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51. 发明专利

JPH05341647A 失效
公开(公告)号：JPH05341647A
公开(公告)日：1993-12-24
申请号：JP17147292
申请日：1992-06-08
申请人： SHARP KK
发明人： SAITO JUNICHI , NAKANO NOBUHIKO , OUCHI TAKEAKI , HIRAGA YUJI
IPC分类号： G03G15/08
摘要： PURPOSE:To obtain the toner container having the heat insulation characteristic capable of preventing blocking, assuring a flow property and limiting the generation of the abnormal value of fogging by suppressing the temp. rise of the toner in the container in spite of the exposure of the toner container to a high- temp. environment at the time of storage. CONSTITUTION:An org. foamed material 3 is expansion molded as either of the inside shell material or outside shell material of a thin synthetic resin support 4 molded to a bottle shape or the intermediate member of two sheets of the supports 4 having a two-layered structure in the toner container 1 to be used for electrophotogroply. The container 1 is constituted integrally with these supports 4. The org. foamed material 3 is expansion molded as the outside shell material of the thin synthetic resin support 4 molded to a cap shape and the cap 2 is constituted integrally with the supports 4. The container unit is constituted of such container 1 and the cap 2.

52. 发明专利

JPH03179456A ELECTROPHOTOGRAPHIC DEVELOPER 失效
公开(公告)号：JPH03179456A
公开(公告)日：1991-08-05
申请号：JP31916989
申请日：1989-12-08
申请人： SHARP KK
发明人： ISHIDA TOSHINAO , NAKAMURA MASA , OKAMOTO KANJIROU , NAKANO NOBUHIKO , HATANO SHINTARO , OUCHI TAKEAKI
IPC分类号： G03G9/08
摘要： PURPOSE:To prevent scattering of a toner, to enhance electric chargeability of the toner, and to lengthen the life of the developer by using the developer comprising a carrier and the positively chargeable toner and external additives containing additive particles made of an imidazole derivative specified in particle diameter. CONSTITUTION:This developer is a binary developer comprising the carrier and the positively chargeable toner and the external additives containing the external additive particles made of the imidazole derivative having a volume average particle diameter larger than that of the toner, thus permitting scattering of the toner to be reduced by attaching of the additive particles to the toner particles negatively charged or less charged, and chargeability of the toner to be properly stabilized for a long period even at the time of repeated uses for development by using the imidazole derivative, and the carrier to be made also resistant to deterioration, and consequently, the developer to be lengthened in the life.

53. 发明专利

JPH02198456A TONER FOR ELECTROPHOTOGRAPHY 失效
公开(公告)号：JPH02198456A
公开(公告)日：1990-08-06
申请号：JP1805889
申请日：1989-01-27
申请人： SHARP KK
发明人： TASAKA SHIGEAKI , YAMAGAMI TOMOJI , NAKANO NOBUHIKO , NAKAMURA KUMIKO , ISHIDA TOSHINAO
IPC分类号： G03G9/097 , G03G9/08
摘要： PURPOSE:To prevent the increase of consumption of the toner in the initial period of copying and the increase of image fogging by setting the weight ratio of an electrostatic charge stabilizer to the toner particulate matter of the toner for supplying in the initial period larger than the weight ratio of the electrostatic charge stabilizer to the toner particulate matter of the toner for replenishment. CONSTITUTION:The weight ratio of the electrostatic charge stabilizer to the toner particulate matter of the toner for supplying in the initial period of the toner for electrophotography formed by adding the electrostatic charge stabilizers to suppress the decrease of the electrostatic charge quantity of the toner particulate matter of the toner for supplying in the initial period and the toner for replenishment is set larger than the weight ratio of the electrostatic charge stabilizer to the toner particulate matter of the toner for replenishment. The increase of the toner consumption in the initial period of operation and the increase of the image fogging are suppressed in this way and the stable images are always obtd.

