Konica Minolta, Inc.

Minolta Company, Ltd.

Konica Minolta Business Technologies, Inc.

Takahiro Tsujimoto

Akinori Kimata

Hidenori Mine

Seiichi Kirikubo

Yutaka Yamamoto

Takeshi Tamada

Akira Takasu

Shiro Umeda

Katsuhide Sakai

Hiroyuki Watanabe

Hiroaki Takatsu

Noriyuki Jinbo

Masato Ishii

Kenichi Hayashi

Takeshi Ishida

Masahiro Kamiya

Akihiro Hayashi

Hirotada Seki

Natsuyo Higashi

Katsuyuki Ikuta

Yoshikazu Naito

Tianhua Xu

Hideki Nakamura

Masayuki Watanabe

Junichi Masuda

Shinichi Yabuki

Nobuhiro Matsuo

Atsushi Yamaguchi

Hiroshi Eguchi

Takashi Honda

Akimasa Ishikawa

Kiyohito Tsujihara

Teruhiko Fujikura

Shigeo Ogino

Yukinobu Iguchi

Kunio Furukawa

Satoru Sasaki

Shigetaka Kato

Takahiro Yokoya

Naoto Sugaya

Hiroyuki Yoshikawa

Masaaki Goto

Kouji Ohara

Hideki Matsuura

Ichiro Bessho

Yoshihiko Hikari

An image forming apparatus includes a sensor that detects information relating to the first recording medium and information relating to the second recording medium; and a hardware processor that causes the sensor to detect information relating to the first recording medium conveyed first by the conveyance section and to detect information relating to the second recording medium conveyed by the conveyance section after the first recording medium, causes the conveyance section to operate such that the second recording medium is conveyed at a conveyance speed based on the information relating to the first recording medium, and causes the conveyance section to operate such that the second recording medium is conveyed at the conveyance speed maintained even when the information relating to the second recording medium after the first recording medium is detected to be different from the information relating to the first recording medium.

Image forming apparatus, method for controlling conveyance of recording medium, and non-transitory recording medium

An information processing apparatus including a hardware processor that: acquires output information of a recording medium on which an image is formed by an image forming apparatus and recording medium-related information, and determines, based on the output information and the recording medium-related information that is acquired, information on a recording medium that is recommended for use in the image forming apparatus or information on a recording medium that is not recommended for use in the image forming apparatus.

Information processing apparatus and non-transitory recording medium storing computer readable control program

An image forming apparatus that forms an image on a recording medium, including: a detector that detects a physical property of the recording medium and obtains a detection value; and a hardware processor that controls an operation of the image forming apparatus based on: the detection value detected by the detector, and at least one of: first information that relates to the recording medium and does not include the detection value or a physical property value calculated based on the detection value, and second information that does not relate to the recording medium and is acquired from outside of the image forming apparatus.

Image forming apparatus for performing image forming operation based on detected value from detector and at least one of first information that is not acquired based on the detected value or second information acquired outside the image forming apparatus

An image forming apparatus includes: a first hardware processor that receives setting of a type of a recording medium by a user; a detector that detects a type determination parameter for a recording medium including a recording medium for which setting of a type has been received by the first hardware processor; a second hardware processor that determines a type of a recording medium based on a detection result of the detector; an image former that forms an image on the recording medium; and a third hardware processor that transmits, to an external device, at least two pieces of information of information regarding the type received, information regarding the type determined by the second hardware processor, or information regarding matching or mismatching of the type received and the type determined with respect to the recording medium for which setting of a type has been received by the first hardware processor.

Image forming apparatus, type information processing method of recording medium, and program for identifying a cause of failure

A recording medium conveyance device includes a storage, a conveyer that conveys a conveyed object, an ultrasonic sensor that outputs a value indicating an attenuation amount of an ultrasonic wave caused by the conveyed object, and a hardware processor. The hardware processor executes a type detection process of detecting a type of the conveyed object based on output of the ultrasonic sensor and storing the type in the storage and an overlay detection process of detecting whether the conveyed object is in an overlay state in which a gap is present based on output of the ultrasonic sensor, and switches to either one of the type detection process and the overlay detection process. The hardware processor executes the type detection process when the type is not stored in the storage and executes the overlay detection process when the type is stored in the storage.

Recording medium conveyance device, recording medium conveyance method and non-transitory computer-readable recording medium encoded with recording medium conveyance instructions

An image forming apparatus includes: a sensor configured to detect first information related to a physical property value of a sheet, the sheet to have an image formed thereon; and a processor configured to: obtain second information related to a brand of the sheet; and store the first information and the second information in a memory, the first information being detected by the sensor, the second information being obtained by the processor.

Image forming apparatus, information processing apparatus, information collecting method, and recording medium

An image forming apparatus, includes: a media sensor that detects a sheet type; a fixer that fixes the image on a sheet; a storage that stores a fixing temperature for each sheet type; and a hardware processor that controls power supplied to the fixer by pulse-width modulation (PWM) control and controls a temperature of the fixer to the fixing temperature corresponding to the sheet type detected by the media sensor.

