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51. 发明专利

JPH0259467B2 失效
公开(公告)号：JPH0259467B2
公开(公告)日：1990-12-12
申请号：JP18365981
申请日：1981-11-18
申请人： RICOH KK
发明人： SUGANO FUCHIO , SAKAMOTO KOJI , KANEKO TOSHIO
IPC分类号： G03G15/09

52. 发明专利

JPS62192771A PICTURE FORMING DEVICE 失效
公开(公告)号：JPS62192771A
公开(公告)日：1987-08-24
申请号：JP3554386
申请日：1986-02-20
申请人： RICOH KK
发明人： ISHIKAWA TOYOJI , KANEKO TOSHIO , ENDO SHUICHI
IPC分类号： G03G15/08 , G03G15/00
摘要： PURPOSE:To bring a developing roller in contact with a photosensitive body with appropriate pressure by making the developing roller to press and contact the photosensitive body with prescribed pressure by means of a developing unit pressing means and a developing unit float preventing means. CONSTITUTION:A main body case 21 of a developing unit 17 is loaded on three rollers 28 which are provided at the base wall part of in image forming unit case 18 freely rotatably, and is pressed with prescribed energizing power by a coil spring 31 from the rear edge side of the roller 28 in the direction of a holder unit 16 side. Further, two coil springs 32 are fitted respectively so as to project toward the developing unit 17, and has the function to push the developing unit 17 into the lower side with a prescribed pressure. Thus, by the coil spring 31 and 32, a developing roller 22 can be pressed to a photosensitive body 4 with an appropriate contact pressure, and a good contact developing action can be always obtained.

53. 发明专利

JPS5995557A DEVICE FOR DEVELOPING ELECTROSTATIC LATENT IMAGE 失效
公开(公告)号：JPS5995557A
公开(公告)日：1984-06-01
申请号：JP20640982
申请日：1982-11-25
申请人： RICOH KK
发明人： FUJITA SHIYUNSUKE , KANEKO TOSHIO , TOMITA SATORU , SHIMURA AKIRA
IPC分类号： G03G15/08
摘要： PURPOSE:To detect the presence of a developer without misaction by installing a moving body for preventing attachment and deposition of the developer to the inside wall of a hopper above a sensor. CONSTITUTION:The moving body 7 for preventing the developer from attachment and deposition to the inside wall of a hopper 1 above a sensor 2 is installed to continuously break the deposit of the developer ready to be formed on the inside wall of the hopper 1 above the sensor 2. As said moving body 7, for example, a disc is used and said body is rotated. A reciprocating rotation is suitable for this rotation movement to prevent one-sided filling of the developer, but when a developing device tends to be filled one-sidedly with the developer, it is effective to rotate the disc in one direction to suppress this unbalance.

54. 发明专利

JPS5988761A DEVELOPING DEVICE 失效
公开(公告)号：JPS5988761A
公开(公告)日：1984-05-22
申请号：JP19886182
申请日：1982-11-15
申请人： RICOH KK
发明人： YASUDA WATARU , SAKAMOTO KOUJI , KANEKO TOSHIO , SUGANO FUCHIO
IPC分类号： G03G15/09
摘要： PURPOSE:To prevent occurrence of a toner film on the peripheral surface of a toner carrying body and stabilize the picture quality, by installing a mechanism which intermittently contacts a tip of a press member pressing the surface of the toner carrying body with the surface of the toner carrying body. CONSTITUTION:When a developing process is repeated and a prescribed number of copies are made, a driving control means 8d of a blade 8 drives and displaces a connected cam 8b. When the cam 8b is displaced, the blade 8 presses the surface of a toner carrying body 4 and controls the thickness of toner to a prescribed value and at the sme time, is pulled by the elastic force of a spring 8c from the thickness controlling position where the blade 8 is charged with electricity by friction. At this position, the tip section 8f of the blade 8 contacts with the surface of an image carrying body 4 and compulsorily scrapes down toner 6 firmly adhering to the surface of the carrying body 4. When the cleaning operation time of a set operation pattern has passed, the blade 8 returns to the position of the developing period. In this way, occurrence of a toner film is prevented.

