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1. 发明专利

JP2003248389A IMAGE FORMING APPARATUS 审中-公开
公开(公告)号：JP2003248389A
公开(公告)日：2003-09-05
申请号：JP2003041553
申请日：2003-02-19
申请人： RICOH KK
发明人： TAKANO SATOSHI , ARAI MAKOTO , SOMIYA TOKUMASA , KONSHIYA MASAKUNI
IPC分类号： G03G21/00 , G03G15/00 , G03G15/16 , G03G21/14
摘要： PROBLEM TO BE SOLVED: To provide an image forming apparatus capable of realizing the prevention of the transfer of toner adhering to an image carrier to a transfer belt and the removal of the toner transferred to the transfer belt without making copying speed low. SOLUTION: A transfer carrying device 100 is provided with the image carrier 1 for carrying a toner image, an endless carrying means 3 being a middle resistor for carrying transfer material P, and a transfer charge applying means 8 for imparting charge to the carrying means 3 in order to transfer the toner image on the image carrier 1 to the transfer material P. The device 100 is equipped with a control means 17 applying the charge having the same polarity as that at the time of transferring from the applying means 8 to the carrying means 3 in a state where the transfer material P does not exist at a transfer nip position L where the carrying means 3 comes into contact with the image carrier 1. COPYRIGHT: (C)2003,JPO

2. 发明专利

JP2001209290A RECOVERY TONER TRANSPORT DEVICE 失效
公开(公告)号：JP2001209290A
公开(公告)日：2001-08-03
申请号：JP2000020379
申请日：2000-01-28
申请人： RICOH KK
发明人： SANPEI ATSUSHI , KONSHIYA MASAKUNI
IPC分类号： G03G21/10 , G03G15/08
摘要： PROBLEM TO BE SOLVED: To provide a recovery toner transport device which can transport toner efficiently, without leaving recovery toner in a cleaning unit. SOLUTION: The angle θ to the vertical direction of a scraper 26 which abuts on the free end on the magnet roller 24 which collects and transports toner from the surface of a photosensitive drum 11 is set at a angle below the angle of repose of the magnetic toner transported. The toner which is not transported by the magnetism of the magnet roller 24 falls by the dead weight by the inclination of the scraper 26, is again caught and transported by the magnetism of the magnet roller 24, and does not remain in the cleaning unit 13.

3. 发明专利

JPH10104965A IMAGE FORMING DEVICE 失效
公开(公告)号：JPH10104965A
公开(公告)日：1998-04-24
申请号：JP27557596
申请日：1996-09-26
申请人： RICOH KK
发明人： KONSHIYA MASAKUNI
IPC分类号： G03G15/16 , B65H5/36 , G03G15/00
摘要： PROBLEM TO BE SOLVED: To prevent the transfer failure or reduction in image quality by providing a means for holding a guide member for guiding a transfer paper sent from a resist roller to a transfer equipment in such a manner as to be expansible and contractible in the axial direction of a latent image carrier. SOLUTION: The regulating means 7a of a holding means 7 holds a guide member 6 in such a manner that the downstream side, to the advancing direction shown by an arrow B of a transfer paper P, is expansible and contractible in the axial direction (the lateral direction of the transfer paper) of a prescribed direction of the rotating shaft 1b of a latent image carrier 1, and rotatable in a vertical direction shown by an arrow D with the upstream side rotating shaft 7a1 as a fulcrum. Namely, at least the downstream side of the member 6 is laid in the state where the axial expansion and contraction are not regulated. The downstream side end part of the member 6 is pressed down or drawn up in the direction D by the tip of a screw 7a2 screwed to a fixing member 3b integrally protruded from the wall surface on this side and deep side of a case 3a by rotating the screw 7a2, whereby the posture of the member 6 can be set to an optimum state according to the ambient temperature change or the kind of transfer paper P, and regulated so that the transfer paper P can be properly guided.

