peak value of an AC component of a secondary transfer bias by a constant voltage control; changing a target output value in the constant voltage control of the peak-to-peak value according to the detection results of the temperature and the humidity; and reducing the target output value in the constant voltage control of a DC component of the secondary transfer bias, as the output target value increases.
摘要翻译：要解决的问题：为了抑制记录纸的表面不均匀形状之后的灰度图案的发生，尽管环境。解决方案：图像形成装置包括温度传感器和湿度传感器，其获取成为影响因素的温度和湿度信息通过中间转印带31和辊隙形成辊36之间的接触，将调色剂图像从中间转印带31转印到二次转印辊隙中的记录片材。二次转印电源39和控制单元被配置为执行处理：通过恒定电压控制输出二次转印偏压的交流分量的峰 - 峰值; 根据温度和湿度的检测结果，在峰 - 峰值的恒定电压控制中改变目标输出值; 并且当输出目标值增加时，减小二次转印偏压的直流分量的恒定电压控制中的目标输出值。

6. 发明专利

JP2013250547A Image forming apparatus 审中-公开
标题翻译：图像形成装置
公开(公告)号：JP2013250547A
公开(公告)日：2013-12-12
申请号：JP2013024673
申请日：2013-02-12
申请人： Ricoh Co Ltd , 株式会社リコー
发明人： NAKAMURA KEIGO
IPC分类号： G03G15/00 , G03G15/08
CPC分类号： G03G15/167 , G03G15/5062 , G03G2215/0129
摘要： PROBLEM TO BE SOLVED: To provide an image forming apparatus capable of obtaining a satisfactory image free from uneven density even on a recording medium the degree of roughness of the surface of which varies.SOLUTION: An amount of attached toner image primarily transferred to an intermediate transfer belt 31 is detected by a potential sensor 38A, and an amount of attached residual toner on the belt after secondary transfer is detected by a potential sensor 38B. Surface characteristic detecting means 95 is arranged between a paper feed cassette 100 and a pair of registration rollers 101. A control section 120 calculates the degree of grain on the basis of detected data from an image read sensor 121. If the degree of grain is greater than a predetermined value, the control section 120 alters the transfer rate of a toner image to recording paper P on the basis of the data detected by the potential sensors 38A and 38B. The transfer rate is altered by controlling toner discharge or changing an amount of application by lubricant application means provided in a belt cleaning device 37.
摘要翻译：要解决的问题：为了提供一种即使在记录介质上也能获得令人满意的不均匀的图像的图像形成装置，其表面的粗糙度变化。解决方案：附着的调色剂图像的量主要传送到中间体转印带31由电位传感器38A检测，二次转印后的带上附着的残留调色剂量由电位传感器38B检测。表面特征检测装置95布置在供纸盒100和一对定位辊101之间。控制部分120基于来自图像读取传感器121的检测数据来计算颗粒度。如果颗粒度更大控制部分120基于由电位传感器38A和38B检测到的数据来改变调色剂图像到记录纸张P的传送速率。通过控制调色剂排出或通过设置在带清洁装置37中的润滑剂施加装置改变施加量来改变传送速率。

7. 发明专利

JP2013190469A Image forming apparatus 有权
标题翻译：图像形成装置
公开(公告)号：JP2013190469A
公开(公告)日：2013-09-26
申请号：JP2012054559
申请日：2012-03-12
申请人： Ricoh Co Ltd , 株式会社リコー
发明人： MIZUTANI TAKEHIDE , TANAKA SHINYA , SHIMIZU YASUNOBU , ISHII KOICHI , NAKAMURA KEIGO
IPC分类号： G03G21/00 , G03G15/08 , G03G15/16
CPC分类号： G03G15/1675 , G03G15/1605 , G03G15/556 , G03G15/6591
摘要： PROBLEM TO BE SOLVED: To improve transferability when superimposed transfer bias is used even if deterioration of toner is in progress in a developing device.SOLUTION: An image forming apparatus switches, when transferring a toner image to a recording material, transfer bias to DC transfer bias, or superimposed transfer bias in which an AC component superimposes on a DC component and polarity changes over time, according to predetermined transfer bias switching conditions. When transfer bias switching conditions for switching to superimposed transfer bias are satisfied, the image forming apparatus performs toner forcible consumption control before starting an image forming operation using superimposed transfer bias.
摘要翻译：要解决的问题：即使在显影装置中正在进行调色剂的劣化时，也可以使用叠加的转印偏压来提高转印性。解决方案：当将调色剂图像转印到记录材料时，图像形成装置将转印偏压转印到直流转印根据预定的转移偏压开关条件，AC分量叠加在DC分量上并且极性随时间而变化的偏置或叠加转印偏压。当满足用于切换到叠加的转印偏压的转印偏压切换条件时，图像形成装置在使用叠加的转印偏压开始图像形成操作之前执行调色剂强制消耗控制。