Image forming apparatus and temperature control method

An image formation apparatus includes an image carrier, a first charging member which abuts on the image carrier and charges the image carrier, a second charging member which abuts on the image carrier and charges the image carrier, the second charging member having such resistance characteristics as being less in variation with environmental variation than the first charging member, a power supply apparatus which can apply a voltage to each of the first and second charging members, and a control device which sets a voltage to be applied to the first charging member by the power supply apparatus based on a first amount of current which flows from the power supply apparatus through the first charging member to the image carrier and a second amount of current which flows to the image carrier through the second charging member.

Image formation apparatus

An image forming apparatus includes a heater, a first heater drive circuit which rectifies AC power from an AC power supply and subjects a current to be conducted to the heater to PWM control, and a second heater drive circuit which allows conduction from the AC power to the heater. The image forming apparatus further includes a switching circuit which sets a drive circuit which is to drive the heater to any one of the first heater drive circuit and the second heater drive circuit and a control unit which controls switching between the drive circuits by the switching circuit.

Image forming apparatus

An image forming apparatus that includes a plurality of heaters and in which a combination of each of the heaters to be turned on can be changed includes a current detection unit including a through-type current transformer in which current supply lines are inserted into or wound around a through hole; a turn-on information acquisition unit that acquires information on a turn-on mode indicating the combination of each of the heaters to be turned on as turn-on information; a connection information acquisition unit that acquires connection information on additive polarity connection and subtractive polarity connection of the heaters, wherein the current supply lines include an additive polarity connection line, and a subtractive polarity connection line; and an energization information acquisition unit that acquires information on an energized state of the plurality of heaters as energization information, based on the turn-on information, the connection information, and a current value.

Image forming apparatus acquiring energized state of a plurality of heaters

An image forming apparatus drives and rotates at least one of a photosensitive drum and a transport roller with use of a stepping motor in a multi-phase excitation mode. The image forming apparatus includes: a constant-voltage control unit controlling the stepping motor by applying a constant voltage for each phase; a constant-current control unit controlling the stepping motor by regulating an amount of current for each phase by a chopping control; a measuring unit measuring a chopping count of each phase on a per-step basis; a chopping count determination unit determining whether the chopping count of each phase is less than or equal to a predetermined count; and a control switching unit causing the constant-voltage control unit to control the stepping motor when the chopping count determination unit determines affirmatively, and causing the constant-current control unit to control the stepping motor when the chopping count determination unit determines negatively.

An induction heating device includes: a resonant circuit provided with a coil heating a workpiece inductively and a capacitor, the coil and the capacitor being coupled in parallel with each other; a switching element coupled in series with the resonant circuit; a power supply which applies to the resonant circuit, a direct-current input voltage whose instantaneous value can be changed with the lapse of time; and a power controller which controls power to the workpiece by turning the switching element ON at a certain time and changing an ON period of the switching element, and the power controller is characterized by turning the switching element ON with a delay of an integral multiple of a resonant period of the resonant circuit if a value of power to the workpiece is equal to or lower than a first threshold which is predetermined.

Induction heating device and image forming apparatus having the same

An image forming apparatus having: a power source applying alternating current voltage to the magnetizing coil; a demagnetizing coil switchable between a conductive state and a cutoff state, and when in the conductive state, cancelling out a portion of a magnetic flux produced by the magnetizing coil; a contact switch and a semiconductor switch electrically connected in parallel, and, in combination, bringing the demagnetizing coil into the conductive state or the cutoff state; and a control unit opening or closing the switches separately. The control unit: opens or closes the semiconductor switch in synchronization with a zero-crossing of the alternating current voltage at least when the contact switch is open; opens or closes the contact switch only when the semiconductor switch is closed; and opens the semiconductor switch when the demagnetizing coil brought into the conductive state by the contact switch needs to be maintained in the conductive state.

Image forming apparatus with switchable demagnetizing coil and control method

An electromagnetic induction heating apparatus comprises: a resonance circuit that includes a inductor and a capacitor; a direct-current electric power supply; and a switching element performing ON and OFF switching of electric power supplied to the resonance circuit by the direct-current electric power supply; performs intermittent control of the electric power supply by controlling the ON and OFF switching at regular intervals, and by performing control to stop the electric power supply when not controlling the ON and OFF switching, wherein during the intermittent control, the switching control unit performs gradual control such that, upon beginning the control of the ON and OFF switching, the electric power supply gradually increases to reach a target value, and upon stopping the control of the ON and OFF switching, the electric power supply gradually decreases from the target value until stopping, such that the gradual decrease involves fewer steps than the gradual increase.

Power supply and its control method for an electromagnetic induction heating apparatus, fixing device and image formation apparatus

An image forming apparatus includes a timing roller for conveying paper in the image forming apparatus, a first motor receiving supply of electric power from a power source for driving the timing roller, a second motor receiving supply of electric power from the power source, a sensor for detecting whether a jam occurs at the conveyance roller, a drive relay for cutting off supply of electric power from the power source to the first and second motors, if occurrence of a jam is detected, and a control circuit for controlling an operating state of the second motor such that regenerative power produced at the first motor due to rotation of the conveyance roller is supplied to the second motor, if occurrence of a jam is detected.

Image forming apparatus detecting occurrence of jam

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Toyokawa, Japan

Takahiro Tsujimoto