Abstract: An image forming apparatus changes over an electric potential on an image bearing member in response to an attenuation region in which a remaining potential on a developing member is attenuating after a developing bias applied to the developing member has been turned off after completion of an image forming operations. Accordingly, it is possible to mitigate adherence of developer due to a large potential difference between the developing member and the image bearing member.

Abstract: In an image forming apparatus which has an image bearing member for bearing a toner image, a transferring device for transferring the toner image, a cleaning device for recovering waste toner which remains on the image bearing member, a containing device for containing the waste toner which is recovered, a near-end position detecting device, an image information detecting device for detecting information about an image on the image bearing member, and an image formation state recognizing device for recognizing an image formation state, the image forming apparatus including a full determining device which accumulates pixel amount on the basis of detection result by the image information detecting device, and recognition result by the image formation state recognizing device when it is detected by the near-end position detecting device that the waste toner is contained to a near-end position in the containing device, and determines that the waste toner becomes full when accumulation result reaches a predetermin

Abstract: A fixing apparatus for fixing a toner image on a recording material by heat has a pair of rotary members having a heat generating member, and rotatable in contact with each other, electric power supply controller for controlling electric power supply to the heat generating member so that the temperature of at least one of the rotary members may become a set temperature, and rotation time setting unit for setting a time for which the electric power supply control is effected after the shift from a warming-up operation to a fixing capable state and the pair of rotary members are rotated continuously from rotation during the warming-up operation, on the basis of the time of the warming-up operation.

Abstract: There is provided an image forming apparatus capable of setting up a tab sheet mode-operating and configuring environment in which an effective tab sheet mode output can be obtained by simple selecting and designating operations, A designating device designates a type of sequence of tabs of each of tab sheet bundles set in the sheet feed devices such as cassettes 21a-21d and multi manual feed tray 27 etc. A determining device is responsive to a user's instruction for feeding tab sheets and selection of a combination of one of the sheet feed devices and one of the sheet discharge devices such as face-up discharge tray 2 and face-down discharge tray 3, for determining whether a combination of the selected sheet feed device, the selected sheet discharge device, and the type of sequence of tabs of the tab sheet bundle set in the selected sheet feed device is valid or not.

Abstract: An image forming apparatus includes an apparatus main assembly, and a process cartridge detachably mountable to the apparatus main assembly, including a driving force receiver to be connected to a driver of the apparatus main assembly and a non-contact memory for carrying out non-contact data communication with a receiver of the apparatus main assembly, wherein the apparatus main assembly performs rotational driving of the driver before reading out data from the non-contact memory.

Abstract: An image forming apparatus includes an apparatus main assembly, and a process cartridge detachably mountable to the apparatus main assembly, including driving force receiving means to be connected to driving means of the apparatus main assembly and a noncontact memory for carrying out noncontact data communication with receiving means of the apparatus main assembly, wherein the apparatus main assembly performs rotational drive of the drive means before reading out data from the noncontact memory.

Abstract: There is provided an image forming apparatus which is capable of quickly performing measurements required for obtaining a proper image density. The image forming apparatus having a plurality of image forming apparatuses performs an image density adjustment control process by carrying out a maximum density control process at a reference image forming speed, and carrying out a density gradation control process at each of the plurality of image forming speeds. Image forming conditions for carrying out the density gradation control process at speeds other than the reference image forming speed are determined by performing operation on image forming conditions determined by the maximum density control process carried out at the reference image forming speed.

Abstract: There is provided an image forming apparatus capable of setting up a tab sheet mode-operating and configuring environment in which an effective tab sheet mode output can be obtained by simple selecting and designating operations, A designating device designates a type of sequence of tabs of each of tab sheet bundles set in the sheet feed devices such as cassettes 21a-21d and multi manual feed tray 27 etc. A determining device is responsive to a user's instruction for feeding tab sheets and selection of a combination of one of the sheet feed devices and one of the sheet discharge devices such as face-up discharge tray 2 and face-down discharge tray 3, for determining whether a combination of the selected sheet feed device, the selected sheet discharge device, and the type of sequence of tabs of the tab sheet bundle set in the selected sheet feed device is valid or not.

Abstract: The present invention provides an image forming apparatus which, when switching operation from color image forming operation to monochromatic image forming operation, forms a monochromatic image on each of a prescribed number of sheets by stopping a part of the functions of yellow, magenta and cyan image forming sections of the color image forming operation, and thereafter, forms a monochromatic image only with a black-only image forming section, thereby permitting extension of service life of the image forming sections, while improving the productivity.

Abstract: The present invention has as its object to prevent faulty fixing after rising, and in order to achieve this object, a fixing apparatus for fixing a toner image on a recording material by heat has a pair of rotary members having a heat generating member, and rotatable in contact with each other, electric power supply control means for controlling electric power supply to the heat generating member so that the temperature of at least one of the rotary members may become a set temperature, and rotation time setting means for setting a time for which the electric power supply control is effected after the shift from a warming-up operation to a fixing capable state and the pair of rotary members are rotated continuedly from rotation during the warming-up operation, on the basis of the time of the warming-up operation.

