Konica Minolta, Inc.

The Yokohama Rubber Co., Ltd.

Konica Minolta Business Technologies, Inc.

Tomohiro Kawasaki

Tatsuya Furuta

Hiroyuki Saito

Tetsuya Ishikawa

Shota Sakurai

Ryoei Ikari

Kazuhiro Saito

Aiko Kubota

Kazuteru Ishizuka

Wataru Watanabe

Takenobu Kimura

Kazutoshi Kobayashi

Kei Okamura

Keiki Katsumata

Natsuko Kawai

Kei Yuasa

Yoshiki Nakane

Hiroshi Akita

Seiko Itagaki

Shigeru Yamauchi

Futoshi Okazaki

Misaki Matsumura

Shinji Ogawa

Eri Yagi

Hidenori Uechi

An image forming apparatus includes: an image carrier; an exposing device; a developing device with a developing roller; a development current detector that detects development current between the image carrier and the developing roller; and a hardware processor. Under an image forming condition, the hardware processor causes the exposing device to draw, on the image carrier, a development current-detection pattern that includes a solid image and a halftone image that follows the solid image in an image-conveying direction of the image carrier, causes the developing device to develop the development current-detection pattern, obtains information on a chronological change of the detected development current from the development current detector, and determines whether or not a ghost image due to the solid image occurs based on a temporary drop of the detected development current during development of the halftone image.

Image forming apparatus

Provided is an image forming apparatus including a developer that performs development with toner, the image forming apparatus including a vibrator that applies vibrations to a vibrated portion of the developer, and a hardware processor that controls the vibrator. The hardware processor determines a toner leakage level based on a result of detecting toner leakage adhering to a sheet caused by the image forming apparatus, settles a vibrating condition of the vibrator in accordance with the toner leakage level, and causes the vibrator to perform a vibrating operation under the settled vibrating condition.

Image forming apparatus and recording medium

An image forming apparatus includes: a developer carrier; a screw-shaped developer feeder that feeds developer to the developer carrier; an image carrier on which an image is imaged with toner of the developer; a developing current detector that detects developing current between the image carrier and the developer carrier during imaging; and a controller that detects image density failure that is periodic and oblique to a rotation direction of the image carrier. The controller causes a stripe image to be imaged on the image carrier and analyzes change of the developing current with time during imaging of the stripe image, thereby detecting the image density failure. The stripe image has a width in a length direction of the image carrier narrower than a period of a blade of the developer feeder and has a length in the rotation direction longer than a period of the image density failure.

Image forming apparatus and detecting method of image density failure

The present technology provides a hot melt composition containing: styrene-based thermoplastic elastomer having a weight average molecular weight of 300000 or more; tackifier; a first paraffin oil having a weight average molecular weight of 1000 or more; and a second paraffin oil having a weight average molecular weight of less than 1000.

Hot melt composition

A developing device for forming an image by developing an electrostatic latent image formed on an image carrier with a developer, includes: a developing container that accommodates the developer; a developing roller that faces the image carrier, is disposed adjacent to the developing container, and conveys the developer accommodated in the developing container to the image carrier, and a developer discharging part that is provided in the developing container and discharges a part of the developer, wherein a discharge amount of the developer discharged by the developer discharging part is controlled on the basis of a charge amount of a toner included in the developer.

Developing device and image forming device

An image forming apparatus includes: an image former that forms a toner image based on input image information by superposing toners of plural colors on a recording material; a fixer that fixes the toner image formed on the recording material; a toner amount calculator that calculates, from the input image information, an amount of toners to be superposed on the recording material; and a hardware processor that controls the image former to supply an assistance toner that assists melting of the toners used for forming the toner image based on the input image information by an amount corresponding to the calculated amount of toners.

Image forming apparatus and non-transitory recording medium storing computer readable program

An image forming apparatus that forms an image on a transfer material in an image forming mode, includes: a photoreceptor rotatable in a predetermined rotation direction; a developer that forms a toner image on the photoreceptor using a two-component developing agent including toner and a carrier; a transferor that transfers the toner image on the photoreceptor onto the transfer material; a carrier collector that applies an electric field corresponding to a collecting bias to a carrier adhering to the photoreceptor to collect the carrier; a carrier detector that detects a carrier remaining on the photoreceptor after collecting the carrier by the carrier collector; and a hardware processor that sets the collecting bias in the image forming mode on the basis of the amount of carriers detected by the carrier detector when a carrier adhesion detecting mode for forcibly causing a carrier to adhere to the photoreceptor is executed.

