公开(公告)号：US10768562B2

公开(公告)日：2020-09-08

申请号：US16534426

申请日：2019-08-07

Applicant: KONICA MINOLTA, INC.

Inventor： Katsuhide Sakai ,  Yasuhiro Koide ,  Toshiaki Tanaka ,  Akihiro Hayashi

IPC: G03G15/00

Abstract: An image forming apparatus forms an image on a sheet, and includes: a rotator used to form the image; a motor that drives the rotator rotationally; a current measurer that measures motor current flowing through a current-carrying path including a winding of the motor, at measurement timing that is timing after the motor starts up; a torque acquirer that acquires a torque value of the motor based on a measured value of the motor current; and a corrector that performs correction for cancellation of an amount of error based on one or both of a variation in characteristic corresponding to motor speed of the motor and a variation in characteristic corresponding to the motor current at the measurement timing, at the acquisition of the torque value by the torque acquirer.

公开(公告)号：US20190286022A1

公开(公告)日：2019-09-19

申请号：US16276321

申请日：2019-02-14

Applicant: Konica Minolta, Inc.

Inventor： Masayuki Fukunaga ,  Toshiaki Tanaka ,  Masayuki Watanabe ,  Mineo Yamamoto

IPC: G03G15/20

Abstract: An image forming apparatus including: a fixer that fixes a toner image formed on a recording medium by pressing and heating the recording medium nipped in a nip portion formed by causing two rotating bodies to pressedly abut on each other, and conveying the recording medium by rotating the rotating bodies; a motor that drives the rotating bodies by transmitting a torque to at least one of the rotating bodies; a torque detector that detects the torque transmitted to the rotating body by the motor; a temperature detector that detects temperature of the rotating body; a speed detector that detects a conveyance speed for conveying the recording medium by the fixer; and a controller that corrects the detected torque based on at least any one of the detected temperature and the detected conveyance speed and predicts a life of the fixer based on the corrected torque.

公开(公告)号：US09979852B2

公开(公告)日：2018-05-22

申请号：US15447902

申请日：2017-03-02

Applicant: Konica Minolta, Inc.

Inventor： Toshinori Inomoto ,  Yasuhiro Ishihara ,  Toshiaki Tanaka ,  Satoshi Chikazawa

IPC: H04N1/04 ,  H04N1/028 ,  H04N1/00

CPC classification number: H04N1/02865 ,  H04N1/00734 ,  H04N1/0285 ,  H04N1/02855 ,  H04N1/02895 ,  H04N1/04 ,  H04N2201/0094

Abstract: An image reading apparatus includes: three or more light sources configured to each emit light; a light receiving unit including a common light receiving surface configured to detect each light emitted; and an image generation unit configured to cause the three or more light sources to be switched over in a predetermined order and emit the corresponding light, and generate an image read from a document, wherein at least one of the three or more light sources includes a white light source and an optical filter, and the optical filter is configured such that a half-value width of a wavelength with respect to a maximum intensity of a spectral characteristic of the emitted light after transmission is wider than a half-value width of a wavelength with respect to a maximum intensity of the spectral characteristic of the light emitted from at least one of the other light sources.

公开(公告)号：US09335679B2

公开(公告)日：2016-05-10

申请号：US14557971

申请日：2014-12-02

Applicant: Konica Minolta, Inc.

Inventor： Toshiaki Tanaka ,  Yasuhiro Ishihara ,  Kosuke Masumoto ,  Satoshi Chikazawa

IPC: G03G15/20 ,  G03G15/00

CPC classification number: G03G15/2039 ,  G03G15/5025

Abstract: An image forming apparatus includes an image forming section to form a toner image and transfer the toner image to a recording medium and a fixing section to heat the recording medium transferred with the toner image and further an image analyzing section to extract a density value or a size value of an imaging object included in an image, and a temperature determining section to determine a minimum fixing temperature based on the density value or size value of the imaging object included in a page image. The temperature determining section determines the minimum fixing temperature to be lower when a highest one of the density values is lower than when the highest value is higher or determines the minimum fixing temperature to be lower when a largest one of the size values is smaller than when the largest size value is larger.

Abstract translation: 图像形成装置包括图像形成部分，用于形成调色剂图像并将调色剂图像转印到记录介质和固定部分，以加热用调色剂图像转印的记录介质，并且还提供图像分析部分以提取浓度值或 包括在图像中的成像对象的尺寸值和温度确定部分，用于基于包括在页面图像中的成像对象的浓度值或尺寸值来确定最小定影温度。 当最高的一个密度值低于最高值的最高值时，温度确定部分将最小定影温度确定为较低，或者当最大的一个尺寸值小于 最大尺寸值越大。

公开(公告)号：US20150030346A1

公开(公告)日：2015-01-29

申请号：US14340803

申请日：2014-07-25

Applicant: KONICA MINOLTA, INC.

