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1. 发明专利

JPH0968911A IMAGE FORMING DEVICE 失效
公开(公告)号：JPH0968911A
公开(公告)日：1997-03-11
申请号：JP24869695
申请日：1995-09-01
申请人： RICOH KK
发明人： KIMURA NORIYUKI , KANEKO TOSHIO , KUROTAKA SHIGEO , MOTOHASHI TAKESHI , AOKI KATSUHIRO , FUJISHIRO TAKATSUGU , AKAFUJI MASAHIKO
IPC分类号： G03G15/01 , G03G15/08 , G03G21/16
摘要： PROBLEM TO BE SOLVED: To individually remove developing units by using developing unit removing auxiliary members separate from the developing units, in an image forming device provided with a rotary developing device having plural developing units. SOLUTION: The respective developing units 22 of the rotary developing device 4 are removed from the image forming device by using the auxiliary members for removing 60 provided separately from the respective developing units. Thus, the developing device and the image forming device can be made compact and inexpensive. Moreover, the workability of maintenance, exchange, etc., of the developing units 22 is improved by the auxiliary members 60 and a running cost can be reduced.

2. 发明专利

JPH04242779A LATENT IMAGE CARRIER DEVICE 失效
公开(公告)号：JPH04242779A
公开(公告)日：1992-08-31
申请号：JP41752590
申请日：1990-12-28
申请人： RICOH KK
发明人： MIZUSAWA MASAKO , KANEKO TOSHIO
IPC分类号： G03G15/02 , G03G15/16 , G03G21/00 , G03G21/16
摘要： PURPOSE:To uniformly maintain the contact pressure between a latent image carrier and a contact member with a simple structure by extending the range of material selection for contact members such as an electrifying roller and a transfer roller. CONSTITUTION:Protruding stepped parts 2a, 2b are formed on both end parts of a driving roller 2, respectively, and an elastic layer 12 is provided between the outer circumference of the axially inside part from each protruding stepped part 2a, 2b and a latent image carrier 1. The latent image carrier 1 is pressed onto an electrifying roller 3 and a transfer roller 6 which are contact members by this elastic layer.

3. 发明专利

JPH04215680A TRANSFER ROLLER 失效
公开(公告)号：JPH04215680A
公开(公告)日：1992-08-06
申请号：JP41092290
申请日：1990-12-14
申请人： RICOH KK
发明人： KANEKO TOSHIO , FUKAGAWA NAOMI
IPC分类号： G03G15/16
摘要： PURPOSE:To obtain a transfer roller applying the light and uniform pressure to a transfer material when the transfer material is pinched between a latent image carrier and the transfer roller so that a transfer image with no transfer omission or transfer drift can be obtained. CONSTITUTION:A transfer roller 5 is provided with an elastic material such as a hair-planted brush or sponge at the center section 53 on a core metal 50 to form an elastic region, and a material with high resistance and a large friction coefficient is provided at both end sections to form regions with no elastic deformation practically. The length of the center section in the axial direction is set nearly equal to the maximum horizontal size of the transfer paper 10 used in an electrophotographic copying machine. When the transfer paper 10 enters a transfer nip, the surface of the center section of the transfer roller 5 kept in contact with the transfer paper 10 is sunk and made thin by the thickness of the transfer paper 10, and the light and uniform pressure in the axial direction is applied to the transfer paper 10.

4. 发明专利

JPH04144359A GRAPHIC OUTPUT DEVICE 失效
公开(公告)号：JPH04144359A
公开(公告)日：1992-05-18
申请号：JP26732190
申请日：1990-10-04
申请人： RICOH KK
发明人： KANEKO TOSHIO , HANIYU YOSHIAKI , KUMAZAKI HITOMI
IPC分类号： G03G15/01 , B41J2/44 , G03G15/04 , G06T5/30 , H04N1/40 , H04N1/409
摘要： PURPOSE:To realize always stable print processing by providing a discrimination means discriminating a threshold level of a low density part and a high density part of an output picture and a correction means correcting the luminance modulation processing of anti-aliasing processing based on the result of discrimination by the discrimination means on the device. CONSTITUTION:A CPU 202 stores a PLD language received by a receiver 201 to a RAM 204 through an internal system bus 203 according to a program stored in a ROM 205. When the PLD language by one page is received and stored in the RAM 204, the anti-aliasing processing is applied to a graphic element in the RAM 204 to store multi-value R, G, B image data to a plane memory section of a page memory 206 (the page memory 206 consists of R, G, B plane memory sections and a characteristic information memory section). A data in the page memory 206 is sent to a picture processor 400 via a transmitter 207.

