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    • 2. 发明授权
    • Developing apparatus including intermittent developer agitating feature, and image forming apparatus using same
    • 显影装置,包括间歇显影剂搅拌特征,以及使用其的图像形成装置
    • US06370348B1
    • 2002-04-09
    • US09570060
    • 2000-05-12
    • Keiji OkanoKoichi SuwaMasahiro YoshidaHideki Matsumoto
    • Keiji OkanoKoichi SuwaMasahiro YoshidaHideki Matsumoto
    • G03G1508
    • G03G15/0822G03G2215/0602
    • A developing apparatus includes a developer containing portion containing a developer having a weight average particle diameter of not more than 7 &mgr;m, a developer bearing member for bearing a developer, and an agitating member that agitates the developer contained in the developer containing portion. The agitating member is intermittently driven with respect to rotation of a developing sleeve. The agitating member is driven to rotate for one page every time the image forming apparatus performs a predetermined number of printing operations. A rod member having a crank-like shape may be used as the agitating member and both of the end portions serve as the center of rotation. By controlling the drive of the agitating member, it is possible to effectively adjust the supply of toner to the developing sleeve and prevent the density lowering phenomena caused due to inflow of a large amount of the new toner presented at the rear of the developing container. The agitating member may be positioned closest to the developing sleeve and may be arranged below the toner container. Accordingly, to these arrangements, the image density after printing a low print pattern can be prevented from being lessened to obtain a uniform image density even though a one-component magnetic developer having the weight average particle sized diameter of not more than 7 &mgr;m is used.
    • 显影装置包括含有重均粒径不大于7μm的显影剂的显影剂容纳部分,用于承载显影剂的显影剂承载部件和搅拌包含在显影剂容纳部分中的显影剂的搅拌部件。 搅拌构件相对于显影套筒的旋转间歇地驱动。 每当图像形成装置执行预定数量的打印操作时,搅拌构件被驱动旋转一页。 可以使用具有曲柄形状的杆构件作为搅拌构件,并且两个端部用作旋转中心。 通过控制搅拌构件的驱动,可以有效地调节向显影套筒的调色剂供应,并且防止由于大量新鲜调色剂流入显影容器的后部而引起的浓度降低现象。 搅拌构件可以定位成最靠近显影套筒并且可以布置在调色剂容器的下方。 因此,对于这些布置,即使使用重均粒径不大于7μm的单组分磁性显影剂,也可以防止印刷低印刷图案之后的图像浓度,以获得均匀的图像浓度 。
    • 3. 发明授权
    • Image forming apparatus with an amount of use control feature and cartridge removably mounted on the apparatus
    • 图像形成装置,其具有可拆卸地安装在装置上的使用量控制特征和盒
    • US06229970B1
    • 2001-05-08
    • US08736088
    • 1996-10-24
    • Tadashi OnimuraKoichi SuwaKazumi Yamauchi
    • Tadashi OnimuraKoichi SuwaKazumi Yamauchi
    • G03G1502
    • G03G21/1889G03G2221/1823
    • An image forming apparatus includes a photosensitive member, a charging device for charging the photosensitive member, an exposing device for exposing a light including image information to the photosensitive member, and a developing device for supplying a toner to an electrostatic latent image formed on said photosensitive member. The developing means is held by a cartridge removably mountable on a main body of the image forming apparatus. The cartridge includes a memory for memorizing an amount of use of the cartridge, wherein a charging amount of the toner caused by friction in the cartridge when the amount of use of the cartridge is in an initial state is smaller than that when the amount of use of said cartridge is not in an initial state. A judging device compares the amount of use of the cartridge with a predetermined value showing a condition that the amount of use of the cartridge is in the initial state. A control device controls operating parameters relating to at least one of the charging device, the exposing device, and the developing device, in accordance with a compared result of the judging device, so as to prevent thinning of an image line width until the amount of use of the cartridge reaches the predetermined value. The control device changes the operating parameters until the amount of use of the cartridge reaches the predetermined value, and sets the operating parameters to be constant after the amount of use of the cartridge reaches the predetermined value.
