Konica Corporation

Konica Minolta Business Technologies, Inc.

Konica Minolta, Inc.

Kimio Nishizawa

Nobuyasu Tamura

Yutaka Miyasaka

Takaaki Kooriya

Katsuya Toyofuku

Hiroshi Tokunaga

Eiji Nomura

Kazutoshi Kobayashi

Kunihisa Yoshino

Toshihiro Takesue

Takahiro Kusunoki

Takahiro Kanmaki

An image forming device includes: an image forming section configured to form an image onto a recording medium in which sheets are laminated via an adhesive layer; a detection unit configured to detect an amount of an adhesive adhered beyond both edges of the recording medium in a width direction orthogonal to a transport direction; and a control unit configured to calculate a correction amount for correcting an image formation condition for the image forming section on the basis of a difference in the amount of the adhesive on both edges of the recording medium in the width direction detected by the detection unit.

Image forming device

An image forming apparatus may include an image carrier for carrying a toner image and a correcting toner image, a detection sensor for detecting density information of the correcting toner image; and a controller for causing the image forming unit to correct an image forming condition based on the density information detected by the detection unit to execute a stabilization control. The image forming unit may form a plurality of correcting toner images different in density over plural non-image areas. The controller may determine which mode is set between a processing speed priority mode and an image quality priority mode. The image forming unit may continuously form correcting toner images on the image carrier in a different manner depending on the mode. The detection sensor may detect density information of the correcting toner images. The image forming unit may finish a processing operation in the stabilization control under execution.

Sheet feeding apparatus and image forming apparatus with stabilization control

An image forming apparatus may include a sensor which detects a density of a patch image formed on an image carrier; an image quality control section which controls an image forming condition based on a detection value of the sensor; and a judging section which judges if the detection value has a tendency of increasing or decreasing, or not, wherein, the image quality control section compensates the image forming condition with a first compensating amount in case when the detection value does not have the tendency of increasing nor decreasing, and compensates the image forming condition with a second compensating amount of which absolute value is larger than an absolute value of the first compensating amount corresponding to the second compensating amount, in case when the detection value has the tendency of increasing or decreasing.

Image forming apparatus

This invention relates to an image forming apparatus including a developing unit which develops an electrostatic latent image formed on an image carrier by using a two-component developing agent containing polymerized toner. The developing unit includes a supply/convey member which conveys the two-component developing agent in the axial direction while agitating it and a toner density sensor which detects the toner density of the two-component developing agent. The toner density sensor is placed to be in a non-contact state with respect to the supply/convey member and oppose it with a gap of 0.8 mm or less. The diameter of the supply/convey member is set to 23 mm or more.

Image forming apparatus with a toner density sensor

In an image forming apparatus including a developing device, an inequality of 1&lE;(&agr;/100)&times;Vr&times;Hr <3.5 is satisfied, wherein Vr denotes the peripheral speed ratio of an outer circumferential surface of a developer carrying member to the outer circumferential surface of an image carrying member, Hd denotes a spacing of the outer circumferential surface of the developer carrying member to the outer circumferential surface of the image carrying member, Hh denotes an average value of a height of a magnetic brush layer, Hr denotes a ratio of an average value of the height Hh to the spacing Hd, and &agr; (%) denotes a coverage ratio of an area of the magnetic brush layer to cover the outer circumferential surface of the developer carrying member to the outer circumferential surface of the developer carrying member.

Image forming apparatus provided with developing device using magnetic brush developing method

An image forming apparatus includes an image carrier on which a latent image is formed; and a developing roller provided in the vicinity of a surface of the image carrier for conveying a two-component developer to develop the latent image, wherein the following conditional inequality (1) is satisfied, 1<(Vs/Vp)&lE;(Dsd/Dws)&times;0.129 . . . (1) where Vs/Vp represents a relative velocity of the developing roller to the image carrier, Dsd (&mgr;m) represents a distance between the surface of the image carrier and a surface of the developing roller, and Dws (mg/cm ) represents an amount of the developer which has been held and conveyed by the developing roller.

An image forming machine such as a photocopier or a printer for forming a toner image of an original document on a recording sheet. The image forming machine includes a charger for charging a photoreceptor; the photoreceptor, having a surface, for holding a toner image on the surface; a laser beam writer for writing a latent image on the surface of the photoreceptor; a multi-color developer for developing the latent image with a color toner so that a color toner image is formed on the surface in which the color toner image is superimposed for multiple times so that a multi-color toner image is formed on the surface; a mono-color developer for developing the latent image with a monochrome toner so that a monochrome toner image is formed on the surface; a transfer mechanism for transferring one of the multi-color toner image and the monochrome toner image from the surface onto the recording sheet; neutralizer for neutralizing the surface after the transfer mechanism transfers one of the multi-color toner image and the monochrome toner image onto the recording sheet; a cleaner for cleaning a residual toner on the surface after the surface is neutralized by the neutralizer; and a controller for changing a neutralizing voltage of the neutralizer being impressed onto the surface.

Image forming apparatus with an improved discharger

An image forming apparatus wherein a toner image obtained by developing a first electrostatic latent image with a first color dry toner by a first developing device and a toner image obtained by developing a second electrostatic latent image with second color dry toner which is different in color from said first color dry toner by a second developing means are superposed on an image retainer, and wherein toner feeding speeds at which the first and second developing devices develop the first and second electrostatic latent images, resepctively, are different from each other and an attached amount of the second color toner is smaller than that of the first color toner.

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Hachioji, Japan

Kimio Nishizawa