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1. 发明专利

DE60216014T2 未知
公开(公告)号：DE60216014T2
公开(公告)日：2007-07-05
申请号：DE60216014
申请日：2002-07-11
申请人： RICOH KK
发明人： TAKAHASHI MITSURU , SAWAI YUUJI , OGIYAMA HIROMI , KAWAGOE KATSUYA , SUGINO AKIHIRO , KATOH KOHKI
IPC分类号： G03G9/08 , G03G15/16 , G03G15/01 , G03G15/08
摘要： An image forming apparatus includes a cleaning device (9) for cleaning an intermediate image transfer body (4). A cleaning blade included in the image transfer body cleaning device is formed of fluorocarbon resin or a thin layer of fluorocarbon resin is formed on the surface of the intermediate image transfer body. Further, wax is coated on the intermediate image transfer body or wax or lubricant powder is contained in toner. A moving mechanism holds the cleaning blade spaced from the intermediate image transfer body at least when image formation is not under way.

2. 发明专利

DE60127500D1 未知
公开(公告)号：DE60127500D1
公开(公告)日：2007-05-10
申请号：DE60127500
申请日：2001-08-29
申请人： RICOH KK
发明人： KAWAGOE KATSUYA , MOTOHASHI TOSHIAKI , SAWAI YUUJI , KAYAHARA SHIN , TAKEICHI RYUTA , TAKAHASHI MITSURU , ONO HIROSHI , OGIYAMA HIROMI
IPC分类号： G03G15/16 , G03G21/00
摘要： In an image forming apparatus in which a toner image is formed on an endless image bearing member and the toner image is transferred onto a transfer medium by a transfer device, a belt guide member is fixedly provided at an upstream side of a nip formed between a roller and a transfer roller in a moving direction of an intermediate transfer belt (as the image bear member)such that the belt guide member contacts the underside of the intermediate transfer belt. Thus an occurrence of a toner scatter and a partial omission of a transferred image is suppressed, resulting in an improvement in the quality of the image.

3. 发明专利

GB2202766B DEVELOPING APPARATUS FOR IMAGE RECORDER 未知
公开(公告)号：GB2202766B
公开(公告)日：1990-12-19
申请号：GB8805718
申请日：1988-03-10
申请人： RICOH KK
发明人： OGIYAMA HIROMI
IPC分类号： G03G15/08 , G03G15/09
摘要： A developing apparatus for an electrophotographic copier or the like includes a cylindrical developing sleeve which is rotatable to transport one component magnetic toner to a predetermined developing region where a photoconductive element is positioned. A magnet layer magnetized to have N and S poles which alternate with each other at a predetermined small distance is provided in the vicinity of the surface of the developing sleeve so as to deposit the toner on the magnetic layer. A blade is pressed against the surface of the magnet layer for frictionally charging the toner which is deposited on the magnet layer. A clearance is defined between the surface of the magnet layer and the blade and sequentially reduced in a direction of rotation of the sleeve, whereby the toner is charged and, at the same time, regulated into an even thin layer.

4. 发明专利

DE602007003892D1 未知
公开(公告)号：DE602007003892D1
公开(公告)日：2010-02-04
申请号：DE602007003892
申请日：2007-05-03
申请人： RICOH KK
发明人： OGIYAMA HIROMI , UDA JUNROH , MIMBU RYUUICHI
IPC分类号： G03G15/16
摘要： A transfer-separation device includes an intermediate transfer unit (11), a secondary transfer roller (22), a repulsive roller (16), a transfer unit, and a charge-eliminating/separating member (23). The secondary transfer roller (22) and the repulsive roller (16) form a nip through which the intermediate transfer unit (11) and a recording medium pass. The transfer unit applies a bias voltage of a polarity identical to that of a toner image to the repulsive roller (16) to secondarily transfer the toner image onto the recording medium. The charge-eliminating/separating member (23) separates the recording medium from the intermediate transfer unit (11) by removing charge therefrom. The volume resistance of the repulsive roller (16) is greater than that of the secondary transfer roller (22). The surface resistance of the secondary transfer roller (22) is equal to or greater than 10 6.5 ohm.

5. 发明专利

DE60233197D1 未知
公开(公告)号：DE60233197D1
公开(公告)日：2009-09-17
申请号：DE60233197
申请日：2002-10-23
申请人： RICOH KK
发明人： OGIYAMA HIROMI , KATOH KOHKI , SUGINO AKIHIRO , TAKAHASHI MITSURU , KAWAGOE KATSUYA , SAWAI YUJI
IPC分类号： G03G15/16
摘要： A transfer device (10) transfers a visual image from an image carrier (8) to a recording medium (S). The transfer device (10) includes a first transfer element (10a) that moves and receives the visual image from the image carrier (8) on a first surface of the first transfer element (10a), a second transfer element (3) provided opposite to the first surface of the first transfer element (10a) to pinch and convey the recording medium (S) through a transfer nip part formed between the first surface of the first transfer element (10a) and the second transfer element (3), and a facing member (2,12,22,32) provided on a second surface of the first transfer element (10a) opposite to the first surface of the first transfer element (10a). The facing member (2,12,22,32) faces the second transfer element (3) via the first transfer element (10a). The transfer device (10) further includes a constant-current power supply (4) that applies an electric voltage to a voltage application electrode (2a,12a,22a,32a) such that the visual image on the first surface of the first transfer element (10a) is transferred to the recording medium (S). The voltage application electrode is included in the facing member or in the second transfer element. A constant-current controller (11) controls a current which flows due to the electric voltage, to be constant.

