Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: An image forming apparatus including: an image forming unit including an image carrier for carrying a toner image to be transferred onto a sheet and a correcting toner image to be used for adjusting a density of the toner image, a detection sensor for detecting density information of the correcting toner image formed in a non-image area by the image forming unit, and a controller for causing the image forming unit to correct an image forming condition based on the density information to execute a stabilization control, wherein, when receiving at least one information of interruption information, mode switching information and job switching information during execution of the stabilization control, the controller causes the image forming unit continuously form non-formed residual correcting toner images different in density on the image carrier before finishing a processing operation in the stabilization control under execution.

Abstract: An image forming apparatus comprising: 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 compensate amount of which absolute value is larger than an absolute value of the first compensating amount corresponding to the second compensate amount, in case when the detection value has the tendency of increasing or decreasing.

Abstract: 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.

Abstract: A color image forming apparatus including: a plurality of developing devices for forming a black toner image and a color toner image; an image carrier for carrying toner images; a density detecting device for detecting densities of the black toner image and the color toner image each on the image carrier, the density detecting device having a light emitting element and a light sensitive element; and a controller for the density detecting device; wherein, when detecting a density of the black toner image, the controller controls a drive voltage of the light emitting element so that an amount of received light from a non-image area becomes a first predetermined value; and when detecting a density of the color toner image, the controller controls the drive voltage so that an amount of received light from a non-image area becomes a second predetermined value.

Abstract: In an image forming apparatus including a developing device, an inequality of 1≦(&agr;/100)×Vr×Hr1/3<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.

Abstract: 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.

Abstract: In an image forming apparatus including a developing device, an inequality of 1≦(&agr;/100)×Vr×Hr1/3<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.

Abstract: 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)≦(Dsd/Dws)×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/cm2) represents an amount of the developer which has been held and conveyed by the developing roller.

Abstract: An image forming apparatus comprises: 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)≦(Dsd/Dws)×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/cm2) represents an amount of the developer which has been held and conveyed by the developing roller.

Abstract: An image forming machine such as a photocopier or a printer for forming a toner image of an original document on a recording sheet.

Abstract: 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.