Konica Minolta, Inc.

Minolta Company, Ltd.

Konica-minolta Holdings, Inc.

Konica Minolta Business Technologies, Inc.

Atsuto Hirai

Masahiko Matsuura

Takeshi Maeyama

Masami Yamada

Eiichi Sano

Tomoo Izumi

Masahide Ueda

Hiroyuki Yamasaki

Yoshihisa Terasaka

Yuya Sato

Kazuko Fukumoto

Shigeo Uetake

Shigetaka Kurosu

Makiko Watanabe

Yuuya Sato

Takashi Kondo

Junya Hirayama

Keiko Momotani

Eiji Tabata

Kunitomo Sasaki

Satoshi Yoshida

Tetsuya Kobayashi

An image forming apparatus includes a conveyer that conveys a recording medium supporting an image; a softener that softens the image; and a powder applicator that applies powder to the surface of the softened image, in which the applied powder adheres to a range that is narrower in a width direction orthogonal to a conveyance direction of the recording medium conveyed by the conveyer than a maximum width of the image to be supported by the recording medium.

Image forming apparatus

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.

Ink-jet recording apparatus

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.

Electrification adjustment apparatus and image forming apparatus

An image forming apparatus includes an image carrying member, a developing device, a cleaning unit and a processor. The developing device performs development with a developer containing a toner and a lubricant. The processor obtains information on a lubricant amount in the developing device; obtains, with respect to each section formed by dividing a surface of the image carrying member in a rotating shaft direction of the image carrying member, a partial coverage from electrostatic latent image writing information for a predetermined period about the section; sets, for the section having the partial coverage of a predetermined value or less, a developer supply amount for a patch to be formed outside an image forming region on the image carrying member, based on the above information; and causes the developing device to supply the set developer supply amount so that the patch is formed.

Image forming apparatus, image forming method and storage medium

An image forming apparatus includes: an image bearing member to which lubricant is supplied; a developing section that forms a toner image by attaching toner to an electrostatic latent image formed on the image bearing member; and a control section that controls an amount of the lubricant in the developing section based on an area ratio of the toner image formed on the image bearing member and a development condition when the toner image is formed by the developing section.

Image forming apparatus, image forming system and lubricant amount control method

The present wet development device includes a developer carrying member, a supply member that supplies a liquid developer to the developer carrying member, a charger that charges the liquid developer on the developer carrying member, a cleaner that removes the liquid developer on the developer carrying member, and a bias applying member that applies alternating bias in contact with the developer carrying member before removing by the cleaner. In a direction in alignment with an axis of rotation of the developer carrying member, a range to which the alternating bias is applied by the bias applying, member is located within a range in which the liquid developer is supplied onto the developer carrying member.

Wet development device and wet image forming apparatus

An image forming apparatus includes an image bearing member to which lubricant is supplied; a toner image forming section; and a patch image forming section and a control section configured to control the toner image forming section and the patch image forming section such that a first development condition for forming the patch image and a second development condition for forming the toner image are different from each other.

Image forming apparatus, image forming system and control method

An image forming apparatus includes: a latent image bearing body on which a latent image is formed; a lubricant supplying unit configured to supply lubricant to the latent image bearing body; a developing unit configured to develop the latent image as a toner image by supplying the lubricant taken in from the latent image bearing body to the latent image bearing body together with charged toner; a transfer unit configured to transfer the toner image to an image bearing body at a transfer position by applying a transfer voltage to the toner image; and a control unit configured to control application of the transfer voltage, wherein the lubricant is charged to a polarity opposite to a charging polarity of the toner, and based on an area ratio of a transferred image and the number of transferred sheets, the control unit controls the transfer voltage to be applied.

Image forming apparatus, image forming method, and transfer voltage control program

A supply member of this wet type image forming apparatus has a surface rotating in a direction the same as a surface of a developer carrier at the same peripheral velocity at a portion abutting to the developer carrier. A control unit causes toner particles on the supply member to move to the developer carrier by providing a potential difference between the developer carrier and the supply member and controls an amount of toner particles on a latent image carrier by controlling electric power of a first charging member.