Image forming apparatus and control program for removing carriers on a photoreceptor

An image forming apparatus includes: an image carrier that carries a toner image; a developing part that accommodates two-component developer containing toner and a carrier, and supplies the toner to the image carrier; a transferor that transfers the toner image on the image carrier onto paper; a cleaning member that removes the toner remaining on the image carrier; and a hardware processor that controls toner discharge operation in the developing part according to a toner discharge condition, in which the hardware processor sets the toner discharge condition so that a replacement time of the cleaning member overlaps with a replacement time of another consumable.

Image forming apparatus, method of discharging toner, and program for discharging toner

A developing device includes: a developing roller that carries a developer; a developing tank that supplies the developing roller with the developer replenished from a replenishing port; a discharger that has a discharge port connecting to the developing tank and discharges the developer from the developing tank; a supply amount acquirer that acquires a supply amount of the developer to be supplied to the developing tank; a discharge amount acquirer that acquires a discharge amount of the developer to be discharged through the discharge port; a developer amount adjuster that adjusts an amount of the developer in the developing tank; and a hardware processor that controls the developer amount adjuster to adjust the amount of the developer in the developing tank to a value within a predetermined range, in accordance with the acquired supply amount and the acquired discharge amount of the developer.

Developing device and image forming apparatus

A developing device includes: an image bearing member; a plurality of developing rollers each supplying toner to the image bearing member, and developing an electrostatic latent image on the image bearing member into a toner image; and a hardware processor analyzing values representing density fluctuations during the toner being supplied from the developing rollers to the image bearing member, for the respective developing rollers, and correcting a control value for an image density of at least one developing roller among the developing rollers based on an result of the analyzing so as to eliminate the density fluctuations, in consideration of an effect caused at the developing roller on a downstream side in a rotational direction of the image bearing member by correcting the control value for the image density of the developing roller on an upstream side.

An image forming apparatus includes: an image former that forms on a recording material a toner image based on input image information; a fixer that fixes a toner image formed on the recording material; and a hardware processor that controls the image former and the fixer in which the hardware processor controls the image former to supply, to a region where no toner is provided between toner images based on the input image information, complementing toner having a thermal conductivity higher than a thermal conductivity of toner for forming the toner image based on input image information.

Image forming apparatus which supplies complementing toner to a region between formed toner images in which no toner is provided, and non-transitory computer-readable recording medium storing image forming program

A developing device, includes a first storage chamber that stores developer; a first conveyor that is disposed in the first storage chamber and conveys developer; a developer supporter that is disposed so as to face an image supporter, supports developer conveyed from the first conveyor, and conveys the supported developer to a developing position where an electrostatic latent image formed on the image supporter is developed; a second storage chamber that stores developer conveyed via the developing position and communicates with the first storage chamber at a confluent opening; a second conveyor that is disposed in the second storage chamber and conveys developer conveyed via the developing position toward the confluent opening; and a third storage chamber that stores developer overflowing in a case where an amount of developer in the second storage chamber becomes a predetermined amount or more.

An image forming apparatus includes: a color toner supply unit configured to supply, to a recording medium, color toner for forming a toner image on the recording medium; a transparent toner supply unit configured to supply, to the recording medium, transparent toner having no releasability from a surface member bonded to a surface of the recording medium on which the toner image is formed; and a control unit configured to control the transparent toner supply unit to supply the transparent toner to cover the color toner supplied from the color toner supply unit to the recording medium.

Image forming apparatus and image forming system

An image forming apparatus includes: an image carrier; a developing unit which supplies a toner contained in a developer to the image carrier; a lubricant supply unit which supplies a lubricant to the image carrier; a lubricant amount detection unit which detects an amount of the lubricant which is supplied to the image carrier from the lubricant supply unit and is thereafter incorporated into the developing unit from the image carrier; and a control unit which controls the developing unit to discharge the lubricant from the developing unit according to the amount of the lubricant detected by the lubricant amount detection unit.

Image forming apparatus and lubricant discharge control method

An image forming apparatus includes: an image forming section configured to form a toner image on a sheet having a paste component; and an end pressing section provided on an upstream side of the image forming section in a sheet conveyance direction, and configured to exert a pressure on an end portion of the sheet while moving from a center toward an end of the sheet in a sheet width direction orthogonal to the sheet conveyance direction.

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Sagamihara, Japan

Tomohiro Kawasaki