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1. 发明专利

JP2003066708A Developing device and image forming apparatus 审中-公开
标题翻译：开发设备和图像形成装置
公开(公告)号：JP2003066708A
公开(公告)日：2003-03-05
申请号：JP2001259124
申请日：2001-08-29
申请人： Hitachi Ltd , 株式会社日立製作所
发明人： MIYASAKA TORU , SAITO MASAHIKO , TAKEYA MASAHARU , ONISHI KAZUTOMI , YOSHIDA TOMOSHI
IPC分类号： G03G21/00 , G03G15/08
摘要： PROBLEM TO BE SOLVED: To accurately decide the service life of a developing device as well as no toner and to assure prevention of error in use or error in action after deciding the service life. SOLUTION: In the device, a toner quantity detecting means to detect the toner quantity and a toner deficiency generation recording means which is an irreversible recording means are provided. In this case, recording is carried out by the toner deficiency generation recording means when it is detected that the residue quantity of the toner is less than a service life stipulating value by the toner quantity detecting means.
摘要翻译：要解决的问题：确定开发设备的使用寿命以及没有碳粉，并确保使用寿命确定后，防止使用中的错误或操作错误。解决方案：在该装置中，设置有用于检测调色剂量的调色剂量检测装置和作为不可逆记录装置的调色剂缺陷产生记录装置。在这种情况下，当检测到调色剂的残留量小于调色剂量检测装置的使用寿命规定值时，由调色剂缺乏产生记录装置进行记录。

2. 发明专利

JP2001000936A AUTOMATIC CLEANING DEVICE FOR POWDERY EXTRANEOUS MATTER 失效
公开(公告)号：JP2001000936A
公开(公告)日：2001-01-09
申请号：JP17805999
申请日：1999-06-24
申请人： HITACHI LTD
发明人： FUKUCHI KUNIO , YAMAMOTO MASASHI , MIYASAKA TORU , SHIMADA AKIRA , ONISHI KAZUTOMI , OIKAWA AKIKO , MIKAMI KATSUMASA , SASAKI AKIRA
IPC分类号： B08B5/02 , B08B1/04 , B08B5/04 , B08B6/00 , G03G15/08
摘要： PROBLEM TO BE SOLVED: To improve the cleaning efficiency and the clean degree by dividing a cleaning method into processes, to which a powdery extraneous matter is sequentially moved to be automatically cleaned. SOLUTION: An automatic cleaning device 100 is arranged with a plurality of air-tightly sealable cleaning rooms 5 each provided with a cleaning means 7 to remove and clean adhering powder of powdery extraneous matter, so that the powdery extraneous matter is moved to a plurality of the cleaning rooms sequentially by moving means 4 (4a to 4g) to remove and clean the adhering powder of the powdery extraneous matter therein. Thereby the powder of the powdery extraneous matter can be cleaned with high efficiency and high clean degree, realizing the recycling of the powdery extraneous matter and the labor-saving of the cleaning.

3. 发明专利

JPH11133746A DEVELOPING DEVICE 失效
公开(公告)号：JPH11133746A
公开(公告)日：1999-05-21
申请号：JP29818297
申请日：1997-10-30
申请人： HITACHI LTD
发明人： KAMIO KEIJI , SAITO MASAHIKO , OKANO TADASHI , ISHII YOSHITARO , SUZUKI NOBUO , SUZAKI MASABUMI , UKEI SHOJI , MIKAMI KATSUMASA , TAKEYA MASAHARU , ONOSE KATSUYOSHI , IMAZEKI SHUJI , MIYASAKA TORU , YAMAMOTO MASASHI , AONO YOSHINORI , ONISHI KAZUTOMI , OIKAWA AKIKO , NAKANO MASARU , HIRAOKA TSUTOMU , HOSAKA SHINICHI , SUZUKI MOTOYUKI , SHINONAGA YOSHIKATSU , ONODERA HIROYUKI , SHISHIDO KAZUO
IPC分类号： G03G15/08
摘要： PROBLEM TO BE SOLVED: To provide constitution by which a uniform toner thin layer having specified thickness is stably formed on a toner carrier over a long term and to provide a developing device preventing the leakage of toner with simple constitution. SOLUTION: A toner partition plate 72 for dividing toner is provided between a toner retaining chamber 62 in which the scraped toner is accumulated and a toner storing chamber in which the toner is stored, and is formed to be circular-arc shape adaptively to a toner stirring member. Thus, the constitution by which the uniform toner thin layer having the specified thickness is stably formed on the toner carrier over a long term is provided. The leakage of the toner from the developing device is prevented and cleaning work for the device is facilitated. Then, the developing device capable of realizing easy maintenance is made small in size and light in weight and inexpensive with the simple constitution.

