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公开(公告)号：US12124185B2
公开(公告)日：2024-10-22
申请号：US17944587
申请日：2022-09-14
发明人： Taisuke Minagawa , Hiroki Asano
CPC分类号： G03G15/065 , G03G15/1675
摘要： An image forming apparatus includes a rotatable photosensitive member, a charging member, an exposure unit, a developing member, a developing voltage applying portion, a transfer member, a first transfer voltage applying portion, a second transfer voltage applying portion, a common power source, and a controller. The controller carries out control so as to execute an image forming operation, and a non-image forming operation and so as to execute, as the non-image forming operation, a cleaning operation. The controller controls a change in output of the common power source so that a value of a voltage applied from the developing voltage applying portion to the developing member during the cleaning operation is made different from a value of a voltage applied from the developing voltage applying portion to the developing member during formation of the toner image.
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公开(公告)号：US12117745B2
公开(公告)日：2024-10-15
申请号：US18067827
申请日：2022-12-19
发明人： Nao Itabashi , Naoya Kamimura
CPC分类号： G03G15/0889 , G03G15/065 , G03G15/0865 , G03G21/1676 , G03G21/1864 , G03G21/1896
摘要： In a cartridge, a housing has a developer accommodating portion and includes a first side wall and a second side wall. A coupling member is disposed at a position opposite to the developer accommodating portion with respect to the first side wall. A detection body is disposed at a position opposite to the developer accommodating portion with respect to the second side wall. A first driving force transmission member is positioned at the same side with the coupling member with respect to the first side wall, and transmits driving force from the coupling member to a rotating member. A second driving force transmission member is positioned at the same side with the detection body with respect to the second side wall, and transmits driving force from the rotating member to the detection body.
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公开(公告)号：US20240295836A1
公开(公告)日：2024-09-05
申请号：US18572770
申请日：2021-07-09
CPC分类号： G03G15/065 , G03G15/0216 , G03G15/0266 , G03G15/0291 , G03G15/045 , G03G15/0812 , G03G15/80 , G03G21/08
摘要： An apparatus includes a developer to receive a toner, and an actuator moveable between different positions. An electrical switch is responsive to an input stimulus from the actuator to control a voltage that enables or disrupts a transfer of the toner from the developer to a photoreceptor, where the electrical switch when in a first state sets the voltage at a first level to enable the transfer of the toner from the developer to the photoreceptor, and the electrical switch when in a second state sets the voltage at a second level to disrupt the transfer of the toner from the developer to the photoreceptor.
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公开(公告)号：US12066767B2
公开(公告)日：2024-08-20
申请号：US18182882
申请日：2023-03-13
CPC分类号： G03G15/065 , G03G15/0266
摘要： An image forming apparatus includes an image bearing member and a developer bearing member. A first period is from when rotational drive of the developer bearing member is started until increased to a speed at which the image forming apparatus performs image forming. A first absolute value of a difference between a developer bearing member surface potential Vdc and an image bearing member surface potential Vd, as determined when the image bearing member is facing the developer bearing member, is obtained during the first period. The value |Vdc−Vd| obtained during the first period is smaller than the value |Vdc−Vd| obtained after the first period. During the first period, the image bearing member surface potential Vd at the facing position is a first potential and, after the first period, the image bearing member surface potential Vd at the facing position becomes a second potential different from the first potential.
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公开(公告)号：US11960219B2
公开(公告)日：2024-04-16
申请号：US17979934
申请日：2022-11-03
CPC分类号： G03G15/065 , G03G15/5058 , G03G2215/00059 , G03G2215/0164
摘要： An image forming apparatus controls a generation circuit to modulate a DC component of a developing voltage based on a first correction component such that a density unevenness is reduced. The image forming apparatus further restricts the first correction component for modulating the DC component of the developing voltage such that fogging of toner that may occur on a non-exposure region which is not exposed by an exposure unit and adhesion to a photosensitive member of carrier included in a developer are reduced.