    • 图像形成装置包括感光构件,用于对感光构件充电的充电装置,用于将包括图像信息的光曝光到感光构件的曝光装置,以及用于向形成在所述感光体上的静电潜像供应调色剂的显影装置 会员。 显影装置由可移除地安装在图像形成装置的主体上的盒保持。 盒式存储器包括用于存储盒的使用量的存储器,其中当盒的使用量处于初始状态时由盒中的摩擦引起的调色剂的充电量小于使用量时的调色剂的充电量 的墨盒不处于初始状态。 判断装置将盒的使用量与表示盒的使用量处于初始状态的条件的预定值进行比较。 控制装置根据判断装置的比较结果来控制与充电装置,曝光装置和显影装置中的至少一个相关的操作参数,以便防止图像线宽度的变薄直到 使用墨盒达到预定值。 控制装置改变操作参数,直到墨盒的使用量达到预定值,并且在墨盒的使用量达到预定值之后将操作参数设定为恒定。
    • 7. 发明授权
    • Image forming apparatus and process cartridge
    • 成像设备和处理盒
    • US06175703B1
    • 2001-01-16
    • US09425734
    • 1999-10-22
    • Yusuke NakazonoJunichi KatoKoichi SuwaSatoru InamiMasahiro YoshidaAtsutoshi AndoSatoshi SunaharaSeiichi Shinohara
    • Yusuke NakazonoJunichi KatoKoichi SuwaSatoru InamiMasahiro YoshidaAtsutoshi AndoSatoshi SunaharaSeiichi Shinohara
    • G03G2116
    • G03G9/0819G03G9/09708G03G9/09716G03G9/09725G03G9/09733G03G13/09G03G13/22G03G2215/021G03G2221/183
    • An image forming apparatus having at least: an image carrying member for carrying an electrostatic latent image, the image carrying member having a photosensitive layer on a conductive substrate; a developer for developing the electrostatic latent image carrying member on the image carrying member; a developer carrying member for carrying the developer and conveying it to a development area; a control member making contact with the developer carrying member for controlling the coating amount of the developer; and a cleaning member for cleaning the surface of the photosensitive layer of the image carrying member by making contact with the surface of the image carrying member with a contact pressure of 0.15N (15 gf) to 0.89N (90 gf). The photosensitive layer contains at least one kind of polycarbonate resin (I) having a viscosity average molecular weight of 1.5×104 or less and at least one kind of polycarbonate resin (II) having a viscosity average molecular weight of more than 1.5×104, the polycarbonate resin (I) is contained in 30% by mass to 95% by mass based on the total content of the resins (I) and (II). The developer has a toner containing toner particles and external additives, and the toner contains (a) 0.1% by mass to 5.0% by mass of a first fine powder with a number average particle size of 0.005 &mgr;m to 3.00 &mgr;m, and (b) 0.02% by mass to 2.00% by mass of an inorganic second fine powder containing 25% by mass to 90% by mass of a lubricant, as external additives.
    • 一种图像形成装置,至少具有:用于承载静电潜像的图像承载部件,所述图像承载部件在导电基板上具有感光层; 用于在图像承载构件上显影静电潜像承载构件的显影剂; 用于承载显影剂并将其传送到显影区域的显影剂承载构件; 控制构件与显影剂承载构件接触以控制显影剂的涂布量; 以及清洁部件,通过以0.15N(15gf)至0.89N(90gf)的接触压力与图像承载部件的表面接触来清洁图像承载部件的感光层的表面。 感光层含有至少一种粘均分子量为1.5×10 4以下的聚碳酸酯树脂(I)和至少一种粘均分子量大于1.5×10 4的聚碳酸酯树脂(II),聚碳酸酯 相对于树脂(I)和(II)的总含量,树脂(I)的含量为30质量%〜95质量%。 显影剂具有含有调色剂颗粒和外部添加剂的调色剂,并且调色剂含有(a)数均粒径为0.005μm至3.00μm的第一细粉末的0.1质量%至5.0质量%,和(b) 作为外部添加剂,含有25质量%〜90质量%的润滑剂的无机第二细粉的0.02质量%〜2.00质量%。
    • 9. 发明授权
    • Image forming apparatus having a mechanism for preventing stripping off
of a lubricant from a cleaning blade
    • 图像形成装置具有用于防止从清洁刮板剥离润滑剂的机构
    • US5995785A
    • 1999-11-30
    • US953977
    • 1997-10-20
    • Junichi KatoTadashi OnimuraKoichi SuwaSatoru InamiJun SuzukiAtsutoshi Ando
    • Junichi KatoTadashi OnimuraKoichi SuwaSatoru InamiJun SuzukiAtsutoshi Ando
    • G03G21/10G03G21/00G03G21/06
    • G03G21/06G03G21/0005G03G2215/021G03G2215/025
    • An image forming apparatus includes, an image bearing member, a charger which may be a main charger and auxiliary charger for charging the image bearing member, a developing unit for forming a toner image by developing an electrostatic latent image formed on the image bearing member using a toner having the same polarity as that of the charger, a transfer electrode, having a width different from that of the charger and contacting a transfer material, for applying a bias voltage having a polarity opposite to that of the charger to the transfer material, the cleaning blade contacting the image bearing member in a counter direction relative to a moving direction of the image bearing member in order to scrape and remove toner particles remaining on the image bearing member after the image transfer due to the potential of the image bearing member, and a member for reducing a charging potential difference between the charger and the transfer electrode generated on the image bearing member. A lubricant may be applied between the image bearing member and the cleaning blade member. By making the width of the charger and the width of the transfer electrode substantially the same, the charging potential difference between the charger and the transfer electrode generated on the image bearing member is reduced.
    • 图像形成装置包括:图像承载部件,可以是主充电器的充电器和用于对图像承载部件充电的辅助充电器;显影单元,用于通过使形成在图像承载部件上的静电潜像显影来形成调色剂图像,该显影单元使用 具有与充电器相同极性的调色剂,具有与充电器的宽度不同的宽度并与转印材料接触的转印电极,用于向转印材料施加极性与充电器极性相反的偏置电压, 所述清洁刮板相对于所述图像承载部件的移动方向在相对方向上接触所述图像承载部件,以便在由于所述图像承载部件的电位而在图像转印之后刮擦和去除残留在所述图像承载部件上的调色剂颗粒, 以及用于减小在图像承载部件上产生的充电器和转印电极之间的充电电位差的部件。 可以在图像承载部件和清洁刮板部件之间施加润滑剂。 通过使充电器的宽度和转印电极的宽度基本相同,在图像承载部件上产生的充电器和转印电极之间的充电电位差减小。