Konica Minolta Business Technologies, Inc.

Konica Corporation

Konica Minolta, Inc.

Konica-Minolta Holdings, Inc.

Shigetaka Kurosu

Satoshi Nishida

Hiroshi Morimoto

Kazuteru Ishizuka

Masashi Saito

Mikihiko Takada

Hiroaki Miho

Yusuke Nishisaka

Hidetoshi Katayanagi

Hideo Yamaki

Shigeo Uetake

Atsuto Hirai

Mineyuki Sako

Chikatsu Suzuki

Nobuyasu Tamura

Kazunobu Miura

Hajime Kawakami

Keisuke Oura

Erika Sawada

Yoshitada Karimai

Keiki Katsumata

Nobuyasa Tamura

An ink supply device includes: a main tank that stores ink; a sub-tank that stores the ink supplied from the main tank and supplies the ink stored to a plurality of inkjet heads connected; and a heater that heats the ink before the ink flows into the sub-tank, wherein the heater includes a plurality of ink outlet ports that can supply the ink with different temperatures to the sub-tank midway in a flow path of the ink to be heated.

Ink supply device and 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 bearing member to which a toner is supplied; a cleaning blade that removes the toner supplied onto the image bearing member; a hardware processor that performs control such that a tonner pattern for cleaning blade inspection is formed on the image bearing member; and a detector for detecting a toner that has slipped through the cleaning blade after the toner pattern has been allowed to reach the cleaning blade. The hardware processor performs control such that a contact portion of the cleaning blade with the image bearing member becomes a state in which slipping of a toner readily occurs, and identifies a defective site in the contact portion on the basis of a detected result by the detector.

Image forming apparatus and inspection method for cleaning blade

The image forming system includes an image forming apparatus and a post-processing apparatus, wherein the image forming apparatus has a fixing unit configured to heat and press a recording sheet with a transferred toner image to fix the toner image to the recording sheet, and the post-processing apparatus has a humidifying unit configured to humidify the recording sheet with the toner image fixed by the fixing unit, and a voltage applying unit configured to apply a bias voltage to the recording sheet humidified by the humidifying unit.

Image forming system, image forming apparatus, and post-processing apparatus

An image forming apparatus in which tension is applied to a recording medium during secondary transferring includes an image carrier, a first rotating member, a second rotating member, a tension releasing device, a voltage applier, a voltage measuring device, a nip width adjuster and a controller. The second rotating member sandwiches the image carrier with the first rotating member to from a nip. The tension releasing device releases the tension. The voltage measuring device measures the voltage between the first rotating member and the second rotating member applied by the voltage applier. The nip width adjuster adjusts a width of the nip. The controller controls the nip width adjuster so that a difference between a first voltage which is measured in a state where the tension is released and a second voltage which is measured in a state where the tension is applied within a predetermined range.

Image forming apparatus, image forming system and image forming method

An image forming apparatus including: an image forming section having a intermediate transfer body to carry a toner image on a photoreceptor and transfer the toner image onto a sheet of paper; a cleaning section for removing residual toner on the intermediate transfer body by bringing a cleaning blade into close contact with the intermediate transfer body; and a control section for controlling a rotation of the intermediate transfer body so as to carry out a return action of a blade configuration which stops or reverses the rotation of the intermediate transfer body, when a rotation amount reaches a predetermined value, wherein the control section carries out the return action when the rotation amount reaches a value smaller than the predetermined value, in a case where a plurality of previous printing jobs is determined to be intermittent printing.

Image forming apparatus

A cleaning device for cleaning a belt member, includes a cleaning blade; a removing member coming in contact with the surface of the belt member so as to remove foreign matter adhering on the surface of the belt member; and a contact pressure changing section to change a contact pressure between the removing member to the belt member, wherein, when the contact pressure between the removing member and a region of the belt member corresponding in position to a toner image to be not transferred to a paper sheet is made P, and the contact pressure between the removing member and a region of the belt member corresponding in position to a toner image to be transferred to a paper sheet is made P, the contact pressure changing section changes the contact pressure to satisfy the conditional formula: (PP).