54. 发明专利

JPH02876A TONER FOR ELECTROPHOTOGRAPHIC DEVICE 失效
公开(公告)号：JPH02876A
公开(公告)日：1990-01-05
申请号：JP33100888
申请日：1988-12-29
申请人： SHARP KK
发明人： TASAKA SHIGEAKI , NAKANO NOBUHIKO , MAEDA KAZUYA , YAMAGAMI TOMOJI , NAKAMURA KUMIKO
IPC分类号： G03G9/08
摘要： PURPOSE:To stably obtain an image having good image quality by setting the weight ratio of an external additive of the toner for supplying at the initial time to a granular toner material larger than the weight ratio of the external additive of the toner for replenishing to the granular toner material. CONSTITUTION:The weight ratio of the external additive of the toner for supplying at the initial time is set larger than the weight ratio of the external additive of the toner for replenishing to the granular toner material. The extreme increase in the toner concn. in a developing tank is, therefore, suppressed even after many times of copying if the toner for replenishment is supplied to the developing tank of the electrophotographic device according to the consumption of the toner after the toner for supplying at the initial time is previously supplied to the developing tank. The always good image is obtd. in this way.

55. 发明专利

JPH01259371A ELECTROPHOTOGRAPHIC TONER 失效
公开(公告)号：JPH01259371A
公开(公告)日：1989-10-17
申请号：JP8783788
申请日：1988-04-08
申请人： SHARP KK
发明人： TASAKA SHIGEAKI , NAKANO NOBUHIKO , YAMAGAMI TOMOJI , ISHIDA TOSHINAO , NAKAMURA MASA , KITAHATA YASUO
IPC分类号： G03G9/09 , G03G9/097
摘要： PURPOSE:To obtain an electrophotographic toner capable of improving the quality of developed picture images by constituting a charge adjusting agent of nigrosine and a quat. ammonium salt. CONSTITUTION:An amt. of electric charge of a toner is easily and exactly adjusted by adjusting the amt. of nigrosine having high chargeability and a quat. ammonium salt having relatively small chargeability, in a charge adjusting agent. For example, a degree of electric charge of a toner is adjusted approximately in a first stage with nigrosine, then the charge is adjusted precisely in the last stage with the quat. ammonium salt. By this method, a charge of a toner is set at an almost approximate value, and the quality of picture images is improved while inhibiting the decrease of picture image density and fog, etc.

56. 发明专利

JPH01202762A PRODUCTION OF TONER 失效
公开(公告)号：JPH01202762A
公开(公告)日：1989-08-15
申请号：JP2857488
申请日：1988-02-09
申请人： SHARP KK
发明人： NAKANO NOBUHIKO , MAEDA KAZUYA , ISHIDA TOSHINAO , TAKAHASHI YOSHIAKI , NAKAMURA MASA , YAMAGAMI TOMOJI
IPC分类号： G03G9/087 , G03G9/08 , G03G9/097
摘要： PURPOSE:To obtain a picture image having high quality by adding an antitack agent to a mixture contg. a charge controlling agent and a colorant dispersed in a resin as a main component obtd. by kneading the resin with the colorant and the charge controlling agent, kneading the mixture further to disperse thus the antitack agent in said kneaded product. CONSTITUTION:A final kneaded product contg. an antitack agent dispersed in a mixture of a resin, colorant and a charge controlling agent, which is prepd. by kneading the resin as a main component with the charge controlling agent, and the colorant, is obtd. by an above-described process. Each component is dispersed uniformly by dispersing the charge controlling agent and the colorant uniformly in the resin in a first stage, then dispersing the antitack agent further in the kneaded mixture in a second stage. A picture image of high quality is obtd. stably as the degree of dispersion of each component in the toner is improved.

57. 发明专利

JP2003195622A DEVELOPING DEVICE 审中-公开
公开(公告)号：JP2003195622A
公开(公告)日：2003-07-09
申请号：JP2001392292
申请日：2001-12-25
申请人： SHARP KK
发明人： NAKANO NOBUHIKO , WAKATA SHIGEYUKI , HASEGAWA MITSUHIRO , KAWABATA ITARU , YOSHIOKA TORU , KITAMURA KEIZO
IPC分类号： G03G15/00 , G03G15/08
摘要： PROBLEM TO BE SOLVED: To cancel the detection level errors of toner concentration and to appropriately and rapidly replenish the toner without increasing the cost and without affecting the life of a photoreceptor drum, etc. SOLUTION: A data table D1 showing a change in humidity in January to December and a data table D2 wherein each correction amount coping with the humidity change is stored are previously formed and stored, and also, an initialized threshold and an initialized date are stored. The correction amount when the developing device 12 is in operation is outputted from respective data tables D1 and D2, the initialized threshold and the correction amount are added together, then, the threshold is corrected, and toner is replenished from a hopper 22 to a developer container 23 so that the detection output of the toner concentration sensor 27 may become the corrected threshold, and then, the normal toner concentration is maintained in the developer stored in the developer container 23. COPYRIGHT: (C)2003,JPO