Inventor： Toshiaki Tanaka ,  Yasuhiro Ishihara ,  Toshinori Inomoto

IPC: G03G15/20

CPC classification number: G03G15/2039 ,  G03G15/205 ,  G03G2215/0132 ,  G06K15/12 ,  G06K15/1822

Abstract: An image forming apparatus forms a toner image of text on a recording sheet based on PDL data prescribing text data and one or more print conditions of thereof, and thermally fixes the toner image, and includes: condition acquisition unit analyzing the PDL data to acquire, as the conditions, one or more of character number, character spacing, and line spacing from the PDL data; judgment unit judging for each condition, by comparing the condition with reference value, the judgment indicating whether the condition is suitable for ensuring fixability of the toner image if thermally fixed at a temperature that is lower than predetermined temperature; and temperature control unit, when the judgment unit judges negatively for at least one condition, setting a fixing temperature for thermally fixing the toner image to the predetermined temperature, when the judgment unit judges affirmatively for all conditions, setting the fixing temperature to the lower temperature.

Abstract translation: 图像形成装置基于规定文本数据的PDL数据及其一个或多个打印条件在记录纸上形成文本的调色剂图像，并且对色调剂图像进行热定影，并且包括：条件获取单元，分析PDL数据， 作为条件，与PDL数据中的一个或多个字符数，字符间隔和行间距; 判断单元，通过将条件与参考值进行比较，判断条件是否适合于确保在低于预定温度的温度下热定影的调色剂图像的定影性; 和温度控制单元，当判断单元对至少一个条件判断为否定时，将用于将调色剂图像热定影的定影温度设置为预定温度，当判断单元判断所有条件时，将定影温度设定为较低温度 。

公开(公告)号：US08938178B2

公开(公告)日：2015-01-20

申请号：US14028664

申请日：2013-09-17

Applicant: Konica Minolta, Inc.

Inventor： Toshiaki Tanaka ,  Yasuhiro Ishihara ,  Kosuke Sasaki

IPC: G03G15/00 ,  G03G15/20

CPC classification number: G03G15/205 ,  G03G2215/2035

Abstract: A heater control device that performs phase control of AC power and supplies phase-controlled power to a heater, the heater control device including: a control unit configured to, in the phase control, gradually increase an on-duty ratio until a target power amount is supplied to the heater; and a judgment unit configured to judge whether or not the on-duty ratio is within a predetermined range of on-duty ratios including a 50% on-duty ratio. The control unit (i) increases the on-duty ratio by a first amount while the on-duty ratio is within the predetermined range, and (ii) increases the on-duty ratio by a second amount while the on-duty ratio is not within the predetermined range. The first amount is greater than the second amount.

Abstract translation: 1.一种加热器控制装置，其对交流电力进行相位控制，向加热器供给相位控制的电力，所述加热器控制装置包括：控制部，其在所述相位控制中逐渐增加占空比直至目标功率量 供应给加热器; 以及判定单元，其判断所述占空比是否在包括50％占空比的占空比范围内。 控制单元（i）在占空比在预定范围内时将占空比增加第一量，并且（ii）在占空比不是时将占空比增加第二量 在预定范围内。 第一个数量大于第二个数量。

公开(公告)号：US09709917B2

公开(公告)日：2017-07-18

申请号：US15157304

申请日：2016-05-17

Applicant: Konica Minolta, Inc.

Inventor： Toshiaki Tanaka ,  Yasuhiro Ishihara ,  Mineo Yamamoto

IPC: G03G15/00 ,  G03G15/043 ,  G03G15/04

CPC classification number: G03G15/043 ,  G03G15/04054

Abstract: An image forming apparatus includes: an array of m light-emitting elements extending in a main scanning direction, the m being an integer satisfying m≧3; a memory that stores a cumulative light emission time of each of the m light-emitting elements; a light intensity adjusting portion that obtains a light intensity adjusting value for the each light-emitting element; an activating portion that controls the activation and deactivation of the each light-emitting element with the light intensity adjusting value; and a selecting portion that selects n light-emitting elements from an end of the array, the n being an integer satisfying n≧2 and n

公开(公告)号：US09656821B2

公开(公告)日：2017-05-23

申请号：US14982704

申请日：2015-12-29

Applicant: Konica Minolta, Inc.

