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公开(公告)号：US20240319660A1
公开(公告)日：2024-09-26
申请号：US18735339
申请日：2024-06-06
发明人： Aya ADACHI , Shougo SATO , Kazuna TAGUCHI
CPC分类号： G03G21/1832 , G03G15/04036 , G03G21/12 , G03G21/1633 , G03G21/1647 , G03G21/1814 , G03G21/1864
摘要： An image-forming apparatus includes a housing, a cover, first and second drum cartridges, first and second exposing heads, first and second guides, a waste toner tube, a shutter driving member, and an interlocking mechanism. Each of the first and second drum cartridges includes: a photosensitive drum rotatable about an axis extending in a first direction; a drum cleaner; a discharging part; and a shutter. The first and second exposing heads are mounted on the cover. The first and second guides guide respective ends of the first and second exposing heads in the first direction while the cover is opened and closed. The shutter driving member is movable in a second direction in interlocking relation to the respective shutters through the interlocking mechanism. The shutter driving member is overlapped with at least one of the first and second guides in a third direction crossing both the first and second directions.
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公开(公告)号：US12085869B2
公开(公告)日：2024-09-10
申请号：US18319289
申请日：2023-05-17
发明人： Daisuke Akagi
IPC分类号： G03G15/043 , G03G15/04 , G06K15/00 , G06K15/12
CPC分类号： G03G15/043 , G03G15/04036 , G06K15/1228 , G06K15/408 , G03G2215/0412
摘要： An image forming apparatus includes a light-emitting chip, a substrate on which a plurality of light emitting chips are mounted, a controller, and a switch. The light-emitting chip includes a light-emitting portion, which emits light exposing a photosensitive drum surface based on supply of a driving current to the light-emitting portion, and a driving portion that drives the light-emitting portion. The controller controls the driving portion by transmitting a signal to the light-emitting chip and outputs a digital signal corresponding to a target amount of light of the light-emitting portion to the light-emitting chip. Based on a control signal from the controller, the switch switches a connection state between the voltage source and the D/A converter to a first state where the voltage source supplies the reference voltage to the D/A converter, and a second state where an electrical connection between the voltage source and the D/A converter is disconnected.
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公开(公告)号：US20240201613A1
公开(公告)日：2024-06-20
申请号：US18540923
申请日：2023-12-15
申请人： Masatoshi MURAKAMI
发明人： Masatoshi MURAKAMI
IPC分类号： G03G15/04 , G03G15/00 , G03G15/043
CPC分类号： G03G15/04036 , G03G15/043 , G03G15/6564 , G03G2215/00599 , G03G2215/0158
摘要： An electrophotographic color image forming apparatus develops an electrostatic latent image with a developer to form an image and includes a photoconductor and an optical writing device. The writing device includes a light-emitting element, a light emission control element, a deflector element, a synchronization detection element, a memory, and processing circuitry. The memory stores a first light amount of the light-emitting element when a color shift is corrected. The processing circuitry corrects the color shift by adjusting a write start timing, and corrects a detection shift generated when a light amount of light incident on the synchronization detection element fluctuates. The processing circuitry calculates a detection shift correction value of the detection shift of the synchronization detection element, using the first light amount and a second light amount determined as a lighting condition of the light-emitting element, and adds the detection shift correction value to a color shift correction value.
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公开(公告)号：US12007705B2
公开(公告)日：2024-06-11
申请号：US17681226
申请日：2022-02-25
发明人： Koji Tanimoto
IPC分类号： B41J2/45 , G03G15/04 , G03G15/043 , H05B45/46 , G03G15/00
CPC分类号： G03G15/04036 , B41J2/45 , G03G15/043 , H05B45/46 , G03G15/04054 , G03G15/80 , G03G2215/0407
摘要： The print head and light emitting elements, first and second drive circuits, and a control circuit. The light emitting elements and drive circuits are spaced from each other an arrangement pitch. The first drive circuit includes a first capacitor and sets a light emission level for the first light emitting element. The second drive circuit includes a second capacitor and sets a light emission level of the second light emitting element. The control circuit is connected to the first drive circuit by a first wiring and to the second drive circuit by a second wiring and controls voltages across the first and second capacitors individually. A difference between the length of the first wiring and the length of the second wiring is less than the arrangement pitch.
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公开(公告)号：US20240168404A1
公开(公告)日：2024-05-23
申请号：US18494452
申请日：2023-10-25
发明人： Junichi YOKOI , Yoshihiro OYAMA
CPC分类号： G03G15/04036 , G02B26/124
摘要： A light source device includes: a semiconductor laser configured to emit light; a coupling lens configured to convert the light from the semiconductor laser into light beam; and a holder supporting the coupling lens. The coupling lens has: an optical surface defining an optical axis; and a flange portion protruding outward in a radial direction orthogonal to the optical axis. The flange portion includes: a first flange portion having an arcuate surface centered on the optical axis; and a second flange portion having a flat surface extending along the optical axis. The holder has: a first positioning part opposing the arcuate surface in the radial direction for positioning of the coupling lens; and a first notch through which a part of the flat surface is exposed in the radial direction. At least a part of the first flange portion is bonded to the holder.