Abstract: An image forming apparatus includes a fixing unit that performs thermal fixation for a sheet on which a developer has been transferred, and a controller that sets a temperature of the fixing unit at one of a first temperature for fixing a developer expressing a monochrome image on a sheet and a second temperature for fixing developers expressing a color image on a sheet, wherein if a color page is contained in an image forming job, the controller sets the temperature of the fixing unit at the second temperature and starts the image forming job.

Abstract: A color image forming apparatus including image forming portions for respective color components of yellow, magenta, cyan, and black. It can be set whether a discriminating function of discriminating whether an original image is a color image or a monochromatic image is used. If the use of the discriminating function is set, a preparatory operation of forming the image in a full-color recording mode is performed before obtaining a result of the discrimination. When the result of the discrimination is monochrome, the image formation in a monochrome recording mode is executed after a shift from the full-color recording mode to the monochrome recording mode. If configured to perform the preparatory operation of forming the image in the monochrome recording mode before obtaining the result of the discrimination, when the result of the discrimination is color, the image formation in the full-color recording mode is executed after a shift from the monochrome recording mode to the full-color recording mode.

Abstract: An image forming apparatus including an image forming unit for forming an image on a recording sheet including a special sheet, and a controller for allowing the image forming unit to carry out an image forming sequence which forms an image on the recording sheet, wherein the controller allows the image forming unit to control a cleaning operation of the image forming unit in response to image formation on the special sheet by the image forming unit.

Abstract: An image forming apparatus includes a fixing unit that performs thermal fixation for a sheet on which a developer has been transferred, and a controller that sets a temperature of the fixing unit at one of a first temperature for fixing a developer expressing a monochrome image on a sheet and a second temperature for fixing developers expressing a color image on a sheet, wherein if a color page is contained in an image forming job, the controller sets the temperature of the fixing unit at the second temperature and starts the image forming job.

Abstract: A more-natural-looking video is reproduced and a video data having a desired color tone is formed by preserving the tone of a video as an original in color conversion at a desired ratio. To this end, a criterion color register stores color information (hue, chroma and density) for determining whether input pixel data is eligible for conversion, a target color register stores color information indicative of a target color, and a preservation degree register stores a preservation degree that determines the degree of preservation in color conversion. A color determination section determines whether the input pixel data is eligible for conversion, and the determination result is output to a color converter section. The color converter section performs color conversion to eligible pixel data according to the information stored in the criterion color register, target color register and preservation degree register, with the result of the color conversion being output.

Abstract: An image outputting apparatus is provided with a reproduction circuit for reproducing moving images from a recording medium by operating a recording-medium transport circuit, a recording circuit for recording on a recording substance an image for one picture included in the moving images by operating a feeding circuit which feeds the recording substance, and a control circuit arranged to control the feeding circuit to feed the recording substance to a predetermined position so as to shift a recording position on the recording substance, while controlling the recording-medium transport circuit to transport the recording medium to a predetermined position, and to control. the recording medium-transport circuit and the recording circuit in an interlocked manner so as to record the image for one picture on the recording substance. The arrangement of these parts in combination permits reduction in capacity of an image memory and also in processing time of the apparatus.

Abstract: It is an object to provide an image processing apparatus which can obtain an image reproduction that accurately corresponds to an original color when an ordinary color original is read and which can obtain an accurate marker edition result when a marker original is read. When a color scanning mode to read the color image is selected, an original ground removal by a prescan is not performed. When a marker edition scanning mode to read the marker original is selected, the original ground removal is executed. Thus, a color reproduction which accurately corresponds to the original is executed in the color scanning mode. In the marker edition scanning mode, the color recognition of the marker color is accurately performed without being influenced by the ground color.

Abstract: An image processing apparatus prevents the misdetermination of a read color and allows correct marker edition. A marker registration circuit reads and register color data marked by a predetermined color marker and a color determination circuit compares the color data registered and the read color data at the reading of the document sheet to determine a color code of the marker color. An area determination circuit determines whether an area being read belongs to a normal area, a line area or a paint area and an output color determination circuit determines a color to be outputted in accordance with the color code and the area being read.

Abstract: An image is recorded by repeating a recording operation which includes a main scanning operation performed by moving a recording head in which recording elements are arrayed in a direction perpendicular to a direction in which the recording elements are arrayed. A vertical scanning operation is performed by moving a recording medium in a direction perpendicular to the horizontal scanning direction through a distance corresponding to a recording width after the horizontal scanning operation is completed. When image data having a width narrower than a maximum recording width of the recording head is recorded, for example when a reduction recording is performed, a number of image data having the narrower width are combined so that image data having the maximum recording width can be recorded in one recording operation using the plurality of recording elements.

Abstract: A printing apparatus capable of printing a mirror image without increasing the apparatus size. Print data for one band image is stored into an image memory 7 in accordance with an address (in an ascending order) generated by an address counter 103. After storing the print data for one scanning by a print head 101 has been completed in the image memory 7, the print data is read out in accordance with an address (in an descending order) generated by an address counter 104 from the image memory 7, and outputted to the print head 101. At this time, since print data which has previously been used for printing is used no longer, the address counter 103 is set to generate an address in the descending order, and storing of the next print data is made in parallel to the printing. When the printing based on the print data in one scanning has been completed, an address counter 106 is set to generate an address in the ascending order for the next image printing.