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公开(公告)号：EP3379339B1
公开(公告)日：2020-02-12
申请号：EP18166572.0
申请日：2013-12-13
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公开(公告)号：EP2933685B1
公开(公告)日：2019-05-08
申请号：EP13862540.5
申请日：2013-12-13
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公开(公告)号：EP3477399A1
公开(公告)日：2019-05-01
申请号：EP18201342.5
申请日：2018-10-18
发明人： MITSUI, Yoshihiro , OKA, Takuya , IKAMI, Yasukazu
摘要： An image forming apparatus (100) in which when toner remaining on a development roller (6) in an area from a developer nip (101) to a regulating blade (8) disposed upstream of a rotation direction of the development roller during a stoppage of the image forming apparatus passes through the developer nip (101), a bias is applied so that the toner is drawn to the development roller, and a relative speed difference between the photosensitive drum (1) and the development roller is created so as to be larger than the that during an image forming operation.
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公开(公告)号：EP3106924B1
公开(公告)日：2018-02-07
申请号：EP16174340.6
申请日：2016-06-14
IPC分类号： G03G15/08
CPC分类号： G03G15/553 , G03G15/0844 , G03G15/0856
摘要： An image forming apparatus has a photosensitive drum configured to bear a developer image, a developing apparatus having a developing roller that bears developer and a developing blade that regulates the amount of the developer on the developing roller, and a detection portion that detects information on the amount of the developer stored in the developing apparatus. The image forming apparatus performs a discharging operation for discharging a coating agent, applied to a developing roller in an unused state, from the developing apparatus to the photosensitive drum, while varying an operational condition for the discharging operation varied based on the information.
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公开(公告)号：EP2933685A1
公开(公告)日：2015-10-21
申请号：EP13862540.5
申请日：2013-12-13
IPC分类号： G03G15/08
CPC分类号： G03G21/1803 , G03G15/0806 , G03G15/0808 , G03G21/1825 , G03G21/185 , G03G21/1857 , G03G2221/1657
摘要： A process cartridge comprising: (i) a photosensitive drum; (ii) a rotatable developing roller for developing an electrostatic latent image formed on the photosensitive drum; (iii) a developer supplying roller, provided in contact with the developing roller, for supplying a developer to the developing roller; (iv) a driving force receiving portion for receiving a driving force, wherein the driving force receiving portion is provided at a shaft end portion of the developer supplying roller and is movable in a direction crossing a shaft of the developer supplying roller; (v) a first driving force transmitting portion for transmitting the driving force, received by the driving force receiving portion, to the developing roller, wherein the first driving force transmitting portion is provided on the developer supplying roller; and (vi) a second driving force transmitting portion, provided on the developing roller, for transmitting the driving force by engaging with the driving force transmitting portion. A rotational direction of the developing roller is an opposite direction to a rotational direction of the developer supplying roller, and a surface speed of the developer supplying roller is larger than a surface speed of the developing roller.
摘要翻译： 一种处理盒，包括：（i）感光鼓; （ii）用于显影形成在感光鼓上的静电潜像的可旋转显影辊; （iii）显影剂供应辊，与显影辊接触设置，用于向显影辊供应显影剂; （iv）用于接收驱动力的驱动力接收部分，其中，所述驱动力接收部分设置在所述显影剂供应辊的轴端部分处，并且可在与所述显影剂供应辊的轴交叉的方向上移动; （v）第一驱动力传递部分，用于将由驱动力接收部分接收的驱动力传递给显影辊，其中第一驱动力传递部分设置在显影剂供给辊上; 和（vi）第二驱动力传递部分，设置在显影辊上，用于通过与驱动力传递部分接合而传递驱动力。 显影辊的旋转方向是与显影剂供应辊的旋转方向相反的方向，并且显影剂供应辊的表面速度大于显影辊的表面速度。
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公开(公告)号：EP3660589A1
公开(公告)日：2020-06-03
申请号：EP19208402.8
申请日：2019-11-11
IPC分类号： G03G15/02
摘要： A charging member that contacts an image bearing member and charges the image bearing member has an electrically conductive support and an elastic layer in contact with the image bearing member. The elastic layer includes a semiconductive rubber composition including a matrix and domains having electric conductivity. The semiconductive rubber composition has a sea-island structure in which the domains form an island phase and the matrix forms a sea phase. The matrix has a higher volume resistivity than the domains. The developer includes a toner, and the toner has a Martens hardness of at least 200 MPa and not more than 1100 MPa when measured under a maximum load of 2.0 × 10 -4 N.
