Abstract: An image forming system of an embodiment includes a terminal device that transmits first print data to print an image in monochrome, second print data to print the image in color and a user ID; a print data storage section that stores the first print data, the second print data and the user ID transmitted from the terminal device in an associated manner; an authentication section that authenticates a user; a list acquisition section that acquires a list including the first and second print data associated with the user ID of the user authenticated by the authentication section; a print data acquisition section that acquires one print data selected from the acquired list by the list acquisition section; and an image forming section that prints an image formed with the print data acquired by the print data acquisition section.

Abstract: An image forming system of an embodiment includes a terminal device that transmits first print data to print an image in monochrome, second print data to print the image in color and a user ID; a print data storage section that stores the first print data, the second print data and the user ID transmitted from the terminal device in an associated manner; an authentication section that authenticates a user; a list acquisition section that acquires a list including the first and second print data associated with the user ID of the user authenticated by the authentication section; a print data acquisition section that acquires one print data selected from the acquired list by the list acquisition section; and an image forming section that prints an image formed with the print data acquired by the print data acquisition section.

Abstract: A server apparatus according to an embodiment comprises an authentication section and a setting control section. The authentication section executes an authentication processing for determining whether or not a user is the valid one. The setting control section, according to an authentication result and condition information designated by the user, selects setting information which is information relating to operations of an image forming apparatus used by the user and transmits the setting information to the image forming apparatus.

Abstract: An embodiment provides an image forming apparatus including: a job acquiring unit that acquires an image forming job that gives instructions for performing forming of an image; an image forming process control unit that controls performance of the image forming job that the job acquiring unit acquires; a temperature information acquiring unit that acquires information showing temperature of the heating rotary body; a determining unit that determines whether the temperature of the heating rotary body which is acquired by the temperature information acquiring unit is equal to or higher than a predetermined stand-by temperature set as a temperature in a stand-by state that stands by to perform the image forming process, when the image forming process is completed, based on the image forming job by the image forming process control unit; and a fixing device control unit.

Abstract: A fixing device includes a fixing roller including a heat generating part, an endless belt facing the fixing roller, a first supporter which supports the belt to cause the belt to face the fixing roller at a first position, a second supporter which supports the belt at a downstream side in the rotation direction of the belt to cause the belt to face the fixing roller at a second position, and a pressure applying member having a center position, configured to urge the belt toward the fixing roller to form a nip between the fixing roller and the belt, wherein a first distance between the center position and the first position is longer than a second distance between the center position and the second position.

Abstract: An image forming device includes: a decolorable first developer decolorized by being heated to a certain decolorizing temperature or higher and fixed by being heated to a first fixing temperature lower than the decolorizing temperature; a non-decolorable second developer being fixed at a second fixing temperature higher than the certain decolorizing temperature; a conveying unit to determine a sheet printed by trial printing as a sheet for final printing, the sheet being provided with a first developer image, the conveying unit feeding the sheet for final printing toward a transferring unit to transfer a second developer image on the first developer image on the sheet for final printing; and a controller having a trial printing mode in which the first and second developer images are heated and pressed simultaneously at the second fixing temperature on the sheet for final printing.

Abstract: A fixing device includes a fixing roller including a heat generating part, an endless belt facing the fixing roller, a first supporter which supports the belt to cause the belt to face the fixing roller at a first position, a second supporter which supports the belt at a downstream side in the rotation direction of the belt to cause the belt to face the fixing roller at a second position, and a pressure applying member having a center position, configured to urge the belt toward the fixing roller to form a nip between the fixing roller and the belt, wherein a first distance between the center position and the first position is longer than a second distance between the center position and the second position.

Abstract: An embodiment provides an image forming apparatus including: a job acquiring unit that acquires an image forming job that gives instructions for performing forming of an image; an image forming process control unit that controls performance of the image forming job that the job acquiring unit acquires; a temperature information acquiring unit that acquires information showing temperature of the heating rotary body; a determining unit that determines whether the temperature of the heating rotary body which is acquired by the temperature information acquiring unit is equal to or higher than a predetermined stand-by temperature set as a temperature in a stand-by state that stands by to perform the image forming process, when the image forming process is completed, based on the image forming job by the image forming process control unit; and a fixing device control unit, which controls the fixing device, performs a first stand-by control process that increases the temperature of the heating rotary body to the sta

Abstract: According to one embodiment, an image forming apparatus includes an image forming unit configured to form a toner image on a first surface of a medium, a fixing unit configured to have a heating member which heats the first surface of the medium, and a pressurizing member which is pressed in contact with the heating member via the medium to heat a second surface of the medium, and a supply unit configured to supply a used medium to the image forming unit, a control unit configured to, when the used medium is supplied from the supply unit, control a fixing setting temperature of the pressurizing member to a temperature equal to or lower than a temperature for fixing on the unused medium, and control a fixing temperature of the heating member to a temperature equal to or higher than a temperature for fixing on the unused medium.