4. 发明专利

JPH1055115A IMAGE FORMING DEVICE 失效
公开(公告)号：JPH1055115A
公开(公告)日：1998-02-24
申请号：JP22596196
申请日：1996-08-08
申请人： RICOH KK
发明人： KONSHIYA MASAKUNI
IPC分类号： G03G15/14 , G03G15/16
摘要： PROBLEM TO BE SOLVED: To discharge electricity toward a transfer paper side and being necessary and sufficient for a transfer, even if the gap between a transfer corona wire and a charge regulating member is narrow by providing a conductive member integrally arranged in the charge regulating member. SOLUTION: A shield case 3 surrounds the transfer corona wire 2 extended to face a toner image carrier 1. In the top opening part, 3a of the case 3, an opening width on the entrance side of a transfer paper P is regulated by the charge regulating member 4. A region corresponding to the opening part, 3a is of a transferring part. The charge regulating member 4 and a guiding member 6 are integrally stuck to the conductive member 5. The top end part 4a of the regulating member 4 is constituted to make the distance up to the top end part 5a of the conductive member 5 shorter than that up to the surface 1a of the toner image carrier 1. When the regulating member 4 is negatively electrified, electricity is first surely discharged between the top end part, 5a of the conductive member 5 and the regulating member 4, without being discharged between the surface 1a of the toner image carrier 1 and the regulating member 4.

5. 发明专利

JPH08234586A IMAGE FORMING DEVICE 失效
公开(公告)号：JPH08234586A
公开(公告)日：1996-09-13
申请号：JP6184895
申请日：1995-02-24
申请人： RICOH KK
发明人： KONSHIYA MASAKUNI
IPC分类号： G03G21/00 , G03G15/16 , G03G15/20 , G03G21/10
摘要： PURPOSE: To eliminate various kinds of failures caused by the residual toner stuck on a transfer belt, in an electrophotographic image forming device provided with the transfer belt for transporting the transfer paper to the transfer position of a photoreceptor. CONSTITUTION: This image forming device is provided with the transfer belt 2 arranged attachably to and detachably from the photoreceptor surface for transporting the transfer paper to the transfer position of the photoreceptor 1 surface, a transfer bias providing means 6 for applying the bias voltage to the transfer belt 2, a cleaning blade 11 for cleaning the surface in contact with the surface of the transfer belt 2, a transfer belt toner density detection means 15 arranged on the downstream side from the cleaning belt 11 for detecting the toner density on the transfer belt 2 surface, and a control part 30 for performing the specified control based on the detection result of the transfer belt toner density detection means 15.

6. 发明专利

JPH07248693A IMAGE FORMING DEVICE 失效
公开(公告)号：JPH07248693A
公开(公告)日：1995-09-26
申请号：JP32884894
申请日：1994-12-28
申请人： RICOH KK
发明人： TAKANO SATOSHI , ARAI MAKOTO , SOMIYA TOKUMASA , KONSHIYA MASAKUNI
IPC分类号： G03G21/14 , G03G15/16 , G03G21/00
摘要： PURPOSE:To provide an image farming device capable of preventing transfer of toner stuck to an image carrier to a transfer belt and eliminating the toner transferred to the transfer belt without reducing the copying speed. CONSTITUTION:In a transfere carrier device 100 having an image carrier 1 for carrying a toner image, an endless carrier means 3 which is a medium resistance body for carrying a transfer material P and a transfer electric charge applying means 8 for applying electric charge to the endless carrier means 3 in order to transfer a toner image applied on the image carrier 1 to the transfer material P, a control means 17 is provided for applying electric charge having the same polarity as at the time of transfer from the transfer electric charge applying means 8 to the endless carrier means 3 in a state where no transfer material P exists in a transfer nip position L where the endless carrier means 3 and the image carrier 1 make contact with each other.