4. 发明专利

JP2002328531A ELECTROPHOTOGRAPHIC DEVICE 审中-公开
公开(公告)号：JP2002328531A
公开(公告)日：2002-11-15
申请号：JP2002125183
申请日：2002-04-26
申请人： HITACHI LTD
发明人： MIYASAKA TORU , ONISHI KAZUTOMI , SAITO MASAHIKO , OKANO TADASHI , TAKEYA MASAHARU
IPC分类号： G03G15/01 , G03G15/08
摘要： PROBLEM TO BE SOLVED: To form a stable toner layer even in a one-component developing machine performing development by rotating a developing roll, on which a toner thin layer is formed, from a lower side to an upper side at a position where the developing roll is opposed to a photoreceptor. SOLUTION: This electrophotographic device is provided with a toner supply chamber for supplying toner to a developing roll and a toner recovery chamber for recovering the toner regulated by a regulating blade, and the toner supply chamber and the toner recovery chamber are separated by a sheet type member. Thus, the constitution of the developing machine capable of forming the stable toner layer even in the one-component developing machine performing the development by rotating the developing roll, on which the toner thin layer is formed, from the lower side to the upper side at the position where the developing roll is opposed to the photoreceptor is provided. Furthermore, the developing device is applied to eliminate restrictions on the arrangement of one-component development, thus the more compact and stable electrophotographic device is provided.

5. 发明专利

JPH11102116A IMAGE FORMING DEVICE 失效
公开(公告)号：JPH11102116A
公开(公告)日：1999-04-13
申请号：JP26133797
申请日：1997-09-26
申请人： HITACHI LTD
发明人： MIYASAKA TORU , AONO YOSHINORI , ONISHI KAZUTOMI , SAITO MASAHIKO , OKANO TADASHI , TAKEYA MASAHARU
IPC分类号： G03G15/06 , G03G15/08
摘要： PROBLEM TO BE SOLVED: To restrain secular density fluctuation and irregular density at the time of recording a solid image by setting the rotational circumferential speed of a developing roll higher than the surface speed of a photoreceptor and setting the rotating speed of the developing roll so that toner amount supplied to the photoreceptor may be larger than the toner amount by which sufficient image density is obtained. SOLUTION: The rotational circumferential speed of the developing roll 1 is set to be higher than the surface speed of the photoreceptor 10, and the rotating speed of the roll 1 is set so that the toner amount supplied to the photoreceptor 10 by the roll 1 may be larger than the toner amount by which the sufficient image density is obtained. Furthermore, developing bias is set so that the toner amount at the time of developing may be smaller than the toner amount supplied to the photoreceptor 10 by the roll 1. Thus, when the toner adhesive amount of a toner thin film on the roll 1 is reduced with time, the rate of the shifting of the toner on the roll 1 to the photoreceptor 10 is increased because of the lowering of the electrification amount, so that the toner amount by which an electrostatic latent image on the photoreceptor 10 is developed becomes stable in substance.

6. 发明专利

JPH09305020A DEVELOPING DEVICE AND COLOR ELECTRO-PHOTOGRAPHIC DEVICE 失效
公开(公告)号：JPH09305020A
公开(公告)日：1997-11-28
申请号：JP11895096
申请日：1996-05-14
申请人： HITACHI LTD
发明人： MIYASAKA TORU , ONISHI KAZUTOMI , SAITO MASAHIKO , TAKEYA MASAHARU
IPC分类号： G03G15/08
摘要： PROBLEM TO BE SOLVED: To stabilize the circulation of excessive toner by forming a thin layer of toner on a developing roll. SOLUTION: Excessive toner 9a resulting from the formation of a thin layer of toner on the surface of the developing roll 1 or toner 9a recovered from the developing roll is stirred by a rotary stirring member 4 in a recovery path 25 and, at the same time, it is pushed out into a toner storage chamber 6 to be circulated. The rotary stirring member 4 also acts so as to restrict the reverse flow of the toner 9 in the toner storage chamber 6 to the recovery path 25.

7. 发明专利

JPH09160437A IMAGE FORMING DEVICE 失效
公开(公告)号：JPH09160437A
公开(公告)日：1997-06-20
申请号：JP32420595
申请日：1995-12-13
申请人： HITACHI LTD
发明人： MIYASAKA TORU , ONISHI KAZUTOMI , MIKAMI KATSUMASA , KOIKE HIROYUKI
IPC分类号： G03G15/01 , B65H5/02 , G03G15/00 , G03G15/16 , G03G21/00 , G03G21/16
摘要： PROBLEM TO BE SOLVED: To eliminate the effect exerted on a recording image by the fluctuation of traveling speed given to a photoreceptive belt or an intermediate transfer belt at the contact/uncontact action time of a printing process and to obtain a high-quality image by arranging a belt elongation absorbing mechanism on the downstream side from the belt position of a toner image carrier with which the printing process executing the contact/uncontact action is brought into contact and arranging a belt rotation obstruction member on the upstream side therefrom. SOLUTION: A belt extending mechanism 11 by a spring 13 is arranged on a belt fluctuation absorbing roller 12 arranged at the lower part of a position with which a developing machine is brought into contact. Besides, a belt fluctuation suppressing roller 14 arranged at the upper part of the position with which the developing machine is brought into contact, is used as the driving roller of the photoreceptive belt. Besides, a rotational load imparting member 15 imparting rotational load to this roller and constituting of a leaf spring-state member is arranged. The fluctuation of the photoreceptive belt caused by the contact/uncontact action of the developing machine is absorbed because the roller 12 is reversely rotated and pulled up. The rotational load is imparted to the roller 14 by the imparting member 15 so as to suppress the fluctuation of rotational speed.

