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公开(公告)号：US20200285177A1
公开(公告)日：2020-09-10
申请号：US16812290
申请日：2020-03-07
Applicant: Konica Minolta, Inc.
Inventor： Tatsutoshi YAMADA
IPC: G03G15/20
Abstract: In an image forming device, a sheet type detector that detects a sheet type before the sheet reaches a fixing member; a temperature detector that detects a temperature of the fixing member; and a CPU that controls a heater based on the temperature detected to (a) after receiving an image formation start instruction and before a start of detection of the sheet type by the sheet type detector, start an increase in temperature of the fixing member towards a first target temperature higher than the temperature of the fixing member when image formation start instruction is received, and (b) after completion of the detection of the sheet type and before the sheet reaches the fixing member, adjust the temperature of the fixing member to a second target temperature depending on the sheet type detected.
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公开(公告)号：US20170285556A1
公开(公告)日：2017-10-05
申请号：US15450122
申请日：2017-03-06
Applicant: Konica Minolta, Inc.
Inventor： Tatsutoshi YAMADA
IPC: G03G15/00
CPC classification number: G03G21/10 , G03G15/50 , G03G15/5008 , G03G21/0005 , G03G21/0011 , G03G21/08 , G03G21/145
Abstract: An electrophotographic image forming apparatus which sequentially performs charging, exposure, development, transfer and cleaning on each surface portion of a photoreceptor during rotation includes: a cleaning blade configured to scrape off toner from the surface of the photoreceptor; a detecting unit configured to detect a rotation angle of the photoreceptor; and a control unit configured to control each of a start process and an end process of rotation of the photoreceptor and charging, development and transfer of the photoreceptor, wherein, in the end process, the control unit estimates a position of a surface portion of the photoreceptor, at which a charged state caused by a peeling discharge remains even after the stop of the photoreceptor, from the rotation angle from the time of start of deceleration of the photoreceptor to the time of stop of the photoreceptor, and adjusts parameters necessary for the next start process or end process.
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公开(公告)号：US20190294094A1
公开(公告)日：2019-09-26
申请号：US16436294
申请日：2019-06-10
Applicant: Konica Minolta, Inc.
Inventor： Tatsutoshi YAMADA , Kazuya KITAMURA
Abstract: Provided is an image formation device including a photoreceptor configured to carry a toner image and a developer configured to form the toner image on a surface of the photoreceptor and configured such that the developer is a replaceable development unit, the image formation device including: a development bias application section configured to apply a development bias to between the photoreceptor and the developer; a stabilization control section configured to perform image stabilization control of determining a development bias value to be used in future by changing the development bias while measuring a density of the toner image formed by the developer, thereby obtaining the toner image with a target density; and a life determination section configured to determine expiration of use of the development unit when the development bias value determined by the stabilization control falls outside a preset acceptable range.
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公开(公告)号：US20190155200A1
公开(公告)日：2019-05-23
申请号：US16171832
申请日：2018-10-26
Applicant: Konica Minolta Inc.
Inventor： Tatsutoshi YAMADA
IPC: G03G15/00 , G03G15/04 , G03G15/043
CPC classification number: G03G15/5029 , G03G15/04072 , G03G15/043 , G03G15/0435 , G03G2215/00616 , G03G2215/00751
Abstract: An image formation apparatus includes: a light source configured to emit laser light; a polygon mirror configured to reflect the laser light; a photoreceptor configured to be exposed to the laser light reflected by the polygon mirror; a motor configured to rotate the polygon mirror; and a controller configured to sense a type of a sheet transported through the image formation apparatus. The image formation apparatus includes as operation modes a first mode in which no sheet type is sensed and a second mode in which a sheet type is sensed. The controller performs different processes for control regarding rotation of the motor in the first and second modes, respectively.
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Patent Agency Ranking
公开(公告)号：US20180004139A1
公开(公告)日：2018-01-04
申请号：US15619838
申请日：2017-06-12
Applicant: Konica Minolta, Inc.
Inventor： Tatsutoshi YAMADA , Kazuya KITAMURA
IPC: G03G15/00 , G03G15/01 , G03G21/20 , G03G15/06 , G03G15/043
CPC classification number: G03G15/5041 , G03G15/0152 , G03G15/043 , G03G15/065 , G03G15/5058 , G03G15/5062 , G03G15/55 , G03G21/20 , G03G2215/00569 , G03G2215/0164 , G03G2221/1624
Abstract: Provided is an image formation device including a photoreceptor configured to carry a toner image and a developer configured to form the toner image on a surface of the photoreceptor and configured such that the developer is a replaceable development unit, the image formation device including: a development bias application section configured to apply a development bias to between the photoreceptor and the developer; a stabilization control section configured to perform image stabilization control of determining a development bias value to be used in future by changing the development bias while measuring a density of the toner image formed by the developer, thereby obtaining the toner image with a target density; and a life determination section configured to determine expiration of use of the development unit when the development bias value determined by the stabilization control falls outside a preset acceptable range.