Wet-type image forming apparatus

An image forming apparatus includes: a latent image carrier; an image forming unit configured to form, on the latent image carrier, a toner image using a developer including a toner and a lubricating external additive charged with an opposite polarity to a charge polarity of the toner; a transfer device configured to electrostatically transfer, at a transfer position, the toner image formed by the image forming unit to a transfer medium; and a cleaning device configured to remove the toner remaining on the latent image carrier after passing the transfer position. The transfer device is configured to control a transfer voltage applied at the transfer position, based on an area ratio of an image to be printed.

Image forming apparatus for controlling a transfer voltage applied to transfer a toner image, and method and non-transitory storage medium

A wet-type developing device and a wet-type image forming apparatus each employ a developer including a carrier liquid and toner particles dispersed in the carrier liquid. A charging unit is applied with positive voltage. A neutralizing unit is applied with negative voltage. The charging unit and the neutralizing unit are made different from each other in one of a sectional configuration and a length to a developer carrier such that an absolute value of a voltage-current characteristic of the neutralizing unit becomes smaller than an absolute value of a voltage-current characteristic of the neutralizing unit including a constituent element equal to a constituent element of the charging unit.

Wet-type developing device and wet-type image forming apparatus with charging unit and neutralizing unit

In the present wet-type image formation apparatus, when setting a standard image formation condition, a control unit adjusts both a conveyance amount of toner and a charge amount of the toner in order to obtain a predetermined developing characteristic. During normal image formation, the control unit obtains the image density of a patch image formed at a high contrast potential and the image density of a patch image formed at a low contrast potential, adjusts the conveyance amount of the toner when the image density of the patch image formed at the high contrast potential is varied from the developing characteristic for the standard image formation condition, and adjusts the charge amount of the toner when the image density of the patch image formed at the low contrast potential is varied from the developing characteristic for the standard image formation condition.

Wet-type image formation apparatus adjusting toner conveyance amount and toner charge amount

When a toner charging amount for toner in a liquid developer conveyed to a development portion is set, a wet-type image formation apparatus performs a sensing operation in which a sensing unit senses image densities of a plurality of patch images formed at different development biases with the toner charging amount being set to a constant value, and a setting operation in which, in a case where a control unit calculates current development characteristics based on the image densities of the plurality of patch images sensed by the sensing unit, and determines that the current development characteristics are not included within a set target range, the control unit controls a charging unit to set the toner charging amount such that the development characteristics are included within the set target range.

Wet-type image formation apparatus

An image forming apparatus includes: a development member carrying developer for forming a toner image on an image carrier; a cleaning member in contact with the development member for removing the developer left on the development member; a carrying member provided in contact with the development member, for carrying the supplied developer to the development member; a driving part driving at least one of the carrying member and the development member; and a regulating mechanism for separating the cleaning member and the development member from each other. The driving part causes preliminary rotation of the development member and the carrying member with the cleaning member separated from the development member, before starting main rotation for image formation.

Image forming apparatus with separation control of developing member and cleaning member during preliminary rotation

A wet-type image forming apparatus forms a toner image on an image carrier using liquid developer containing carrier liquid and toner dispersed therein. The apparatus includes: a developing member carrying the liquid developer to develop a latent image thereby forming the toner image on the image carrier; a charger for charging the liquid developer on the developing member according to a current applied on the charger; a measuring member for measuring a potential of the liquid developer charged by the charger; and a controller for controlling an amount of the liquid developer on the developing member, before the toner image is formed on the image carrier, by setting plural values of the current to be applied on the charger and controlling the amount of the liquid developer based on results of measurement of potentials of the liquid developer charged by the charger with the plural values of the applied current.

Wet-type image forming apparatus that controls the amount of liquid developer based on the rate of change of the electric potential of the liquid developer

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Ikoma, Japan

Atsuto Hirai