93results about "Electrographic processes using charge pattern" patented technology

An image forming apparatus (1) includes: a first image forming portion (10S) configured to form a brilliant developer image with a brilliant developer; a second image forming portion including at least one image forming portion (10K, 10C, 10M, 10Y) configured to form a developer image with at least one non-brilliant developer; and a controller (3) configured to control operation of the first image forming portion and the second image forming portion in accordance with received print data. When the controller causes the brilliant developer image (IS) to be formed on a medium in accordance with the print data by the first image forming portion, the controller causes a black developer image (IB) to be formed between the brilliant developer image and the medium by the second image forming portion.

An image forming apparatus includes: a first image forming unit including a plurality of first image forming sections and a first intermediate transfer body to which a toner image formed by the plurality of first image forming sections is transferred at a time; a second image forming unit that is provided downstream of the first image forming unit in a sheet conveyance direction, and that has a plurality of second image forming sections and a second intermediate transfer body to which the toner images formed by the plurality of second image forming sections are transferred at a time; a first secondary transfer section that is provided corresponding to the first image forming unit and that secondarily transfers the toner image formed on the first intermediate transfer body onto a sheet conveyed on a sheet conveyance path; a second secondary transfer section that is provided corresponding to the second image forming unit and that secondarily transfers the toner image formed on the second intermediate transfer body onto a sheet conveyed on a sheet conveyance path; and a sheet position adjusting roller that conveys the supplied sheet at a predetermined timing to a first secondary transfer position at which the sheet is secondarily transferred by the first secondary transfer section. The distance between the sheet position adjustment roller and a second secondary transfer position at which secondary transfer is performed by the second secondary transfer section is longer than the maximum sheet length, which is the length of the sheet having the largest sheet size in the conveyance direction, among the sheets that are likely to be used.

To suppress partial positional deviation within a single sheet between images formed by two image forming units. When aligning the position of an image printed on paper PP by image forming unit 30 with the position of an image printed on paper PP by image forming unit 50, CPU 81, which is a processor, causes one image forming unit selected from the four image forming units of image forming unit 30 and one image forming unit selected from the four image forming units of image forming unit 50 to form images at the same position on the paper. Then, CPU 81 reduces the amount of misalignment by partially changing the image write cycle of either image forming unit 30 or image forming unit 50 depending on the amount of relative misalignment between the two formed images.

An image forming apparatus includes an image carrier; a developing device that applies a developer to the image carrier; and a supplying device that supplies a developer to the developing device, the supplying device having a developer flow path along which a developer that moves toward the developing device passes, the supplying device being configured such that a gas that has flowed from the developing device to the supplying device passes along the developer flow path toward an upstream side in a movement direction of a developer.

An image forming apparatus includes: a first image forming unit that includes plural first image forming sections and a first intermediate transfer member on which a toner image formed by the plural first image forming sections is primarily transferred; a second image forming unit that is provided on a downstream side of the first image forming unit in a paper transport direction and includes plural second image forming sections and a second intermediate transfer member on which a toner image formed by the plural second image forming sections is primarily transferred; a first secondary transfer section that is provided corresponding to the first image forming unit and secondarily transfers the toner image formed on the first intermediate transfer member onto paper transported on a paper transport path; a second secondary transfer section that is provided corresponding to the second image forming unit and secondarily transfers the toner image formed on the second intermediate transfer member onto paper transported on a paper transport path; and a paper position adjusting roll that transports fed paper, at a predetermined timing, to a first secondary transfer position at which the first secondary transfer section performs secondary transfer, in which a distance between the paper position adjusting roll and a second secondary transfer position at which the second secondary transfer section performs the secondary transfer is longer than a maximum paper length that is a transport-direction length of paper having a largest paper size among sheets of paper having a probability of being used.

An image forming apparatus includes: a first image forming unit that includes plural first image forming sections and a first intermediate transfer member on which a toner image formed by the plural first image forming sections is primarily transferred; a second image forming unit that is provided on a downstream side of the first image forming unit in a paper transport direction and includes plural second image forming sections and a second intermediate transfer member on which a toner image formed by the plural second image forming sections is primarily transferred; a first secondary transfer section that is provided corresponding to the first image forming unit and secondarily transfers the toner image formed on the first intermediate transfer member onto paper transported on a paper transport path; a second secondary transfer section that is provided corresponding to the second image forming unit and secondarily transfers the toner image formed on the second intermediate transfer member onto paper transported on a paper transport path; and a paper position adjusting roll that transports fed paper, at a predetermined timing, to a first secondary transfer position at which the first secondary transfer section performs secondary transfer, in which a distance between the paper position adjusting roll and a second secondary transfer position at which the second secondary transfer section performs the secondary transfer is longer than a maximum paper length that is a transport-direction length of paper having a largest paper size among sheets of paper having a probability of being used.

An image forming apparatus includes an image carrier; a developing device that applies a developer to the image carrier; and a supplying device that supplies a developer to the developing device, the supplying device having a developer flow path along which a developer that moves toward the developing device passes, the supplying device being configured such that a gas that has flowed from the developing device to the supplying device passes along the developer flow path toward an upstream side in a movement direction of a developer.

An image forming apparatus includes: plural image forming units, each including plural image forming sections and an intermediate transfer member on which a toner image formed by the plural image forming sections is primarily transferred; a transport belt that is capable of transporting a recording medium on which a toner image of the intermediate transfer member of each of the plural image forming units is secondarily transferred and that is capable of secondarily transferring the toner image of the intermediate transfer member of each of the plural image forming units; a first detection section that detects the toner image on a downstream side of a most downstream secondary transfer position; a recording medium supply section that supplies the recording medium to the transport belt; and a processor configured to: cause the first detection section to detect a toner image secondarily transferred to the transport belt in a state where the recording medium is transported by the transport belt.