Abstract: It is possible to provide a technique capable of grasping the necessity of the maintenance for a plurality of maintenance-oriented components in managing a maintenance work in an image forming apparatus containing the plurality of maintenance-oriented components. A maintenance method of an image forming apparatus includes: obtaining information for a use state of each of a plurality of maintenance-oriented components; obtaining maintenance information for a state of needing maintenance, the state being preset for each of the plurality of maintenance-oriented components; determining whether or not the plurality of maintenance-oriented components lie in a state of needing maintenance, based on the obtained information for a use state and the obtained maintenance information; and reporting in order to take a look at a maintenance-oriented component which is determined to need maintenance.

Abstract: An image forming apparatus of the present invention uses sensors to detect a marker of a transfer belt, and assigns the transfer belt to detect a medium feeding position and exposure start position, whereby time or waiting time required to transfer a color toner image to an output medium at a transfer position can be reduced, and time required to obtain an output image can be reduced, while ensuring a fixing rate and color reproducibility.

Abstract: An image forming apparatus decreases the speed of moving an optional position in the circumference of a photoconductor, the speed of moving the surface of a transfer belt, and the speed of moving an optional position in the circumference of a roller body of a fixing unit, in a period from a moment when a part of the surface of a transfer belt corresponding to the rear end of the last one of a plurality of overlaid toner images passes a primary transfer position, to a moment when a part of the surface of a transfer belt corresponding to the front end of a toner image held in the transfer belt in the overlaid state reaches the primary transfer position.

Abstract: An image forming apparatus of the present invention uses sensors to detect a marker of a transfer belt, and assigns the transfer belt to detect a medium feeding position and exposure start position, whereby time or waiting time required to transfer a color toner image to an output medium at a transfer position can be reduced, and time required to obtain an output image can be reduced, while ensuring a fixing rate and color reproducibility.

Abstract: An image forming apparatus decreases the speed of moving an optional position in the circumference of a photoconductor, the speed of moving the surface of a transfer belt, and the speed of moving an optional position in the circumference of a roller body of a fixing unit, in a period from a moment when a part of the surface of a transfer belt corresponding to the rear end of the last one of a plurality of overlaid toner images passes a primary transfer position, to a moment when a part of the surface of a transfer belt corresponding to the front end of a toner image held in the transfer belt in the overlaid state reaches the primary transfer position.

Abstract: In a developing method in which a thin layer of toner is formed on the surface of a toner carrier to which a developing bias voltage is applied and the thin layer of toner is supplied to an electrostatic latent image to thereby render the electrostatic latent image visible, the improvement wherein:when let it be supposed that:a quantity of electrification of toner that adheres to a latent image holding body by development is q [C/kg];a quantity of charges accumulated by the toner due to its triboelectrification with the latent image holding body is q.sub.p [C/kg];an electric resistance of the toner carrier is R [.OMEGA..multidot.m.sup.2 ];an effective length of the toner carrier is l [m];an effective surface area of the toner carrier is S.sub.r [m.sup.2 ];a quantity of the toner that adheres to the latent image holding body by development is m.sub.p [kg/m.sup.2 ];a speed of movement of the surface of the latent image holding body is V.sub.

Abstract: In a first embodiment of the present invention, a plurality of electrode portions are contactably and approachably disposed on an electrostatic latent image holding member in order to equalize a toner image of an electrostatic latent image holding member. In a second embodiment, an elastic foaming apparatus is contactably or approachably disposed to the electrostatic latent image holding member in order to equalize the residual toner distribution on the electrostatic latent image holding member. In a third embodiment, an equalization member consisting of an electric conductor or a resistor is contactably and approachably disposed on the electrostatic latent image holding member in order to equalize the distribution of toner of the transfer residual toner image. An AC electric field may be generated between the equalization member and the electrostatic latent image holding member.

Abstract: An image forming method which includes the steps of providing a developing agent holder for holding one component developing agent layer arranged to contact a latent image holder, developing a latent image on the latent image holder and to simultaneously clean up the developing agent adhering to the surface a non-latent image area on the latent image holder, wherein the cleaning up is carried out under the condition expressed by the following formula:0.5.ltoreq.(Vd/Vp).multidot.m.ltoreq.3.0wherein ghe moving speed of the developing agent holder is defined as Vd, the moving speed of the surface of the latent image holder is defined as Vp and the developing agent adhering density is defined as m (mg/cm.sup.2), and the amount of the remaining toner after transferring that remains on the latent image phase of the latent image holder is set less than 0.35 mg/cm.sup.2.

Abstract: A developing device effects desirable development when the amount of charging of toner, q (C/g), the amount of toner deposited on the surface of a developing roller per unit area, m (g/cm.sup.2), the speed of movement of the surface of the developing roller, v (cm/sec), the available length of the developing roller, l (cm), and the magnitude of electric resistance between the surface of the developing roller and a power source for developing bias, R (.OMEGA.), are adjusted so as to satisfy the formula, .vertline.q.vertline.m.ltoreq.100/vlR. The developing device produces a developed image desirable in quality and free from background fogging when the magnitude of a developing electric current, I (A), is adjusted so as to satisfy the formula, R.ltoreq.200/I.