58. 发明专利

JP2003122088A IMAGE FORMING DEVICE 审中-公开
公开(公告)号：JP2003122088A
公开(公告)日：2003-04-25
申请号：JP2001320137
申请日：2001-10-18
申请人： SHARP KK
发明人： WAKATA SHIGEYUKI , YOSHIOKA TORU , NAKANO NOBUHIKO , HASEGAWA MITSUHIRO , KITAMURA KEIZO
IPC分类号： G03G15/00 , G03G15/01 , H04N1/29
摘要： PROBLEM TO BE SOLVED: To prevent the occurrence of a defective image such as trailing end missing, etc., while coping with a wide situational change without making a device large in size and without increasing the cost. SOLUTION: A measurement patch image is formed by a black image forming part 10BK, the density of the patch image is read by an image density reading device 30, and the defective image such as the trailing end missing, etc., is detected based on the read image density, and the correction amount of the output in each of cyan, magenta and yellow image forming parts 10C, 10M and 10Y is decided by a control part 20 so as to correct the defective image. By forming a synthesized black image (black image formed by overlapping cyan, magenta and yellow images each other) based on the correction amount of the output in respective cyan, magenta and yellow image forming parts 10C, 10M and 10Y, the defective image caused by the black image forming part 10BK is corrected.

59. 发明专利

JPH11338309A IMAGE FORMING DEVICE 失效
公开(公告)号：JPH11338309A
公开(公告)日：1999-12-10
申请号：JP14679498
申请日：1998-05-28
申请人： SHARP KK
发明人： INOUE ATSUSHI , TAKATANI TOSHIHIKO , YAMANAKA TAKAYUKI , TATSUMI HIROSHI , SAKAI KOJI , NAKANO NOBUHIKO
IPC分类号： G03G21/00 , F16F15/16 , G03G15/00 , G03G15/08 , G03G15/09
摘要： PROBLEM TO BE SOLVED: To surely prevent jitter, etc., caused by torque fluctuation by coaxially providing a granular fluidized body enclosed damper in which granular fluidized body is enclosed with the turning shaft of at least either of an electrostatic latent image holding body and a developer carrier. SOLUTION: A developing roller 3 rotates in a direction reverse to that of a photoreceptor drum 1 in terms of the rotating direction of the roller 3, that is, the roller 3 rotates so that the moving direction of the surface of the roller 3 at a part where the roller 3 is opposed to the drum 1 is the same direction as the moving direction of the surface of the drum 1. The circumferential speed of the roller 3 is 1.5 times as high as that of the drum 1. The granular fluidized body enclosed damper 12 is coaxially fixed to the rotating shaft 11 of the drum 1. The damper 12 is constituted of an outer shell case 13 fixed to the shaft 11 of the drum 1, and an inertial body 14 which is provided inside the case 13 and coaxially with the case 13, and which has a gap with the inside peripheral surface of the case 13. The gap between the peripheral surfaces of the case 13 and the body 14 is filled with silica gel 15 being the granular fluidized body.

60. 发明专利

JPH11263036A DEVELOPER CHARGER AND IMAGE FORMATION APPARATUS 失效
公开(公告)号：JPH11263036A
公开(公告)日：1999-09-28
申请号：JP6898398
申请日：1998-03-18
申请人： SHARP KK
发明人： NARUKAWA SHIRO , NAKANO NOBUHIKO , UEDA ATSUSHI , IZUMI HIDESHI , TSUKAMOTO KIMIHIDE
IPC分类号： B41J2/385 , G03G15/05 , G03G15/08
摘要： PROBLEM TO BE SOLVED: To provide a developer charger which can supply toner stably and a compact image formation apparatus which can form images in a simple process. SOLUTION: A toner container 39, a feed roller 33 and a holding roller 31 are arranged in a horizontal direction, thereby securing a fly course wide for a toner T. A sufficient quantity of the toner is accordingly supplied. The feed roller 33 is made a prism, arranged not to be in touch with the holding roller 31 and a rotational direction Ω3 of the feed roller 33 is made opposite to a rotational direction Ω2 of the holding roller 31, so that the sufficient quantity of the toner can be supplied to the holding roller 31. Moreover, the feed roller 33 is pressed by a flexible pressing member 34, thereby being improved in capability for supplementing the toner to an area where the toner is consumed by printing, i.e., follow-up capability.

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