8. 发明专利

JP2013134293A Image forming apparatus 有权
标题翻译：图像形成装置
公开(公告)号：JP2013134293A
公开(公告)日：2013-07-08
申请号：JP2011283112
申请日：2011-12-26
申请人： Ricoh Co Ltd , 株式会社リコー
发明人： NAKAMURA KEIGO , SHIMIZU YASUNOBU , OGIYAMA HIROMI , ISHII KOICHI , TANAKA SHINYA
IPC分类号： G03G15/16 , G03G21/14
CPC分类号： G03G15/1665 , G03G15/1605 , G03G15/1675
摘要： PROBLEM TO BE SOLVED: To reduce deterioration of a member caused by an AC component even in the use of a transfer bias that includes a DC component and an AC component.SOLUTION: The image forming apparatus has a secondary transfer power source 39 that applies a secondary transfer bias to a secondary transfer nip, the secondary transfer bias including a DC component and an AC component, and the secondary transfer nip being formed between an intermediate transfer belt 31 whose surface is moved and a secondary transfer roller 36 disposed opposite the surface of the intermediate transfer belt. The image forming apparatus is configured such that a toner image held on the surface of the intermediate transfer belt surface is transferred to recording paper P, passed through the secondary transfer nip, by the action of a secondary transfer nip. The image forming apparatus has a control section 60 that exerts control such that, during the movement of the surface of the intermediate transfer belt and during a paper non-passage period in which recording paper is not passed through the secondary transfer nip, an AC component alteration period is present, in which the AC component is not applied or the peak-to peak voltage of the AC component is made lower than that during the image formation.
摘要翻译：要解决的问题：即使在使用包括直流分量和交流分量的转印偏压的情况下，也可以降低由交流分量引起的部件的劣化。解决方案：图像形成装置具有二次转印电源39，二次转印偏压到二次转印压区，二次转印偏压包括直流成分和交流成分，二次转印辊隙形成在表面被移动的中间转印带31和与第二转印辊36的表面相对设置的二次转印辊36之间。中间转印带。图像形成装置被配置为使得保持在中间转印带表面的调色剂图像通过二次转印辊隙的作用被转印到通过二次转印辊隙的记录纸P上。图像形成装置具有控制部分60，该控制部分60进行控制，使得在中间转印带的表面移动期间以及在不通过二次转印夹持器的记录纸不通过期间，AC部件存在不施加AC分量或AC分量的峰峰值电压低于图像形成期间的变化周期。