5. 发明专利

JPH03129364A METHOD FOR CORRECTING DETERIORATION OF PHOTOSENSITIVE BODY WITH TIME 失效
公开(公告)号：JPH03129364A
公开(公告)日：1991-06-03
申请号：JP26619989
申请日：1989-10-16
申请人： RICOH KK
发明人： KANEKO TOSHIO
IPC分类号： G03G15/00 , G03G21/00
摘要： PURPOSE:To exactly correct the deterioration of the photosensitive body with time by measuring the accumulated revolving speed of the photosensitive body and correcting the conditions for forming images by the quantity which is preset with respect to the respective accumulated revolving speeds at every passage of the set specified revolving speed. CONSTITUTION:The accumulated revolving speed of the photosensitive body is measured and the conditions for forming images are corrected by the quantity which is preset with respect to the respective accumulated revolving speeds at every time when the accumulated revolving speed passes the preset specified revolving speed. Namely, the accumulated revolving speed of the photosensitive body is corrected by the preset quantity for each of the specified revolving speeds of the photosensitive body, by which the same correction of the image forming conditions is executed with the accumulated revolving speed of the same photosensitive body regardless of whether the continuous image formation is frequent or the image formation of a small number of sheets, such as one sheet or two sheets, is frequent in the form of the copying or printing to the attainment of the above-mentioned accumulated revolving speed. The exact correction is executed in this way.

6. 发明专利

JPH0321909B2 失效
公开(公告)号：JPH0321909B2
公开(公告)日：1991-03-25
申请号：JP22663182
申请日：1982-12-27
申请人： RICOH KK
发明人： SUGANO FUCHIO , KOBAYASHI KAZUO , SAKAMOTO KOJI , KANEKO TOSHIO , YASUDA WATARU
IPC分类号： G03G15/08 , G03G15/09

7. 发明专利

JPH023185B2 失效
公开(公告)号：JPH023185B2
公开(公告)日：1990-01-22
申请号：JP9405182
申请日：1982-06-03
申请人： RICOH KK
发明人： SAKAMOTO KOJI , KANEKO TOSHIO , SUGANO FUCHIO , YASUDA WATARU
IPC分类号： G03G15/08 , G03G15/09

8. 发明专利

JPH0159584B2 失效
公开(公告)号：JPH0159584B2
公开(公告)日：1989-12-18
申请号：JP17990082
申请日：1982-10-15
申请人： RICOH KK
发明人： SUGANO FUCHIO , KANEKO TOSHIO , SAKAMOTO KOJI , YASUDA WATARU
IPC分类号： G03G15/09

9. 发明专利

JPS6299771A DEVELOPING DEVICE 失效
公开(公告)号：JPS6299771A
公开(公告)日：1987-05-09
申请号：JP23959885
申请日：1985-10-28
申请人： RICOH KK
发明人： TAKEDA FUCHIO , MATSUSHIRO HIROYUKI , KOBAYASHI KAZUO , KANEKO TOSHIO
IPC分类号： G03G15/08
摘要： PURPOSE:To obtain a device suitable for binary developing and can obtain a good reproduced picture by holding a specific relation between the resistivity and specific dielectric constant of a dielectric layer. CONSTITUTION:A toner carrier 5 has, from the surface in order, an insulating layer 11, a dielectric layer 12 and a conductive substrate 13. The conductive substrate 13 is supported rotatably by the frame of a developing device, and connected to a power source for applying bias. However, it is insulated from the frame of the developing device. A material in which the relation log10y 1) holds, where y is resistivity and x is specific dielectric constant, is used for the dielectric layer 12. Thus, a toner carrier suitable for binary developing can be obtained.

10. 发明专利

JPS61238072A DEVELOPING DEVICE 失效
公开(公告)号：JPS61238072A
公开(公告)日：1986-10-23
申请号：JP7852585
申请日：1985-04-15
申请人： RICOH KK
发明人： OGATA YOSHIHIRO , SUGANO FUCHIO , YOSHIMARU AKITO , ENDO SHUICHI , KANEKO TOSHIO
IPC分类号： G03G15/06 , G03G15/08
摘要： PURPOSE:To prevent an afterimage from being formed and to obtain high-level image quality stably by supplying a developer from a storage means to a developer conveyor and then removing a returned developer from the surface of the conveyor by a rotating member through a development area. CONSTITUTION:Remaining tone passed through an electrostatic discharging area is conveyed to the arrangement position of a press-contacting roller 5 according to the rotation of a developing sleeve 1 as the developer conveyor and scraped off the surface of the sleeve 1 by the press-contacting roller 5 which slides while moving in the opposite direction of the sleeve 1. This roller 5 has a surface part 5b of urethane foam adhered to its peripheral surface and this roller 5 is pressed properly against the sleeve 1 in surface contact to scrape the remaining toner securely and also grounded to easily scrape the toner. Thus, the remaining toner on the surface of the sleeve 1 is removed easily and securely to control the formation of an afterimage originating from the remaining toner.

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