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公开(公告)号：US20190152235A1
公开(公告)日：2019-05-23
申请号：US16162951
申请日：2018-10-17
Applicant: Konica Minolta Inc.
Inventor： Tatsutoshi YAMADA
CPC classification number: B41J2/44 , B41J2/442 , B41J2/471 , H04N1/113 , H04N1/2032
Abstract: An image forming apparatus includes: a light source that emits a laser beam; a polygon mirror that reflects the laser beam; a photoreceptor that is to be exposed to the laser beam reflected by the polygon mirror; a motor that rotates the polygon mirror; and a hardware processor capable of detecting sheet type, that is, type of a sheet conveyed in the image forming apparatus, wherein the hardware processor controls to rotate the motor at a first rotation speed until the sheet type is detected, and rotate the motor at a second rotation speed determined on the basis of the sheet type after detection of the sheet type.
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公开(公告)号：US20180275598A1
公开(公告)日：2018-09-27
申请号：US15904268
申请日：2018-02-23
Applicant: KONICA MINOLTA, INC.
Inventor： Hideo MAE , Tatsutoshi YAMADA , Atsushi KAWAI , Hideaki KOMIYAMA
CPC classification number: G03G21/0088 , G03G9/0825 , G03G15/0275 , G03G15/50
Abstract: An image forming apparatus includes: a photosensitive member; a charger that charges a surface of the photosensitive member; an exposure device that forms a latent image; and a developing device that applies toner to the latent image, wherein the photosensitive member is incorporated in a detachable photosensitive member unit, and the developing device is incorporated in a detachable developing unit, the image forming apparatus including: an optimization controller that performs optimization of a charging bias of the charger and a developing bias of the developing device; and a replacement determiner that determines which of the photosensitive member unit and the developing unit is to be replaced when an optimized developing bias is out of a predetermined allowable range, wherein the replacement determiner determines that the developing unit is to be replaced, and determines that the photosensitive member unit is to be replaced.
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8.发明申请公开(公告)号：US20180275582A1
公开(公告)日：2018-09-27
申请号：US15920588
申请日：2018-03-14
Applicant: KONICA MINOLTA, INC.
Inventor： Hideaki KOMIYAMA , Atsushi KAWAI , Tatsutoshi YAMADA , Hideo MAE
IPC: G03G15/00
CPC classification number: G03G15/553 , G03G15/5054 , G03G15/75
Abstract: An image forming apparatus includes: a rotatable photosensitive member included in a photosensitive unit that is attachable and detachable; an exposing device that forms a latent image on a surface of the photosensitive member; a developing device that forms a toner image by providing toner onto the latent image by using two-component developer; an image stabilization control part that performs optimization of a parameter value of image formation while image formation is not performed; and a replacement determiner that makes determination of replacement of the photosensitive unit on a basis of an optimized value that is the parameter value optimized by the image stabilization control part, wherein the replacement determiner determines that the photosensitive unit should be replaced in a case where the optimized value corresponds to a photosensitive member replacement event that has been determined in advance.
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公开(公告)号：US20170176895A1
公开(公告)日：2017-06-22
申请号：US15377413
申请日：2016-12-13
Applicant: Konica Minolta, Inc.
Inventor： Takahiro KURODA , Kanji NAKAYAMA , Kohei HAYASHI , Tatsutoshi YAMADA
IPC: G03G15/16
CPC classification number: G03G15/1665 , G03G15/1605 , G03G15/1675 , G03G2215/0132
Abstract: An image forming apparatus includes: an image carrier configured to carry a toner image; a transfer member configured to transfer the toner image onto a transfer target member by applying a transfer voltage of the opposite polarity of the polarity of the toner image to the transfer target member, the transfer member being in contact with the image carrier; an accepting unit configured to accept a setting for changing a preset current range to a new current range, the preset current range being defined by one of a lower limit of a current flowing in the transfer target member and an upper limit of the current; a sensing unit configured to sense a magnitude of the current flowing in the transfer target member; and a control device configured to control the transfer voltage so that the magnitude of the sensed current falls within the new current range.
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