公开(公告)号：US20190291492A1

公开(公告)日：2019-09-26

申请号：US16285830

申请日：2019-02-26

Applicant: Konica Minolta, Inc.

Inventor： Shigeo UETAKE ,  Shigetaka KUROSU ,  Atsuto HIRAI

IPC: B41M5/20 ,  B41J11/00

Abstract: An ink-jet recording apparatus includes a first electrification adjuster and a second electrification adjuster. The first electrification adjuster disposed to face the recording material to be conveyed supplies a charge with one polarity. The second electrification adjuster disposed downstream the first electrification adjuster in the conveying direction to face the recording material supplies the charge with opposite polarity to that of the charge supplied by the first electrification adjuster so that the ink-jet image is formed at the downstream side of the electrification adjuster.

公开(公告)号：US20190094780A1

公开(公告)日：2019-03-28

申请号：US16118158

申请日：2018-08-30

Applicant: Konica Minolta, Inc.

Inventor： Eiji TABATA ,  Nofumi MIZUMOTO ,  Makiko WATANABE ,  Shigeo UETAKE ,  Toshiya NATSUHARA

IPC: G03G15/00 ,  G03G15/16

CPC classification number: G03G15/5029 ,  G03G15/1605 ,  G03G15/1615 ,  G03G15/6517

Abstract: An image forming device includes: an endless intermediate transfer belt; and a secondary transferrer, wherein the secondary transferrer includes a secondary transfer roller and a counter roller, a value calculated from w/Vsys is defined as a nip time N [sec], when the secondary transferrer is deemed as an equivalent circuit including a resistance R1 [Ω·m2] of the secondary transfer roller, a resistance R2 [Ω·m2] of the intermediate transfer belt, a resistance R3 [Ω·m2] of the counter roller, and capacitance Cmed [F/m2] of a recording medium, in a case where a combined resistance in the equivalent circuit is defined as Rtotal [Ω·m2], and combined capacitance in the equivalent circuit is defined as Ctotal [F/m2], a value calculated from Rtotal×Ctotal is defined as a time constant τ [sec], and the image forming device further includes: a sheet detector; and a hardware processor.

公开(公告)号：US20180011428A1

公开(公告)日：2018-01-11

申请号：US15634712

申请日：2017-06-27

Applicant: KONICA MINOLTA, INC.

Inventor： Eiji TABATA ,  Nofumi MIZUMOTO ,  Toshiya NATSUHARA ,  Shigeo UETAKE ,  Keiko MOMOTANI ,  Makiko WATANABE

IPC: G03G15/16

CPC classification number: G03G15/169 ,  G03G15/162 ,  G03G15/1685

Abstract: A transfer belt is configured to transfer a toner image carried on a first main surface of the transfer belt to a recording medium. When the transfer belt is pressed with pressure application three increased at a predetermined pressure application rate and is then pressed with certain pressure application force by using a lower block provided with a hole and an upper block, k2[μm/s] satisfies 6≦k2≦30, k2[μm/s] being determined by (a−b)/{2×(t2−t1)}, where a [μm/s] represents a maximum value of a displacement amount of a measurement region that is a portion of the first main surface corresponding to the hole, b [μm] represents a convergence value thereof, t1 [s] represents a time when the maximum value is observed, and t2 [s] represents a time when the displacement amount reaches (a+b)/2 again after the maximum value is observed.

公开(公告)号：US20190294074A1

公开(公告)日：2019-09-26

申请号：US16285655

申请日：2019-02-26

Applicant: Konica Minolta, Inc.

Inventor： Shigeo UETAKE ,  Shigetaka KUROSU ,  Atsuto HIRAI

IPC: G03G15/02 ,  G03G15/00

Abstract: An electrification adjustment apparatus includes a first electrification adjuster facing the recording material conveyed for supplying charges each with one polarity, and a second electrification adjuster facing the recording material downstream of the first electrification adjuster in a conveying direction for supplying charges each with opposite polarity to that of the charge supplied by the first electrification adjuster. In the electrification adjustment apparatus, an electrostatic capacity between the recording material surface facing the second electrification adjuster, and an electrode partially or entirely formed from the conveyor member is smaller than the one between the recording material surface facing the first electrification adjuster and an electrode partially or entirely formed from the conveyor member. Either front or back surface of the recording material is in contact with the conveyor member in a region between the first and the second electrification adjusters.

公开(公告)号：US20180095376A1

公开(公告)日：2018-04-05

申请号：US15712433

申请日：2017-09-22

Applicant: Konica Minolta, Inc.