55. 发明专利

JPS58208769A DEVELOPING DEVICE 失效
公开(公告)号：JPS58208769A
公开(公告)日：1983-12-05
申请号：JP9144882
申请日：1982-05-31
申请人： RICOH KK
发明人： KANEKO TOSHIO , SAKAMOTO KOUJI , SUGANO FUCHIO
IPC分类号： G03G15/08 , G03G15/09
摘要： PURPOSE:To form a developer carrier forming uniform and a fine picture by making a conductive supporting element hold many minute conductive particles covered with specific insulating coat (thickness and inherent volume resistivity) at mutually insulated state. CONSTITUTION:Conductive particles (e.g. aluminium particles having about 10- 500mu grain size) are coated with resin having 10 OMEGA.cm or more inherent volume resistivity at 0.5mu-5mm. thickness. Namely, a dielectric layer 2a is formed on a conductive supporting element 1 consisting of a nonmagnetic substance, dielectric adhesives is applied to the dielectric layer 2a, and before the adhesives layer 5 is dried, said resin-coated conductive particles 6a are sprayed on the layer 5. Subsequently, a heat-contracting tube 20 is applied to the particles 6a to contract and press the particles 6a, arrange the array state and from an almost uniform particle layer 6. After applying the 2nd adhesives layer 9 to the particle layer 6, the surface is ground and a part of the conductive particles is exposed to form the developer carrier.

56. 发明专利

JPS58154863A DRY DEVELOPING DEVICE 失效
公开(公告)号：JPS58154863A
公开(公告)日：1983-09-14
申请号：JP3660082
申请日：1982-03-10
申请人： RICOH KK
发明人： KANEKO TOSHIO , SAKAMOTO KOUJI , SUGANO FUCHIO , YASUDA WATARU , KOBAYASHI HIROSHI , MACHIDA HARUHIKO
IPC分类号： G03G15/08 , G03G15/09
摘要： PURPOSE:To prevent the formation of stripes due to the deposition of toner and a abrasion flaw and to maintain a picture of high quality for a long period, by using superhigh polymer polyethylene resin having >1,000,000mol.wt. for the contacting part of a layer thickness specifying means with a developer. CONSTITUTION:The layer thickness specifying means 5 consists of a supporting plate 9 of a magnetic material fixed to a fixing member 8 and a specifying plate 10 adhered thereto, and the specifying plate 10 is made of superhigh polymer polyethylene resin with >1,000,000mol.wt. The specifying plate 10 is pressed hardly against a sleeve 4 to control a toner layer to an extremely small thickness. Specially, when high resistance toner is used, the pressing force should be high and the formation of stripes due to the deposition of toner and a flaw in the plate 10 deteriorates the picture quality conventionally, but said superhigh polymer resin has superior wear resistance and releasing properties, so the formation of stripes is prevent to maintain excellent picture quality for a long period.

57. 发明专利

JPS5897071A DEVELOPING DEVICE 失效
公开(公告)号：JPS5897071A
公开(公告)日：1983-06-09
申请号：JP19559281
申请日：1981-12-07
申请人： RICOH KK
发明人： SAKAMOTO KOUJI , KANEKO TOSHIO , KANNO FUCHIO
IPC分类号： G03G15/09
摘要： PURPOSE:To reproduce a contact print and a line image adequately by forming a dielectric layer over the surface of a developing electrode, i.e. sleeve and providing an insulated electrode which is divided finely thereupon. CONSTITUTION:On the surface of a dielectric supporting body 12 made of stainless steel which houses a magnet 11 having numbers of, e.g. eight alternate poles N and S, an epoxy resin layer 13 with an about 300mum thickness is formed by powder coating as a dielectric layer. To the surface of the dielectric layer, spheroidized copper 14 is adhered with an epoxy adhesive. The spheroidized copper 14 forms a float electrode after the adherence of the spheroidized copper, the outer circumference surface of the dielectric layer 13 is polished to form the exposed surface of the spheroidized copper linearly in a plane shape. Respective electrodes of the spheroidized copper are insulated electrically from one another and a magnetic blade 18 for discharging is arranged in contact with the external circumferential surface of the dielectric layer 13.