Cleaning apparatus and image forming apparatus

An image forming apparatus including a transfer section for transferring a toner image formed on an image bearing member onto a sheet by pressure contact of the sheet against the image bearing member with a transfer member; a cleaning section having a cleaning blade to remove residual toner on the image bearing member; and a control section for controlling a rotation of the image bearing member so as to carry out a return action of a blade configuration which stops or reverses the rotation of the image bearing member, when the rotation amount reaches a predetermined value, wherein the control section additionally carries out the return action when the rotation amount reaches a value smaller than the predetermined value, in a case where a size of a sheet in a current job is larger than a size a sheet having been passed through in a previous job.

An electric charge eliminating device for eliminating electric charge on an image carrying member or on a recording medium carrying member which is incorporated in an image forming apparatus, comprises a needlelike electrode having a plurality of protruding sections which form a plurality of discontinuous discharge points; an insulating holder for holding the needlelike electrode; a discharging power source for applying an electric voltage to the needlelike electrode; and a conductive shielding member arranged between the needlelike electrode and the image carrying member or the recording medium carrying member.

Electric charge eliminating device and image forming apparatus equipped with the same

An image forming apparatus which forms a toner image on a transfer material, including: an image carrier which carries a toner image; a transfer section which transfers the toner images carried on the image carrier onto a transfer material; and a guide section having paired guide surfaces whose guide surfaces guide the transfer material to a transfer position of the transfer section while supporting the transfer material in between; wherein an end of one of the paired guide surfaces, which is closer to the image carrier than another one of the paired guide surfaces, has an elastic extension guide member, and a tear resistance of an leading portion of the elastic extension guide member is greater than the tear resistance of other portions of the elastic extension guide member.

Image forming apparatus having elastic extension guide member with movable portion

An image forming apparatus including an image forming section that forms an image with a recording material on a recording medium to an edge thereof, and a cleaning section that cleans off the recording material adhering to an edge surface of the recording medium after the image forming section forms the image thereon.

Image forming apparatus including a recording medium edge cleaner

There is described an image forming apparatus, which prevent toner from contaminating inside of the apparatus and the recording medium. The apparatus includes: an image bearing member; and a transferring member that press-contacts the image bearing member for transferring the toner image onto the recording medium. When the transferring member transfers the toner image onto the recording medium in such a state that the toner image is extended from an edge of the recording medium, the following relationship is fulfilled,0&#x3c;A&#x3c;B

Image forming apparatus with transferring member to transfer toner image onto the recording medium

An image forming apparatus may include a first transfer section for transferring a toner image, formed on an image carrier by utilizing a charging section, an exposing section and a developing section, onto a belt shaped intermediate transfer member; and a second transfer section for transferring the toner image on the intermediate transfer member onto a recording material by applying an electric field between a second transfer roller being provided outside the intermediate transfer member and a backup roller being provided inside the intermediate transfer member, the second transfer roller and the backup roller sandwiching the intermediate recording member and the recording material. The second transfer roller may be grounded and a bias voltage may be applied to the backup roller, and a second charging section for charging a surface of the second transfer roller with a predetermined polarity may be included.

Image forming apparatus with first and second transfer sections

An image forming apparatus having: an image forming section to form a toner image on an image carrier; a transfer section to transfer onto a transfer medium the toner image formed on the image carrier; and a pair of opposing transfer guide members to guide the transfer medium into the transfer section, wherein a front edge of one transfer guide member, arranged on a side of the image carrier out of the pair of the transfer guide members, is disposed separately from the other transfer guide member, and one side portion of the front edge of the transfer guide member is more protruded than the other side portion into a conveying direction of the transfer medium.

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Hino, Japan

Shigetaka Kurosu