Inventor： Eiji TABATA ,  Makiko WATANABE ,  Nofumi MIZUMOTO ,  Keiko MOMOTANI ,  Shigeo UETAKE ,  Toshiya NATSUHARA

IPC: G03G15/01 ,  G03G15/16

CPC classification number: G03G15/0163 ,  G03G15/162 ,  G03G15/1675 ,  G03G15/1685 ,  G03G15/5012 ,  G03G2215/2009

Abstract: A transfer belt transfers a toner image carried on a first main surface to a recording medium. When the transfer belt is pressed by using a lower block provided with a hole and an upper block with pressurization force increased at a prescribed rate and thereafter kept constant, E [-] and t0 are curve-fitted to a function E=α×exp(−t0/τ) defined by a time constant τ [s] with respect to an amount of displacement of the transfer belt and a constant α [-], where E [-] is calculated as (a−b)/b, a [μm] represents a maximum value of an amount of displacement of a measurement region, b [μm] represents an amount of displacement of the measurement region after converged, and t0 [s] represents a time period from start of pressurization until the maximum pressurization force, and time constant τ satisfies a condition of 0.015≦τ≦0.1.

公开(公告)号：US20200257232A1

公开(公告)日：2020-08-13

申请号：US16778461

申请日：2020-01-31

Applicant: KONICA MINOLTA, INC.

Inventor： Shigeo UETAKE ,  Toru HAYASE ,  Taira KITAGAWA

IPC: G03G15/00

Abstract: Provided is an image forming apparatus including: a fixer that fixes a color material on a medium to the medium; a heater that heats a zone set in the color material fixed to the medium by the fixer; and a hardware processor that controls operations of the fixer and the heater, wherein the hardware processor performs adjustment of glossiness in an image fixed by the fixer and performs adjustment of glossiness in the zone heated by the heater, respectively, based on gloss information indicating glossiness in each part of a target image recorded on the medium.

公开(公告)号：US20180011429A1

公开(公告)日：2018-01-11

申请号：US15637482

申请日：2017-06-29

Applicant: Konica Minolta, Inc.

Inventor： Nofumi MIZUMOTO ,  Shigeo UETAKE ,  Keiko MOMOTANI ,  Eiji TABATA ,  Makiko WATANABE ,  Toshiya NATSUHARA

IPC: G03G15/16

CPC classification number: G03G15/1615 ,  G03G15/0189 ,  G03G15/161 ,  G03G15/162 ,  G03G15/167 ,  G03G15/6558 ,  G03G2215/00751 ,  G03G2215/0135

Abstract: A transfer belt includes: an elastic layer, wherein the transfer belt is used to transfer a toner image onto a recording medium, the toner image being carried on a first main surface which is one of a pair of main exposed surfaces including the first main surface and a second main surface, when, using a lower block and an upper block, the transfer belt is placed on an upper surface of the lower block, a part of the transfer belt is interposed between a curved convex surface and a curved concave surface, and a pressed region reaches a pressing force of 200 [kPa] and is constantly pressed by the pressing force, if “a” represents a maximum value of displacement of a measurement region, and “b” represents displacement of the measurement region after convergence, E [−] calculated by (a−b)/b satisfies a condition of 0.2≦E≦3.

公开(公告)号：US20160070212A1

公开(公告)日：2016-03-10

申请号：US14840172

申请日：2015-08-31

Applicant: Konica Minolta, Inc.

Inventor： Yuji KAMODA ,  Junya HIRAYAMA ,  Shigeo UETAKE ,  Tomohiko MASUDA

IPC: G03G15/20

CPC classification number: G03G15/2007 ,  G03G15/2021 ,  G03G2215/2006

Abstract: A fixing device includes: a non-contact heating portion that includes at least one non-contact heating unit which heats a toner image on a sheet; and a pressurizing and heating unit that is provided downstream in a sheet transport direction with respect to the non-contact heating portion and that pressurizes and heats the toner image. A time from a first point of time when the toner image reaches a toner melting temperature by heating of the non-contact heating portion to a second point of time when the toner image enters the pressurizing and heating unit is set equal to or more than a predetermined time. The predetermined time is a time when a ratio between the weight of the toner in the toner image before the entrance and the sum of the weight of the toner and the weight of the carrier liquid is equal to or more than 70%.

Abstract translation: 定影装置包括：非接触加热部分，其包括加热片材上的调色剂图像的至少一个非接触加热单元; 以及加压加热单元，其相对于非接触加热部在片材输送方向的下游设置并加压和加热调色剂图像。 当调色剂图像通过加热非接触加热部分达到调色剂熔融温度的第一时间点到调色剂图像进入加压单元的第二时间点的时间被设定为等于或大于 预定时间 预定时间是入口之前的调色剂图像中的调色剂的重量与调色剂的重量和载体重量之和的比例等于或大于70％的时间。