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公开(公告)号：US20240152068A1
公开(公告)日：2024-05-09
申请号：US18492211
申请日：2023-10-23
发明人： KOICHI TANIGUCHI
CPC分类号： G03G15/04036 , G03G21/1832
摘要： An image forming apparatus includes an image carrier, an image forming unit, a measuring unit configured to measure the reflected light from the image carrier, a retaining member configured to retain the measuring unit, a shutter configured to block the light emitted from the light-emitting element, a spring member configured to pull the shutter to enter a closed state, a drive source, a drive control unit configured to control the drive source, a reference member, an adjustment unit configured to adjust the emitted light amount, and a control unit configured to control the image forming unit, the measuring unit, and the image forming unit, wherein, when the shutter enters the closed state from the open state, the drive control unit once stops the current supply to the drive source, then supplies a second current smaller than the first current to the drive source, and then stops the current supply again.
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公开(公告)号：US20240118653A1
公开(公告)日：2024-04-11
申请号：US18180902
申请日：2023-03-09
CPC分类号： G03G15/6597 , G03G9/0872 , G03G15/0121 , G03G15/0233 , G03G15/04036 , G03G15/1685
摘要： An image forming apparatus includes an electrophotographic photoreceptor that includes a conductive substrate and a photosensitive layer disposed on the conductive substrate, the electrophotographic photoreceptor having an outermost surface layer that contains a binder resin, a charge-transporting material, and a fluorine-containing resin particle, the fluorine-containing resin particle containing 0 or more and 30 or less carboxy groups per 106 carbon atoms, a charging device that charges the electrophotographic photoreceptor, an electrostatic latent image forming device that forms an electrostatic latent image on the electrophotographic photoreceptor that is charged, a developing device that houses a developer containing a toner and that develops, with the developer, the electrostatic latent image formed on the electrophotographic photoreceptor into a toner image, a transfer device that transfers the toner image onto a transfer-receiving medium, and an optical discharging device that, after the toner image is transferred onto the transfer-receiving medium and before the electrophotographic photoreceptor is charged, irradiates the electrophotographic photoreceptor with discharging light with a light quantity of 1.0 μW or more and 50.0 μW or less to perform discharging.
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8.发明公开公开(公告)号：US20240111225A1
公开(公告)日：2024-04-04
申请号：US18460832
申请日：2023-09-05
CPC分类号： G03G15/04036 , G02B26/12
摘要： A rotatable polygon mirror includes a plurality of reflecting surfaces provided in parallel to a rotational axis direction, first surface and second surface of polygonal shape perpendicular to the plurality of reflecting surface and of which each side is continued to the plurality of reflecting surfaces. The second surface is opposite to the first surface. A through hole penetrates though the first and second surfaces in parallel to the rotational axis direction and to engage with a rotational shaft of a driving portion. As seen in the rotational axis direction, the through hole has substantially similar shape to the polygonal shape of the first and the second surfaces, and vertexes of the similar shape of the through hole are different in phase from apexes of the polygonal shape of the first and second surfaces with respect to a rotational direction of the polygon mirror.
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公开(公告)号：US20240103434A1
公开(公告)日：2024-03-28
申请号：US18461751
申请日：2023-09-06
发明人： NAOKI HASHIMOTO
CPC分类号： G03G21/206 , G03G15/04036
摘要： An image forming apparatus includes a photoreceptor; an exposure portion configured to include a substrate having a plurality of light emitting portions arranged along a rotation axis direction of the photoreceptor and exposes the photoreceptor to form a latent image on the photoreceptor; a development portion configured to develop a latent image formed on the photoreceptor with toner; an exposure duct configured to guide the airflow generated by a first fan along a longitudinal direction of the substrate; a development duct configured to guide the airflow generated by a second fan along the rotation axis direction of the development portion; and a first duct communicating with the exposure duct and the development duct, the first duct configured to exhaust air introduced from the exposure duct and exhaust air introduced from the development duct.
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公开(公告)号：US20240027931A1
公开(公告)日：2024-01-25
申请号：US18350630
申请日：2023-07-11
CPC分类号： G03G15/0266 , G03G15/04036 , G03G15/0865 , G03G15/2092 , G03G21/0011 , G03G15/5004 , G03G21/02
摘要： An image forming apparatus includes an image carrying member, a charging device, an exposure device, a developing device, a development voltage power supply, and a control section. The developing device includes a development container for containing a non-magnetic one-component developer composed only of a toner, a developer carrying member having an outer circumferential surface on which a toner layer is formed, and a toner supply member that supplies the toner to the developer carrying member. The control section performs control so that, as a cumulative drive time of the developing device increases, a supply voltage Vsdc becomes larger than a reference supply voltage and a development voltage Vdc becomes smaller than a reference development voltage, thus executing control to vary the development voltage Vdc and the supply voltage Vsdc so as to increase a potential difference Vsdc−Vdc between the supply voltage Vsdc and the development voltage Vdc.
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