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公开(公告)号：EP3499314A1
公开(公告)日：2019-06-19
申请号：EP18212180.6
申请日：2018-12-13
发明人： IKAMI, Yasukazu , MITSUI, Yoshihiro , OKA, Takuya
摘要： A cartridge includes a cleaning member (8) configured to retain specific particles (M) having a smaller equivalent sphere diameter than toner particles at a contact region. The specific particles contain an organosilicon polymer having a partial structure represented by R-SiO 3/2 , wherein R represents an alkyl group having 1 to 6 carbon atoms. The atomic concentration dSi of silicon in the specific particles satisfies 1.0 atomic% ≤ dSi ≤ 29.0 atomic% when the total atomic concentration of silicon, oxygen, and carbon in the specific particles is measured to be 100.0 atomic% by electron spectroscopy for chemical analysis (ESCA). Also, the specific particles satisfy L2/L3 ≤ 3/4 or L2/L3 ≥ 4/3 when assuming that the specific particles have three lengths L1, L2, and L3 in three axis directions in a three-dimensional coordinate system, wherein L1 is the longest one of the three lengths, in an average value of a unit volume.
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公开(公告)号：EP3379339A1
公开(公告)日：2018-09-26
申请号：EP18166572.0
申请日：2013-12-13
摘要： A process cartridge detachably mountable to a main assembly of an image forming apparatus, said process cartridge comprising: a photosensitive drum; a rotatable developing roller configured to develop an electrostatic latent image formed on said photosensitive drum; a rotatable developer supplying roller provided in contact with said developing roller and configured to supply a developer to said developing roller; a developer accommodating chamber configured to accommodate the developer; a developing chamber in which said developer supplying roller is provided; a rotatable feeding member provided in said developer accommodating chamber and configured to feed the developer from said developer accommodating chamber into said developing chamber by moving the developer upwardly against a gravity; a driving force receiving portion provided on said developer supplying roller and configured to receive from an outside of said process cartridge a driving force for rotating said developer supplying roller, said developing roller and said feeding member; a first driving force transmitting portion provided on said developer supplying roller and configured to transmit the driving force received by said driving force receiving portion to said developing roller; and a second driving force transmitting portion provided on said developing roller in engagement with said first driving force transmitting portion to transmit the driving force from said first driving force transmitting portion to said developing roller, wherein said developer supplying roller and said developing roller are rotatable such that surfaces of said developer supplying roller and said developing roller move from a contact portion therebetween toward a bottom of said developing chamber, and wherein a peripheral speed of the surface of said developer supplying roller is higher than that of said developing roller.
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公开(公告)号：EP4075203A1
公开(公告)日：2022-10-19
申请号：EP22171733.3
申请日：2013-12-13
摘要： A developing unit is detachably mountable to a main assembly of an image forming apparatus, the developing unit comprising a rotatable developing roller, a rotatable developer supplying roller provided in contact with the developing roller and configured to supply a developer to the developing roller; a developer accommodating chamber configured to accommodate the developer; a developing chamber in which the developer supplying roller is provided; a rotatable feeding member provided in the developer accommodating chamber and configured to feed the developer from the developer accommodating chamber into the developing chamber by moving the developer upwardly against a gravity; and a driving force receiving portion configured to receive a driving force for rotating the developer supplying roller, the developing roller and the feeding member. The developing unit further comprises a first driving force transmitting portion provided on the developer supplying roller and configured to transmit the driving force received by the driving force receiving portion to the developing roller; and a second driving force transmitting portion provided on the developing roller and configured to transmit the driving force from the first driving force transmitting portion to the developing roller, wherein the driving force receiving portion is provided on the developer supplying roller, wherein the developer supplying roller and the developing roller are rotatable such that surfaces of the developer supplying roller and the developing roller move at a contact portion between the developer supplying roller and the developing roller n the same direction and toward a bottom of the developing chamber, and wherein a peripheral speed of the surface of the developer supplying roller is higher than that of the developing roller.
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公开(公告)号：EP3657261A1
公开(公告)日：2020-05-27
申请号：EP19208116.4
申请日：2019-11-08
IPC分类号： G03G15/02
摘要： A charging member (2) that charges an image bearing member (1) has an electrically conductive support and an elastic layer in contact with the image bearing member. The elastic layer includes a semiconductive rubber composition having a matrix-domain structure including a matrix (211) and domains (212) having electric conductivity. The matrix has a higher volume resistivity than the domain. The developer includes a toner having toner particles (T). The toner particles each have a surface layer including an organosilicon polymer. The organosilicon polymer has a structure represented by R-SiO 3/2 (R is a hydrocarbon group having at least 1 and not more than 6 carbon atoms). The adhesion ratio of the organosilicon polymer on the surface of the toner particle is 90% or more.
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