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1. 发明专利

JP2000221811A CLEANING DEVICE 失效
公开(公告)号：JP2000221811A
公开(公告)日：2000-08-11
申请号：JP2353099
申请日：1999-02-01
申请人： MATSUSHITA ELECTRIC IND CO LTD
发明人： TAGUCHI HIROCHIKA
IPC分类号： G03G15/16 , G03G15/08
摘要： PROBLEM TO BE SOLVED: To provide a cleaning device making the negative charge, the current flowing in a paper sheet transfer roller or the like prevented as a result of the electric charge injection to toner at the time of cleaning the paper sheet transfer roller. SOLUTION: This is the cleaning device cleaning the toner 7 stuck on the paper sheet transfer roller 25. Accordingly, the device is provided with the cleaning roller 26 consisting of a base material part 26a provided with conductivity and a resistor layer 26b being formed on a periphery of the base material part 26a provided with a specified electric resistance formed on a periphery of the base material part 26, and rotating held in contact with the paper sheet transfer roller 25. The device is provided with a cleaning power source 27 applying cleaning bias voltage in polarity opposite to the static charge polarity of the toner 7 to the base material 26a. Moreover, the device is provided with a cleaning blade 31 removing the toner 7 shifted from the paper sheet transfer roller 25 to the surface on the resistor layer 26b of the cleaning roller 26.

2. 发明专利

JPH10149018A DEVELOPING DEVICE 失效
公开(公告)号：JPH10149018A
公开(公告)日：1998-06-02
申请号：JP30611296
申请日：1996-11-18
申请人： MATSUSHITA ELECTRIC IND CO LTD
发明人： KITAHARA TOSHIAKI , TAGUCHI HIROCHIKA , SHIMAZAKI HIROMITSU , TSURU TETSUHIRO
IPC分类号： G03G15/08
摘要： PROBLEM TO BE SOLVED: To provide a developing device which can prevent deterioration such as melting or deformation of toner seal members caused by permeation of toner and also toner leak from the developing device and poor image formation performance resulting from deterioration of the toner seal members. SOLUTION: A developing device 1 is equipped with a toner holder 10 in the form of approx. circular column borne in a housing 6, toner seal members 2 installed slidably on the side faces of the toner holder ends, and toner accommodated in the housing 6. Each toner seal member 2 is equipped with a resilient foaming body 2a and a skin layer 2b which is formed on the foaming body 2a slide contact surface with the toner holder 10 and does not admit permeation of the toner.

3. 发明专利

JPH09305013A NON-MAGNETIC ONE-COMPONENT DEVELOPING DEVICE 失效
公开(公告)号：JPH09305013A
公开(公告)日：1997-11-28
申请号：JP11761596
申请日：1996-05-13
申请人： MATSUSHITA ELECTRIC IND CO LTD
发明人： TSURU TETSUHIRO , SHIMAZAKI HIROMITSU , GOTO YOSHIHIRO , NODA KAZUHIKO , TAGUCHI HIROCHIKA
IPC分类号： G03G15/00 , G03G15/06 , G03G21/14
摘要： PROBLEM TO BE SOLVED: To eliminate the lowering of the density not only at the trailing edge of an image but also at the leading edge of the image by controlling a switching means between image forming time when an electrostatic latent image is made visualizable and image non-forming time when the latent image is not made visualizable. SOLUTION: A toner supply roller 6 is obtained by forming a conductive foaming body around a metallic shaft 6a and toner supply bias power sources 25a and 25b are connected to the shaft 6a through a toner supply bias switching means 26. Thus, a toner supply bias value is different from the image forming time and the image non-forming time is impressed. When it is assumed that developing bias voltage impressed on a developing roller 5 is VB and toner supply bias voltage is VSR, VB and VSR have the same polarity, and they satisfy the relation of |VB| |VSR| at the image non-forming time, or VB and VSR have the same polarity and satisfy the relation of |VB|

4. 发明专利

JPH09297499A ELECTROPHOTOGRAPHIC DEVICE 失效
公开(公告)号：JPH09297499A
公开(公告)日：1997-11-18
申请号：JP11250396
申请日：1996-05-07
申请人： MATSUSHITA ELECTRIC IND CO LTD
发明人： TAGUCHI HIROCHIKA , SHIMAZAKI HIROMITSU , GOTO YOSHIHIRO , NODA KAZUHIKO , TSURU TETSUHIRO
IPC分类号： G03G21/00 , G03G21/16
摘要： PROBLEM TO BE SOLVED: To eliminate a failure in contact caused by variation in the dimension of the contact part of a shaft with a terminal by allowing the terminal consisting of a conductive member to press-contact with the part formed to a tapered shape of the shaft provided inside a photoreceptor drum. SOLUTION: A conductive elastic body grounding terminal 4 is fixed in a flange 2, electrically grounded in the photoreceptor drum 1 and brought into electrical contact with the tapered part of a conductive flange shaft 3 at two places with an equal interval. At this time, each deviation in the length (f) of the conductive flange shaft 3, the attachment position (d) of the conductive elastic body grounding terminal 4 and the length (b) of the neck of the grounding terminal 4 is specified, so that the failure in the contact of the shaft 3 with the grounding terminal 4 never occurs. Further, force exerted from the ground terminal 4 to the shaft 3 is applied toward the center of the shaft 3 from two upper and lower places. Thus, the shaft 3 is never shifted from the center of the drum 1, because the sum total of the force becomes vectorially zero.