8. 发明专利

JPH09160381A DEVELOPING DEVICE 失效
公开(公告)号：JPH09160381A
公开(公告)日：1997-06-20
申请号：JP32420995
申请日：1995-12-13
申请人： HITACHI LTD
发明人： HACHITSUE TOORU , ONISHI KAZUTOMI
IPC分类号： G03G15/08
摘要： PROBLEM TO BE SOLVED: To prevent an image from becoming indistinct, when the remaining amount of toner inside a developing device is reduced, and thereby a specified layer is not formed on a developing roll. SOLUTION: This device is constituted so that a control blade 2 is held in press contact with the developing roll 1 by a specified pressing force of a pressure adjusting spring 3; an angle θ, formed by a perpendicular and a tangent on a contact point where the control blade 2 is held in contact with the developing roll 1, is made possible to be varied with an axis at the contact point of the control blade 2 and the developing roll 1; then the developing device weight detector 7 is made possible to sense the residual toner inside the developing device by weight of the developing device and to move the control blade 2 up and down across a fulcrum 9; the angle formed by the perpendicular and the tangent on the contact point where the control blade 2 is held in contact with the developing roll 1, is varied corresponding to the residual toner inside a hopper 10; therefore the toner layer of the specific thickness is formed on the developing roll 1, regardless of the decrease in the remaining amount of toner.

9. 发明专利

JPH08297411A DEVELOPING DEVICE 失效
公开(公告)号：JPH08297411A
公开(公告)日：1996-11-12
申请号：JP10340595
申请日：1995-04-27
申请人： HITACHI LTD
发明人： SAITO MASAHIKO , MIYASAKA TORU , ONISHI KAZUTOMI , HACHIJIYOU TOORU , TADOKORO HIROYUKI , WAKAMATSU KAZUHIRO
IPC分类号： G03G15/08
摘要： PURPOSE: To provide a developing device capable of forming a stable toner layer having a specified thickness of the toner supplied especially on the toner carrier of a one-component developing device suitable for user maintenance by means of a friction controlling member and realizing a stable toner electrification. CONSTITUTION: The controlling member 24 forming the toner thin layer on the toner carrier 21 by being brought into press-contact with the toner carrier 21 is constituted of a means for pressing the member 24 to a toner carrier 21 side and a toner seal member 26 preventing the toner entering the peripheral part of the pressing means. Since the member 24 is provided with the means for pressing the member 24 to the toner carrier 21 side and the means for preventing the toner entering the pressuring means 25, so that toner flow becomes adequate, the toner is prevented from entering the peripheral part of the means 25, and pressing force is stabilized, the toner thin layer which is always stable can be formed. Thus, the compact developing device suitable for user maintenance can be provided at a low cost with a simple constitution.

10. 发明专利

JPH0651620A DEVELOPING DEVICE 失效
公开(公告)号：JPH0651620A
公开(公告)日：1994-02-25
申请号：JP20476292
申请日：1992-07-31
申请人： HITACHI LTD
发明人： MIYASAKA TORU , SUZUKI YASUAKI , ONISHI KAZUTOMI
IPC分类号： G03G15/08
摘要： PURPOSE:To realize a device constitution for forming the toner thin layer of stable thickness without damaging a developing roll, with a compact and single constitution, in a one-component developing device. CONSTITUTION:A regulating member 5 is in a shape having the bent part of an L-type, a U-type, etc.. and the regulating member 5 and a pressurizing means 4 for pressing/pressurizing the regulating member 5 on the developing roll 3 are parallelly disposed. Moreover, the regulating member 5 is arranged so that the bent part of the regulating member 5 comes to the upstream side in the rotational direction of the developing roll at a position where the regulating member 5 comes into contact with the developing roll 3. On the other hand, the bent part of the regulating member 5 located on the upstream side in the rotational direction of the developing roll at the position where the regulating member 5 comes into contact with the developing roll 3, is a curved surface about R 0.3-5. Further, as the regulating member 5 having the bent part of the L-type or the U-type or so, a member manufactured driving aluminum, etc., is used. In this method, the contact part of the regulating blade 5 is in the shape of the curved surface, so that a proper toner layer can be formed on the developing roll without damaging its surface.

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