6. 发明专利

DE3808171A1 未知
公开(公告)号：DE3808171A1
公开(公告)日：1988-09-22
申请号：DE3808171
申请日：1988-03-11
申请人： RICOH KK
发明人： OGIYAMA HIROMI
IPC分类号： G03G15/08 , G03G15/09
摘要： A developing apparatus for an electrophotographic copier or the like includes a cylindrical developing sleeve which is rotatable to transport one component magnetic toner to a predetermined developing region where a photoconductive element is positioned. A magnet layer magnetized to have N and S poles which alternate with each other at a predetermined small distance is provided in the vicinity of the surface of the developing sleeve so as to deposit the toner on the magnetic layer. A blade is pressed against the surface of the magnet layer for frictionally charging the toner which is deposited on the magnet layer. A clearance is defined between the surface of the magnet layer and the blade and sequentially reduced in a direction of rotation of the sleeve, whereby the toner is charged and, at the same time, regulated into an even thin layer.

7. 发明专利

DE60127500T2 未知
公开(公告)号：DE60127500T2
公开(公告)日：2008-01-03
申请号：DE60127500
申请日：2001-08-29
申请人： RICOH KK
发明人： KAWAGOE KATSUYA , MOTOHASHI TOSHIAKI , SAWAI YUUJI , KAYAHARA SHIN , TAKEICHI RYUTA , TAKAHASHI MITSURU , ONO HIROSHI , OGIYAMA HIROMI
IPC分类号： G03G15/16 , G03G21/00
摘要： In an image forming apparatus in which a toner image is formed on an endless image bearing member and the toner image is transferred onto a transfer medium by a transfer device, a belt guide member is fixedly provided at an upstream side of a nip formed between a roller and a transfer roller in a moving direction of an intermediate transfer belt (as the image bear member)such that the belt guide member contacts the underside of the intermediate transfer belt. Thus an occurrence of a toner scatter and a partial omission of a transferred image is suppressed, resulting in an improvement in the quality of the image.

8. 发明专利

DE60216014D1 未知
公开(公告)号：DE60216014D1
公开(公告)日：2006-12-28
申请号：DE60216014
申请日：2002-07-11
申请人： RICOH KK
发明人： TAKAHASHI MITSURU , SAWAI YUUJI , OGIYAMA HIROMI , KAWAGOE KATSUYA , SUGINO AKIHIRO , KATOH KOHKI
IPC分类号： G03G9/08 , G03G15/16 , G03G15/01 , G03G15/08
摘要： An image forming apparatus includes a cleaning device (9) for cleaning an intermediate image transfer body (4). A cleaning blade included in the image transfer body cleaning device is formed of fluorocarbon resin or a thin layer of fluorocarbon resin is formed on the surface of the intermediate image transfer body. Further, wax is coated on the intermediate image transfer body or wax or lubricant powder is contained in toner. A moving mechanism holds the cleaning blade spaced from the intermediate image transfer body at least when image formation is not under way.

9. 发明专利

GB2202766A DEVELOPING APPARATUS FOR IMAGE RECORDER 未知
公开(公告)号：GB2202766A
公开(公告)日：1988-10-05
申请号：GB8805718
申请日：1988-03-10
申请人： RICOH KK
发明人： OGIYAMA HIROMI
IPC分类号： G03G15/08 , G03G15/09
摘要： A developing apparatus for an electrophotographic copier or the like includes a cylindrical developing sleeve which is rotatable to transport one component magnetic toner to a predetermined developing region where a photoconductive element is positioned. A magnet layer magnetized to have N and S poles which alternate with each other at a predetermined small distance is provided in the vicinity of the surface of the developing sleeve so as to deposit the toner on the magnetic layer. A blade is pressed against the surface of the magnet layer for frictionally charging the toner which is deposited on the magnet layer. A clearance is defined between the surface of the magnet layer and the blade and sequentially reduced in a direction of rotation of the sleeve, whereby the toner is charged and, at the same time, regulated into an even thin layer.

10. 发明专利

DE3443037A1 未知
公开(公告)号：DE3443037A1
公开(公告)日：1985-06-05
申请号：DE3443037
申请日：1984-11-26
申请人： RICOH KK
发明人： KANNO FUCHIO , SAKAMOTO KOJI , KOBAYASHI KAZUO , YASUDA WATARU , OGIYAMA HIROMI
IPC分类号： G03G15/08 , G03G15/09
摘要： A device for forming a toner film for use in developing an electrostatic latent image on an image bearing member, such as photosensitive member, is provided. A developing sleeve is rotatably provided and a magnet roll is also rotatably provided inside of the sleeve for magnetically attracting a blade of magnetic material to the outer peripheral surface of the sleeve thereby causing the toner carried on the sleeve to be formed into a film of desired thickness and charge. The magnet roll is formed with a plurality of magnetic poles elongated axially and arranged along the periphery of the roll in alternating polarities. Thus, the magnetic attractive force applied by the magnet roll to the blade changes periodically. In the present invention, the frequency of alternating magnetic field applied to the blade is set to be larger than the first order resonant frequency of the blade, thereby allowing to maintain the applied magnetic force as constant as possible.

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