7. 发明专利

JPH06348145A TRANSFER BELT DEVICE 失效
公开(公告)号：JPH06348145A
公开(公告)日：1994-12-22
申请号：JP14046993
申请日：1993-06-11
申请人： RICOH KK
发明人： KUTSUWADA AKIO , KONSHIYA MASAKUNI
IPC分类号： G03G15/16
摘要： PURPOSE:To prevent toner scattering by providing a feedback means for feeding back the current from a driven roller. CONSTITUTION:A power source device 16 applies voltage to an applying roller 14 from a power source. A current controller compares the current I1 fed to a transfer belt 11 from the power source via the applying roller 14 with the current I2 fed back from the transfer belt 11 via a feedback roller 15 and a driven roller 13, and it controls the output of the power source so that the difference (I1-I2) becomes a fixed value. The current flowing to a photoreceptor 17 from the transfer belt 11 is kept constant, and a toner image can be transferred under the invariably stable transfer condition. Not only a current is returned to the power source device 16 from the transfer belt 11 via the feedback roller 15, but also a current is returned to the power source device 16 from the transfer belt 11 via the driven roller 13, the sum of these currents becomes the current I2, thus the potential of the driven roller 13 is lowered, and the occurrence of toner scattering is reduced.

8. 发明专利

JPH05100606A IMAGE FORMING DEVICE 失效
公开(公告)号：JPH05100606A
公开(公告)日：1993-04-23
申请号：JP28560091
申请日：1991-10-04
申请人： RICOH KK
发明人： TANAKA MASARU , KONSHIYA MASAKUNI
IPC分类号： G03G15/08 , G03G21/00 , G03G21/10
摘要： PURPOSE:To prevent toner accumulated near a seal provided on the lower edge of a casing aperture part from being scattered in an image forming device when a cleaning device is taken out of a device main body without making the device larger. CONSTITUTION:A plate-like toner receiving member 21 which extends exceeding the right under part of the leading edge of the seal 4 and extends to the vicinity of the surface of a photosensitive drum 1 is provided. The toner receiving member 21 is fixed to the edge part of a holder 22 supported to freely slide on a guide rail whose base end part is formed in a unit guide casing 20 so as to be attached to/detached from the casing 20.

9. 发明专利

JP2000010452A TONER CARRYING DEVICE 失效
公开(公告)号：JP2000010452A
公开(公告)日：2000-01-14
申请号：JP19507898
申请日：1998-06-25
申请人： RICOH KK
发明人： SHIRAKI TAKAMASA , KONSHIYA MASAKUNI , SANPEI ATSUSHI
IPC分类号： G03G21/10 , G03G15/08
摘要： PROBLEM TO BE SOLVED: To carry toner while preventing the scattering of the toner by rotating a screw member with respect to a magnetic force generating member. SOLUTION: The magnetic force generating member 29 is composed of a bar-like magnetic member and attracts the toner by magnetic force. One end 29a of the member 29 is coupled with a bearing 33, and the other end 29b is fixed in a cleaning device. A scraper 37 scraping the toner attracted to the member 29 abuts on the other end 29b. A screw member 31 is spirally constituted and arranged to be wound around the member 29. One end 31a of the member 31 is held by the bearing 33, and the member 31 is driven through a driving transmission gear 35 and rotated with the member 29 as center. An other end 31b of the member 31 is extended to the front of the scraper 37. Whatever non-magnetic material can be used as material constituting the member 31.

10. 发明专利

JPH11231748A IMAGE FORMING DEVICE 失效
公开(公告)号：JPH11231748A
公开(公告)日：1999-08-27
申请号：JP5282198
申请日：1998-02-18
申请人： RICOH KK
发明人： ITO CHIKASHI , KONSHIYA MASAKUNI , TAKANO SATOSHI
IPC分类号： G03G21/10 , G03G15/08
摘要： PROBLEM TO BE SOLVED: To provide an image forming device with which high-quality image formation is performed by normally functioning an air pump by preventing toners residual on the inner walls of the elastic pipe or the like of a mixed air conveying means from flowing back to the side of the air pump even when vibrations are applied after the stop of the air pump. SOLUTION: This device is composed of a developing means 2 for forming a toner image by developing an electrostatic latent image formed on an image carrier 1, air pump 3 for supplying a gas for fluidizing toners T to be supplied to the developing means 2 while circulating them, mixed air conveying means 4 for conveying the mixture of toners T and the gas and forming a circulation route for circulating the gas while being connected to an inhale port 3a and an exhale port 3b of the air pump 3, and check means 5 provided on the side of the mixed air conveying means 4 connected to the exhale port 3b so as to prevent the back flow of toners T.

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