5. 发明专利

JPH09146430A ELECTROPHOTOGRAPHIC DEVICE 失效
公开(公告)号：JPH09146430A
公开(公告)日：1997-06-06
申请号：JP30410395
申请日：1995-11-22
申请人： MATSUSHITA ELECTRIC IND CO LTD
发明人： TAGUCHI HIROCHIKA , SHIMAZAKI HIROMITSU , GOTO YOSHIHIRO , NODA KAZUHIKO , TSURU TETSUHIRO
IPC分类号： G03G21/08
摘要： PROBLEM TO BE SOLVED: To provide an electrophotographic device equipped with a static eliminator having the capability of extending the service life of a photosensitive member and maintaining a good image over a long term by keeping energy at a specified value on the surface of the photosensitive member at a static elimination process on the operation of the static eliminator. SOLUTION: The electrification wire 2a of an electrifier 2 laid in the vicinity of a photosensitive member 3 generates a corona discharge, thereby evenly electrifying the photosensitive member 3. A static eliminator 12 eliminates electric charge residual on the photosensitive member 3. Furthermore, an LED array is used for an irradiation means to form a static latent image under the irradiation of light to the electrified photosensitive member 3, and the energy of the light on the surface thereof is taken at E2. Also, an LED is used for the static eliminator 12 and the energy of light on the surface of the photosensitive member 3 is taken at E1. In this case, the values of E2 and E1 are determined so as to satisfy a relationship as 5×E2>E1>=E2. According to this construction, the occurrence of an image defect due to the optical fatigue of the photosensitive member 3 is prevented.

6. 发明专利

JPH09106172A NONMAGNETIC ONE-COMPONENT DEVELOPING DEVICE 失效
公开(公告)号：JPH09106172A
公开(公告)日：1997-04-22
申请号：JP26262195
申请日：1995-10-11
申请人： MATSUSHITA ELECTRIC IND CO LTD
发明人： SHIMAZAKI HIROMITSU , TSURU TETSUHIRO , TAGUCHI HIROCHIKA , NODA KAZUHIKO , GOTO YOSHIHIRO
IPC分类号： G03G15/06 , G03G15/08
摘要： PROBLEM TO BE SOLVED: To provide a nonmagnetic one-component developing device having a uniform image characteristic and excellent reliability with less influence of an environmental change by reducing the unevenness of the electrostatic charge quantity of toner on a developing roller and the layer thickness of the toner to the developing roller due to variations of temperature and humidity. SOLUTION: The nonmagnetic one-component developing device 1 is provided with the developing roller 8 whose surface has a formed nonmagnetic one- component toner layer and to which a developing bias voltage is applied, a toner supplying roller 10 disposed in contact with the developing roller 8, in its rear and rotated to supply the toner 6 to the roller 8 and a developing blade 13 disposed in the upper part of the roller 8 and coming into press-contact with the roller 8, to regulate a toner quantity. Further, the developing device 1 is provided with toner supplying roller bias supply 1A as a constant current power source for applying a constant current between the toner supplying roller 10 and the developing roller 8, to obtain the uniform image characteristic and high reliability.

7. 发明专利

JP2001265136A IMAGE FORMING DEVICE 失效
公开(公告)号：JP2001265136A
公开(公告)日：2001-09-28
申请号：JP2000073823
申请日：2000-03-16
申请人： MATSUSHITA ELECTRIC IND CO LTD
发明人： TAGUCHI HIROCHIKA
IPC分类号： G03G15/16
摘要： PROBLEM TO BE SOLVED: To apply an optimum transfer bias on a transfer roller in a stable state, as for an image forming device. SOLUTION: The image forming device is provided with an electrifying means for uniformly and electrifying the surface of a photoreceptor drum, an exposure means for irradiating the surface of the photoreceptor drum electrified by the electrifying means with exposure light according to with image data and forming an electrostatic latent image, a developing means for developing electrostatic latent image formed on the photoreceptor drum, so as to form a toner image, an intermediate transfer belt 11 to which the toner picture is transferred, a transfer roller 14 for transferring the toner image transferred to the intermediate transfer belt 11 to a printing paper, and a cleaning means 15 for removing toner sticking on the transfer roller 14, and the resistance value of the transfer roller 14 is measured based on a current value flowing through the cleaning means 15, which comes into contact with the transfer roller 14 separated from the intermediate transfer belt 11.