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公开(公告)号：US11906908B2
公开(公告)日：2024-02-20
申请号：US18155789
申请日：2023-01-18
发明人： Yasumasa Fujii
CPC分类号： G03G15/065 , G03G15/0806 , G03G15/0808 , G03G15/0855 , G03G15/0865 , G03G21/1652 , G03G21/1676 , G03G2221/166
摘要： A developing cartridge includes a casing, a developer-carrying member, a supply member, a developing electrode, a supply electrode, and an insulating member. The casing is configured to accommodate therein developer. The developer-carrying member is configured to rotate about a rotational axis and carry the developer thereon. The supply member is configured to supply the developer to the developer-carrying member. The developing electrode is configured to be electrically connected to the developer-carrying member. The supply electrode is configured to be electrically connected to the supply member. The insulating member insulates the developing electrode and the supply electrode with each other. The developing electrode, the insulating member, and the supply electrode are overlapped in this order in an axial direction of the rotational axis.
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公开(公告)号：US20240004337A1
公开(公告)日：2024-01-04
申请号：US18455521
申请日：2023-08-24
CPC分类号： G03G15/80 , H02M3/158 , G03G15/065 , G03G15/0808 , G03G15/5004
摘要： A power supply apparatus generates an output voltage. A boost circuit boosts a voltage supplied from a reference voltage source and generates a first power supply voltage. A processor controls switching the boost circuit on and off. A first transistor is connected to the first power supply voltage. A second transistor is connected to a collector of the first transistor. A resistance element is connected to a collector of the second transistor. A voltage source is connected to the resistance element and generates a second power supply voltage. A collector voltage, which is an output voltage, of the second transistor is controlled by controlling an amount of base current of the first transistor.
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公开(公告)号：US11835883B2
公开(公告)日：2023-12-05
申请号：US17818233
申请日：2022-08-08
CPC分类号： G03G15/065 , G03G15/5025
摘要： A controller is able to, in a case where the controller receives a correction instruction for image density, execute a phase detection mode for detecting a phase of an image bearing member and detecting a phase of a developer bearing member and change an image forming condition for an image forming unit during an image formation mode based on respective phases of the image bearing member and the developer bearing member detected in the phase detection mode and an image density of a toner pattern, and a ratio of a circumferential velocity of the developer bearing member to a circumferential velocity of the image bearing member during the phase detection mode is different from a ratio of a circumferential velocity of the developer bearing member to a circumferential velocity of the image bearing member during the image formation mode.
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公开(公告)号：US11768456B2
公开(公告)日：2023-09-26
申请号：US17846989
申请日：2022-06-22
CPC分类号： G03G15/5008 , G03G15/0225 , G03G15/0233 , G03G15/065 , G03G15/1675 , G03G15/5045
摘要： An image forming apparatus controls the number of rotations of a photosensitive drum based on information related to the use of the photosensitive drum and a suspension time in a rotation operation of rotating the photosensitive drum after a lapse of the suspension time between a first image forming operation of forming an image on a transfer material and a second image forming operation performed after the first image forming operation.
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公开(公告)号：US11714365B2
公开(公告)日：2023-08-01
申请号：US17374036
申请日：2021-07-13
发明人： Norihito Naito , Go Shindo , Masataka Mochizuki
CPC分类号： G03G15/065 , G03G15/0266 , G03G15/0815 , G03G15/0856 , G03G15/0898 , G03G15/5008 , G03G15/5037
摘要： When, in a state where a developer borne by a developer bearing member is sandwiched by an opposing portion of an image bearing member and the developer bearing member, C denotes capacitance between the image bearing member and the developer bearing member, ΔV denotes a development contrast, Q/S denotes a charge amount per unit area of the developer borne by the developer bearing member, and Δv denotes a peripheral velocity ratio which is a ratio of a peripheral velocity of the developer bearing member to a peripheral velocity of the image bearing member, a first peripheral velocity ratio is set so that |Q/S×Δv|≤|C×ΔV| is satisfied, and a second peripheral velocity ratio which is larger than the first peripheral velocity ratio is set so that |Q/S×Δv|>|C×ΔV| is satisfied.
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