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公开(公告)号：US10895822B2
公开(公告)日：2021-01-19
申请号：US16684782
申请日：2019-11-15
发明人： Takehiro Kojima , Teppei Nagata , Ryota Fujioka , Shota Takami
IPC分类号： G03G15/06 , G03G15/095
摘要： An image forming apparatus includes a control unit configured to execute a stop mode in which, after image forming operation is stopped, a developer bearing member is rotated for a predetermined time with a potential difference between a film forming electrode and a developer bearing member set to zero or smaller than that during image formation, and thereafter, the rotation of the developer bearing member is stopped.
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公开(公告)号：US10747146B2
公开(公告)日：2020-08-18
申请号：US16545050
申请日：2019-08-20
发明人： Teppei Nagata , Takehiro Kojima , Ryota Fujioka , Shota Takami
摘要： A developer container is capable of supplying a liquid developer to a portion, of a surface of a cleaning roller, between a cleaning position X and a contact position Y with respect to a rotational direction of the cleaning roller. A free end of a cleaning blade is positioned in a range of 65° or more and less than 95° as a positive angle of the rotational direction of the cleaning roller when a line passing through a center of the cleaning roller and an upper end portion of the cleaning roller with respect to a direction of gravitation is at 0° (reference line G). In this case, the cleaning blade is disposed so that an angle α between a line F perpendicular to a line E connecting the center of the cleaning roller and the free end of the cleaning blade, and the cleaning blade is in a range of 35° or more and less than 60° .
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公开(公告)号：US20200081369A1
公开(公告)日：2020-03-12
申请号：US16684782
申请日：2019-11-15
发明人： Takehiro Kojima , Teppei Nagata , Ryota Fujioka , Shohta Takami
IPC分类号： G03G15/06 , G03G15/095
摘要： An image forming apparatus includes a control unit configured to execute a stop mode in which, after image forming operation is stopped, a developer bearing member is rotated for a predetermined time with a potential difference between a film forming electrode and a developer bearing member set to zero or smaller than that during image formation, and thereafter, the rotation of the developer bearing member is stopped.
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公开(公告)号：US20210109470A1
公开(公告)日：2021-04-15
申请号：US17065163
申请日：2020-10-07
发明人： Yoshiro Tsukada , Takehiro Kojima
摘要： In an image forming apparatus, in a case where a power of the apparatus is turned from OFF to ON, a rotation drive unit rotationally drives each of a developing roller, a first conductive roller, and a second conductive roller in a state where a liquid developer supplied to a developer container by a supply device has reached a supply position, and a bias application unit applies a bias to each of the developing roller, the first conductive roller, and the second conductive roller after the developing roller rotates at least once, in the state where the liquid developer supplied to the developer container by the supply device has reached the supply position.
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公开(公告)号：US10915038B2
公开(公告)日：2021-02-09
申请号：US16424795
申请日：2019-05-29
发明人： Takehiro Kojima
摘要： An image forming apparatus includes a controller for performing a mode, in which an image portion potential is controlled during image formation so that an absolute value of the image portion potential is a first value when a resistance value of a developing roller based on a value of a current flowing between the developing roller and an electroconductive member is smaller than a predetermined value when a predetermined potential difference between the developing roller and the electroconductive member is formed during non-image formation and so that an absolute value of the image portion potential is a second value smaller than the first value when a resistance value of the developing roller based on a value of current flowing between the developing roller and the electroconductive member is not smaller than the predetermined value when the predetermined potential difference between the developing roller and the electroconductive member is formed during non-image formation.
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公开(公告)号：US10606200B2
公开(公告)日：2020-03-31
申请号：US16424781
申请日：2019-05-29
发明人： Takehiro Kojima
摘要： A developing roller is rotatable while carrying a liquid developer containing toner and a carrier liquid and contains an electroconductive agent, and includes a squeeze roller provided in contact with the developing roller through at least the carrier liquid, a voltage source capable of generating a potential difference between the developing roller and a squeeze roller, and a current detecting sensor for detecting a current passed between the developing roller and the squeeze roller. In addition, a controller controls the voltage source, and a display device outputs information on a lifetime of the developing roller. The controller outputs the information on the lifetime from the display device on the basis of a detection result by the current detecting sensor when a predetermined potential difference is generated between the developing roller and the squeeze roller by the voltage source.
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公开(公告)号：US20190369526A1
公开(公告)日：2019-12-05
申请号：US16545050
申请日：2019-08-20
发明人： Teppei Nagata , Takehiro Kojima , Ryota Fujioka , Shohta Takami
IPC分类号： G03G15/11
摘要： A developer container 53 is capable of supplying a liquid developer to a portion, of a surface of a cleaning roller 58, between a cleaning position X and a contact position Y with respect to a rotational direction of the cleaning roller 58. A free end of a cleaning blade 56 is positioned in a range of 65° or more and less than 95° as a positive angle of the rotational direction of the cleaning roller 58 when a line passing through a center of the cleaning roller 58 and an upper end portion of the cleaning roller 58 with respect to a direction of gravitation is at 0° (reference line G). In this case, the cleaning blade 56 is disposed so that an angle α between a line F perpendicular to a line E connecting the center of the cleaning roller 58 and the free end of the cleaning blade 56, and the cleaning blade 56 is in a range of 35° or more and less than 60°.
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公开(公告)号：US20190286009A1
公开(公告)日：2019-09-19
申请号：US16424795
申请日：2019-05-29
发明人： Takehiro Kojima
摘要： During non-image formation, a setting mode in which a predetermined potential difference is generated by a first voltage applying means (step S5) and depending on a detection result by a current detecting means (step S8), a developing contrast and a fog-removing voltage are set is executable, and during image formation, the potential difference set in the setting mode is generated by at least one of a second voltage applying means, a charging means and an exposure means (steps S9, S10).
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公开(公告)号：US11048188B2
公开(公告)日：2021-06-29
申请号：US16581991
申请日：2019-09-25
发明人： Ryota Fujioka , Teppei Nagata , Takehiro Kojima , Shota Takami
摘要： A developing device includes a rotatable developer carrying member carrying a liquid developer on a carrying surface for developing an electrostatic latent image borne on an image bearing member, and an end portion restricting member, provided in contact with the developer carrying member at an end portion of the developer carrying member with respect its rotational axis direction, for restricting movement of the liquid developer in the rotational axis direction of the developer carrying member. A contact angle of the liquid developer to a side surface of the end portion restricting member on a side where the developer carrying member carries the liquid developer is larger than a contact angle of the liquid developer to the carrying surface of the developer carrying member, and the contact angle of the liquid developer to the side surface of the end portion restricting member is 45° or more.
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公开(公告)号：US10816917B2
公开(公告)日：2020-10-27
申请号：US16707443
申请日：2019-12-09
发明人： Shota Takami , Takehiro Kojima , Ryota Fujioka , Teppei Nagata
摘要： A developing apparatus includes a developer bearing member, a developer container, and a storage tank arranged within the developer container to store liquid developer to be supplied to the developer bearing member. The storage tank includes a first bottom surface including an inclined portion that is inclined downward with respect to a horizontal direction in a rotational axis direction of the developer bearing member, and a discharge port arranged on a lower end of the inclined portion of the first bottom surface. The developer container includes a second bottom surface including an inclined portion that is inclined downward with respect to the horizontal direction toward an opposite direction as the inclined portion of the first bottom surface in the rotational axis direction of the developer bearing member, and a discharge port arranged on a lower end of the inclined portion of the second bottom surface.
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