8. 发明专利

JPH11272087A Transfer unit and electrophotographic device adopting same 失效
标题翻译：传送单元和电子显示装置
公开(公告)号：JPH11272087A
公开(公告)日：1999-10-08
申请号：JP7014998
申请日：1998-03-19
申请人： Matsushita Electric Ind Co Ltd , 松下電器産業株式会社
发明人： TAGUCHI HIROCHIKA
IPC分类号： G03G15/16 , G03G21/18
摘要： PROBLEM TO BE SOLVED: To provide a transfer unit capable of performing power supply for cleaning means and transfer means by a single power source, and stabilizing transfer bias of the transfer means.
SOLUTION: This transfer unit 23 is provided with a transfer roller 24 rotating while holding a recording medium 19 in cooperation with an intermediate transfer body 15 and transferring synthetic images formed on the intermediate transfer body 15 on the recording medium 19, a cleaning roller 25 held in rotary contact with the transfer roller 24 for cleaning the transfer roller 24 by attract/ removing a toner 7 stuck on the transfer roller 24, and the high voltage power source 27 generating the voltage in polarity opposite to the charged polarity of the toner 7, impressing transfer bias on the transfer roller 24, impressing the cleaning bias becoming the potential differential larger than the potential differential of the transfer bias with respect of the toner 7 on the cleaning roller 25 and forming the potential gradient between the transfer roller 24 and the cleaning roller 25.
COPYRIGHT: (C)1999,JPO
摘要翻译：要解决的问题：提供能够通过单个电源执行清洁装置和传送装置的电力供应的转印单元，以及稳定转印装置的转印偏压。解决方案：该传送单元23设置有转印辊24，转印辊与中间转印体15配合保持记录介质19，并将形成在中间转印体15上的合成图像转印在记录介质19上，清洁辊25保持与转印辊24旋转接触，用于通过吸附/去除粘附在转印辊24上的调色剂7来清洁转印辊24，以及产生极性与调色剂7的带电极性相反的电压的高压电源27，在转印辊24上施加转印偏压，使得清洁偏压成为大于转印偏压相对于清洁辊25上的调色剂7的电位差的电位差，并且形成转印辊24和清洁辊之间的电位梯度辊25。

9. 发明专利

JPH11202677A FIXING DEVICE FOR IMAGE FORMING DEVICE 失效
公开(公告)号：JPH11202677A
公开(公告)日：1999-07-30
申请号：JP565698
申请日：1998-01-14
申请人： MATSUSHITA ELECTRIC IND CO LTD
发明人： MATSUZAKI KEIICHI , SHIMAZAKI HIROMITSU , TAGUCHI HIROCHIKA
IPC分类号： G03G15/20
摘要： PROBLEM TO BE SOLVED: To provide a fixing device for an image forming device by which the occurrence of the offsetting of toner for a belt at the time of both-side printing is prevented even right after when a heat roller starts rotation from a standby state and also the simplification of an oil applying mechanism, the increase of printing speed and miniaturization are attained. SOLUTION: As for the fixing device forming a nip part for recording paper 18 by the heat roller 11 and an endless belt 12; when the central value of the control temperature of the surface of the endless belt 12 of a part where a heating roller 13 and the endless belt 12 are brought into contact and which is not brought into contact with the heat roller 11 at standby time is set as T1 and the central value of the control temperature of printing time is set as T2, their relation is set to be T1>=T2, and also when the dissolving start temperature of the toner is set as Tm, their relation is set to be Tm>=T2.

10. 发明专利

JPH10333447A CLEANING DEVICE 失效
公开(公告)号：JPH10333447A
公开(公告)日：1998-12-18
申请号：JP13638497
申请日：1997-05-27
申请人： MATSUSHITA ELECTRIC IND CO LTD
发明人： TAGUCHI HIROCHIKA , SHIMAZAKI HIROMITSU , NODA KAZUHIKO , TSURU TETSUHIRO , KITAHARA TOSHIAKI , MATSUZAKI KEIICHI
IPC分类号： G03G15/01 , G03G15/16
摘要： PROBLEM TO BE SOLVED: To obtain a long-lived cleaning device capable of stably maintaining sufficient cleaning performance by providing an electric conductive rotary member for electrically absorbing remaining toner left on a transfer belt. SOLUTION: The cleaning device 26 removes the remaining toner 31 stuck to the transfer belt 25a. In the cleaning device 26, a cleaning bias voltage of 3-7 kV which has a polarity opposite to that of the charge of toner is applied to an electric conductive cleaning member 26a. On the circumference of this member 26a, a middle resistor 26b is formed by coating, to make the surface roughness of the resistor 26b 2-10 μm RZ. Thus, the close contactness of the surface of the middle resistor 26b with the surface of the transfer belt 25a is enhanced. The middle resistor 26b has a resistance value of 10 -10 Ω and prevents the reverse charging of the residual toner 31, due to the injection of the electric charge by the cleaning bias voltage supplied from a cleaning high-voltage power source 27.

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