58. 发明专利

JPS5880675A DEVELOPING DEVICE 失效
公开(公告)号：JPS5880675A
公开(公告)日：1983-05-14
申请号：JP17896881
申请日：1981-11-10
申请人： RICOH KK
发明人： SAKAMOTO KOUJI , KANEKO TOSHIO , SUGANO FUCHIO
IPC分类号： G03G15/08 , G03G15/09
摘要： PURPOSE:To obtain satisfactory reproducibility and gradation to both flat part and line part, by providing a dielectric layer on a conductive supporting body of a sleeve, and also embedding a finely divided float electrode on its surface like an island o that its surface is exposed. CONSTITUTION:A developing sleeve 12 is provided in the vicinity of a photosensitive drum 11, and on the outside circumference of a conductive supporting body 13 of this developing sleeve 12, a dielectric layer 14 is laminated, and on this dielectric layer 14, a conductive brush 15 is provided on the whole circumferential surface. This conductive brush 15 consists of conductive fur bodies which are in an electrically insulating state to each other. In the developing sleeve 12, a magnet which rotates in the opposite direction is provided.

59. 发明专利

JPS5796373A MAGNETIC BRUSH DEVELOPING DEVICE 失效
公开(公告)号：JPS5796373A
公开(公告)日：1982-06-15
申请号：JP17362380
申请日：1980-12-09
申请人： RICOH KK
发明人： KANEKO TOSHIO , SUZUKI HIROHARU , KOYAMA HAJIME , ENOKI SHIGEKAZU
IPC分类号： G03G15/08 , G03G15/09
摘要： PURPOSE:To perform a satisfactory development by making plural coloring particles adhere onto an electrostatic latent image in a constant ratio, and also to prevent abrasion of a scraping member, by using a developing sleeve obtained by performing a coarse surface treatment of 1/5-1/2 of particle size of a developer to its surface. CONSTITUTION:A control member 13 for controlling the quantity of a developer carried by a sleeve 5, and a scraping member 14 for removing it from the surface of the sleeve 5 are placed near the outlet of a developer vessel 4, and also on the surface of the sleeve 5, a lot of groove 15 are formed in its axial direction. This groove 15 is formed within the range of 1/5-1/2 of the diameter of a coloring particle so as to have such depth as one coloring particle being a developer does not enter into this groove entirely, therefore, abrasion of the scraping member 14 is reduced, also developers of 2 kinds or more can be mixed sufficiently, and the development is performed satisfactorily.

60. 发明专利

JPS5794755A METHOD FOR ELECTRONIC PHOTOGRAPHY 失效
公开(公告)号：JPS5794755A
公开(公告)日：1982-06-12
申请号：JP17132980
申请日：1980-12-04
申请人： RICOH KK
发明人： SUZUKI HIROHARU , KANEKO TOSHIO , KOYAMA HAJIME , ENOKI SHIGEKAZU
IPC分类号： G03G9/08 , G03G15/09
摘要： PURPOSE:To make developing in a low resistance state and to make transferring in a high resistance state by depositing low resistance fine particles around a high resistance toner and using it as a developer. CONSTITUTION:A developer is made by melt-sticking an electrostatic induction accelerator (b) having OMEGAcm resistance and having a 1/5-1/2 average diameter that of the high resistance toner around high resistance toner particles (a) having >=10 OMEGAcm resistance. The high resistance toner consists of a magnetic toner or nonmagnetic toner and the electrostatic accelerator is made up of a magnetic body or carbon and resin, and made a magnetic susceptible developer as a whole. Magnetic brush developing is made at a 0.1-0.5mm. developing gap 4 using this developer. When the saturation potential of the photosensitive body 3 is 500-1,000V, the resistance of developer becomes rcm and good transferring can be effected without causing leak due to the toner.

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