9. 发明专利

JP2012237974A Image forming apparatus and image forming method 有权
标题翻译：图像形成装置和图像形成方法
公开(公告)号：JP2012237974A
公开(公告)日：2012-12-06
申请号：JP2012053707
申请日：2012-03-09
申请人： Ricoh Co Ltd , 株式会社リコー
发明人： SUGIMOTO NAOMI , TANAKA SHINYA , IIMURA HARUO , AOKI SHINJI , OGINO YASUHIKO , NAKAMURA KEIGO
IPC分类号： G03G15/16 , G03G15/00
CPC分类号： G03G15/1675
摘要： PROBLEM TO BE SOLVED: To achieve a high quality image without causing image unevenness and an image with a white void, by suppressing occurrence of a white spot while achieving image density sufficient for a depressed portion and a raised portion on a surface of a recording material and by improving transfer performance on a transfer material having a surface irregularities even when toner is deteriorated.SOLUTION: An image forming apparatus includes: a transfer component 36 that comes into contact with a surface of an image carrying unit 31 on which surface a toner image is carried, so as to form a transfer nip therewith; and a power supply 39 that outputs a voltage (transfer bias) for transferring the toner image on the image carrying unit onto a recording material P nipped in the transfer nip. When the toner image on the image carrying unit is transferred to the recording material, a voltage in a transfer direction in which the toner image is transferred from the image carrying unit to the recording material and a voltage of a polarity reverse to that of the voltage in the transfer direction are switched alternately. Further, a voltage time average (Vave) is set to a polarity in the transfer direction in which the toner image is transferred from the image carrying unit to the recording material and is also set to a value closer to a value of the polarity in the transfer direction relative to a medium value (Voff) between a minimum value and a maximum value of the voltage. Then on the basis of toner deterioration information for determining a deteriorated status of toner, a change is made to a cycle frequency of a voltage output from the power supply 39.
摘要翻译：要解决的问题：为了实现高品质图像而不引起图像不均匀和具有白色空白的图像，通过抑制白斑的发生，同时实现足够的图像浓度足以使凹部和图形的表面上的凸起部分记录材料，并且即使当调色剂劣化时也改善具有表面凹凸的转印材料的转印性能。解决方案：图像形成装置包括：传送部件36，其与载体单元31的表面接触，在其上承载有调色剂图像的表面，以便与其形成转印间隙; 以及电源39，其输出用于将图像承载单元上的调色剂图像转印到夹持在转印夹持部中的记录材料P上的电压（转印偏压）。当图像承载单元上的调色剂图像被转印到记录材料上时，将调色剂图像从图像承载单元传送到记录材料的传送方向的电压和与电压的极性相反的极性的电压在传送方向上交替地切换。此外，将电压时间平均值（Vave）设定为调色剂图像从图像承载单元传送到记录材料的传送方向上的极性，并且还被设置为接近于传输方向相对于电压的最小值和最大值之间的介质值（Voff）。然后，基于用于确定调色剂劣化状态的调色剂劣化信息，改变从电源39输出的电压的周期频率。（C）2013，JPO＆INPIT

10. 发明专利

JP2012042832A Transfer device and image formation device 有权
标题翻译：传输设备和图像形成设备
公开(公告)号：JP2012042832A
公开(公告)日：2012-03-01
申请号：JP2010185572
申请日：2010-08-20
申请人： Ricoh Co Ltd , 株式会社リコー
发明人： SUGIMOTO NAOMI , TANAKA SHINYA , TAMIYA TAKAHIRO , SAEKI KAZUCHIKA , IIMURA HARUO , AOKI SHINJI , OGINO YASUHIKO , NAKAMURA KEIGO
IPC分类号： G03G15/16
CPC分类号： G03G15/1675 , G03G15/0189
摘要： PROBLEM TO BE SOLVED: To provide an image forming device in which the occurrence of white spots is prevented with a sufficient image density in each of recessed parts and protrusion parts on a recording paper surface.SOLUTION: In the constitution in which a belt laying-around position in regard to a secondary transfer rear face roller stretching a belt on the inner side of a loop of an intermediate transfer belt (not shown) abuts against a nip forming roller disposed on the outside of the loop of the belt to form a secondary transfer nip, the AC component of a secondary transfer bias to be output and applied to the secondary transfer rear face roller is repeats of rectangular rising pulses and rectangular falling pulses, as shown, and the duration of the falling pulses for shifting a toner having negative chargeability from the belt side to the side of the nip forming roller is longer than that of the rising pulses.
摘要翻译：要解决的问题：提供一种图像形成装置，其中在记录纸表面上的每个凹陷部分和突出部分中以足够的图像密度防止出现白点。解决方案：在相对于在中间转印带（未示出）的环的内侧拉伸带的二次转印背面辊的带的铺设位置抵接在辊隙成形辊设置在带的环的外侧以形成二次转印压区，要输出并施加到二次转印背面辊的二次转印偏压的AC分量重复矩形上升脉冲和矩形下降脉冲，如图所示并且用于将具有负带电性的调色剂从带侧移动到辊隙形成辊侧的下降脉冲的持续时间长于上升脉冲的持续时间。版权所有（C）2012，JPO＆INPIT

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