Inventor： Takaki Kato ,  Toshinori Inomoto ,  Masayuki Fukunaga ,  Isao Watanabe ,  Toshiaki Tanaka

IPC: B65H7/12 ,  G03G15/00

CPC classification number: B65H7/125 ,  B65H2511/413 ,  B65H2511/524 ,  B65H2513/10 ,  B65H2515/112 ,  B65H2515/805 ,  B65H2553/414 ,  B65H2553/42 ,  B65H2557/51 ,  G03G15/703 ,  B65H2220/01 ,  B65H2220/03

Abstract: A multi-feed detection apparatus for detecting multi-feed of a sheet conveyed along a paper path is provided. The apparatus includes a first movement amount sensor disposed on the paper path to face a first surface of the sheet to detect a movement amount of the sheet; a second movement amount sensor disposed, on the paper path, in a position at which the first movement amount sensor is disposed to face a second surface of the sheet to detect a movement amount of the sheet; and a determination portion configured to determine that a conveyance state of the sheet is multi-feed when a difference between the movement amount of the sheet detected by the first movement amount sensor and the movement amount of the sheet detected by the second movement amount sensor is equal to or greater than a threshold.

公开(公告)号：US09098030B2

公开(公告)日：2015-08-04

申请号：US14221412

申请日：2014-03-21

Applicant: Konica Minolta, Inc.

Inventor： Kosuke Sasaki ,  Yasuhiro Ishihara ,  Toshiaki Tanaka

IPC: G03G15/20

CPC classification number: G03G15/2039

Abstract: An image forming apparatus having: an endless fixing belt; a heating member heating the fixing belt; a support member maintaining the fixing belt substantially circular; a pressing member in contact with the fixing belt to form a fixing nip portion; a temperature sensor; a position detector; a storage storing temperatures and positions of the fixing belt detected by the temperature sensor and the position detector; and a control unit. The control unit is operable in a characteristic storing mode and in a fixing mode. In the characteristic storing mode, temperatures of the fixing belt associated with positions are detected, and the detected temperatures and positions are stored in the storage. In the fixing mode, temperatures of the fixing nip portion are predicted with reference to the temperatures and positions stored in the storage, and the heating member is controlled such that the predicted temperatures become a target temperature.

Abstract translation: 一种图像形成装置，具有：环形定影带; 加热构件加热定影带; 保持定影带大致圆形的支撑件; 与所述定影带接触的按压构件，以形成定影夹持部; 温度传感器; 位置检测器; 存储器，存储由温度传感器和位置检测器检测的定影带的温度和位置; 和控制单元。 控制单元可以在特征存储模式和定影模式下操作。 在特征存储模式中，检测与位置相关联的定影带的温度，并且将检测到的温度和位置存储在存储器中。 在定影模式中，参照存储在存储器中的温度和位置预测定影夹持部分的温度，并且控制加热部件使得预测温度成为目标温度。

公开(公告)号：US09389552B2

公开(公告)日：2016-07-12

申请号：US14642181

申请日：2015-03-09

Applicant: KONICA MINOLTA INC.

Inventor： Satoshi Chikazawa ,  Toshiaki Tanaka ,  Kosuke Masumoto ,  Yasuhiro Ishihara

IPC: G03G15/20

CPC classification number: G03G15/2039

Abstract: An image forming apparatus includes: a sheet feeding unit configured to feed a plurality of sheets to an image forming unit one by one; the image forming unit configured to form a toner image based on image data; a fixing unit configured to fix the toner image formed on each sheet by the image forming unit with a fixing member, the fixing unit including the fixing member configured to be brought into contact with each sheet supplied from the image forming unit and heat each sheet; a measuring unit configured to measure a temperature of the fixing member; and a control unit configured to instruct the fixing unit to start and stop a temperature increasing operation, and provide the image data to the image forming unit, wherein the control unit includes: a temperature drop rate calculating unit; a temperature rise rate predicting unit; and an instructing unit.

Abstract translation: 图像形成装置包括：片材进给单元，被配置为将多张片材一个一个地供给到图像形成单元; 所述图像形成单元被配置为基于图像数据形成调色剂图像; 固定单元，其被构造成通过固定构件将由图像形成单元形成的调色剂图像固定，所述定影单元包括固定构件，其被配置为与从图像形成单元供应的每个片材接触并加热每个片材; 测量单元，被配置为测量所述固定构件的温度; 以及控制单元，被配置为指示定影单元启动和停止升温操作，并将图像数据提供给图像形成单元，其中控制单元包括：温度降低率计算单元; 温升预测单元; 和指导单位。