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    • 1. 发明授权
    • Developing apparatus
    • 开发设备
    • US07072607B2
    • 2006-07-04
    • US10733358
    • 2003-12-12
    • Manami HaraguchiTakeshi YamamotoMakoto Fukatsu
    • Manami HaraguchiTakeshi YamamotoMakoto Fukatsu
    • G03G15/08
    • G03G15/0815
    • A developing apparatus includes a developer carrying member for carrying a developer to develop an electrostatic latent image formed on and image bearing member, the developer carrying member having an elastic property; scraping/supplying member, contacted into the developer carrying member, for supplying the developer to the developer carrying member and for scraping the developer off the developer carrying member, the scraping/supplying member having an elastic property, wherein the developer carrying member has a hardness which is higher than that of the scraping/supplying member, and wherein the developer carrying member and the scraping/supplying member satisfy that in a state in which the scraping/supplying member is out of contact with the developer carrying member, a radius of curvature of the scraping/supplying member is larger than a radius of curvature of the developer carrying member at a position of contact between the scraping/supplying member and the developer carrying member.
    • 显影装置包括用于承载显影剂以显影形成在其上的静电潜像和图像承载部件的显影剂承载部件,显影剂承载部件具有弹性; 刮擦/供给构件,接触到显影剂承载构件中,用于将显影剂供应到显影剂承载构件并将显影剂从显影剂承载构件刮下,刮擦/供给构件具有弹性,其中显影剂承载构件具有硬度 其高于刮削/供给部件,并且其中显影剂承载部件和刮擦/供给部件满足在刮擦/供给部件与显影剂承载部件不接触的状态下,曲率半径 刮削/供给构件的大小大于在刮除/供给构件和显影剂承载构件之间的接触位置处的显影剂承载构件的曲率半径。
    • 2. 发明授权
    • Image forming apparatus
    • 图像形成装置
    • US07912389B2
    • 2011-03-22
    • US12022575
    • 2008-01-30
    • Takeshi YamamotoManami HaraguchiKenta KuboYoshinobu BabaKoh Ishigami
    • Takeshi YamamotoManami HaraguchiKenta KuboYoshinobu BabaKoh Ishigami
    • G03G15/08
    • G03G15/065G03G5/04G03G15/0806G03G15/5037G03G15/5062G03G2215/00037G03G2215/0607
    • An image forming apparatus, wherein the following formulae are satisfied: 0.22 ≤ ( M / S ) L ≤ 0.4 , ⁢ ( Q M ) L = Vc ( Lt 2 ⁢ ɛ 0 ⁢ ɛ t + Ld ɛ 0 ⁢ ɛ d ) × ( M S ) L ( Dt ⁢ ⁢ max - Dt 0.1 ) { λ × ( M S ) L - 0.1 } ⁢ ( Lt 2 ⁢ ɛ 0 ⁢ ɛ t + Ld ɛ 0 ⁢ ɛ d ) × ( M S ) L 500 ≤ αβ ≤ ( Dt ⁢ ⁢ max - Dt 0.1 ) { λ × ( M S ) L - 0.1 } ⁢ ( Lt 2 ⁢ ɛ 0 ⁢ ɛ t + Ld ɛ 0 ⁢ ɛ d ) × ( M S ) L 150 αβ ≥ ( Dt ⁢ ⁢ max - Dt 0.1 ) { λ × ( M S ) L - 0.1 } 150 where (M/S)L: a toner bearing amount in a maximum density image portion of a photosensitive drum, (Q/M)L: an average charge amount of the toner in the maximum density portion, Vc: an absolute value of a potential difference between a DC-component of a developing bias and the maximum density portion, Lt: a toner layer thickness of the maximum density portion, Ld: a drum thickness, εt: a relative permittivity of the toner layer, εd: a relative permittivity of the drum, ε0: a vacuum permittivity, Dtmax: a transmission density in a maximum density image portion on the paper after fixation, Dt0.1: a transmission density in an image on the paper when the toner bearing amount on the paper after fixation is 0.1 mg/cm2, and λ: a transfer efficiency of the toner, α = ( Dt ⁢ ⁢ max - Dt 0.1 ) { λ × ( M S ) L - 0.1 } , ⁢ and ⁢ ⁢ β = 1 / ( Q / M ) L .
    • 图像形成装置,其中满足以下公式:0.22≤(M / S)L≤0.4,(QM)L = Vc(Lt2ε0εt + Ldεεεε)×(MS )L(Dt·最大 - Dt 0.1){λ×(MS)L-0.1}(Lt2ε0εt + Ldε0εd)×(MS)L 500≤α&bgr; ≤(Dt·最大 - Dt 0.1){λ×(M S)L -0.1}(Lt2ε0εt + Ld∈0εd)×(M S)L 150α&bgr; ≥(Dt·最大 - Dt 0.1){λ×(MS)L-0.1} 150其中(M / S)L:感光鼓的最大浓度图像部分中的调色剂承载量(Q / M)L :最大密度部分中的调色剂的平均电荷量,Vc:显影偏压的DC分量与最大浓度部分之间的电位差的绝对值,Lt:最大密度部分的调色剂层厚度, Ld:鼓厚度,t:调色剂层的相对介电常数,e:鼓的相对介电常数; e:真空介电常数Dtmax:最大密度图像部分的透射密度 固定后的纸张,Dt0.1:固定后纸张上的调色剂承载量为0.1mg / cm 2时在纸张上的图像中的透射密度,λ:调色剂的转印效率,α=(Dt + max - Dt 0.1){λ×(MS)L-0.1},和ü&bgr; = 1 /(Q / M)L。
    • 3. 发明申请
    • IMAGE FORMING APPARATUS
    • 图像形成装置
    • US20100209147A1
    • 2010-08-19
    • US12771539
    • 2010-04-30
    • Kenta KuboTakeshi YamamotoManami HaraguchiTomoaki MiyazawaJuun Horie
    • Kenta KuboTakeshi YamamotoManami HaraguchiTomoaki MiyazawaJuun Horie
    • G03G15/09
    • G03G15/0907G03G9/10G03G9/107G03G2215/0602
    • A duty ratio Du (%), denoted by (T2/(T1+T2))×100, is in the range of 60≦Du≦80; a magnetic carrier has a resistivity ρ which decreases in accordance with an increasing electric field strength, and a relative dielectric constant ∈ which increases in accordance with an increasing electric field strength; a product of a time constant ∈0∈ρ(s) of electric charge decay in an electric field strength E2D decided by a second peak voltage V2 and a dark potential VD, and an electric field strength E2D satisfies a relation of 20≦∈0∈ρ E2D (s·V/cm); and a time constant ∈0∈ρ(s) and a relative dielectric constant ∈ in an electric field strength E1L, which is decided by a first peak voltage V1 and a bright potential VL, satisfy the following relations: ∈0∈ρ(s)≦6.0×10−4, and 30≦∈.
    • 由(T2 /(T1 + T2))×100表示​​的占空比Du(%)在60& nlE的范围内; Du≦̸ 80; 磁性载体具有电阻率&rgr; 其随着电场强度的增加而减小,相对介电常数ε随电场强度的增加而增加; 由第二峰值电压V2和暗电位VD决定的电场强度E2D中电荷衰减的时间常数∈0∈&rgr(s)的乘积,电场强度E2D满足关系20≦̸∈ 0∈&rgr; E2D(s·V / cm); 并且由第一峰值电压V1和亮电位VL确定的电场强度E1L中的时间常数∈0∈&rgr(s)和相对介电常数∈满足以下关系:∈0∈&rgr; (s)≦̸ 6.0×10-4和30≦̸∈。