Sharp Kabushiki Kaisha Corporation

Other

Mita Industrial Co., Ltd.

Fujisawa Pharmaceutical Company, Ltd.

Fujinon Corporation

Toshio Yamanaka

Yoshikazu Harada

Nobuo Manabe

Norio Tomita

Kyosuke Taka

Hideaki Kadowaki

Ayumu Oda

Masashi Hirai

Osamu Fujimoto

Kazuhiro Matsuyama

Yoshinobu Tateishi

Yoshiharu Yoneda

Toshiya Mikita

Yasuji Yamauchi

Mitsuyoshi Terada

Hirokazu Yamauchi

Atsushi Ide

Yasuo Kitabatake

Syoichiro Yoshiura

Tetsuya Ori

Hiroshi Tachiki

Eiichi Kido

Masayuki Kato

Toshiaki Ino

Naoyuki Harada

Yasunori Minakuchi

Hidekazu Sakagami

Mitsuhiro Ohno

Yoshiya Kinoshita

Mitsuru Ohkubo

Takayuki Ohno

Yuji Nakagawa

Masafumi Okumura

Fumie Takahashi

Kyousuke Taka

Kinji Uno

Kuniaki Nakano

Fumio Shimazu

Masaru Tsuji

Junya Masuda

Tadasu Taniguchi

Takayuki Yamanaka

Fumikazu Shimanuki

Takaharu Motoyama

Takashi Kitagawa

Toru Tanjo

Masaru Hatano

Kenzo Yoshida

Masanori Yamada

Manabu Matsumoto

Takahiro Wakikaido

Kouichi Yamauchi

Yasuji Sumida

Koji Katamoto

Masanobu Yamamoto

Yukinori Andou

Hiroyoshi Sakai

Kazuya Kamidaira

Takashi Miyaji

Hiroaki Uchiyama

Takahiko Yoshida

Hiroshi Naka

Yoshikazu Nishikawa

Nobuyuki Hirata

Kazuaki Ishikawa

Yasuji Nakahama

Kaori Fujii

Eiji Kamimura

Ayuma Oda

A transfer unit includes: an intermediate transfer belt that (i) holds a toner image that has been transferred from a photoreceptor drum and (ii) moves a surface holding the toner image; and a secondary transfer belt that comes into contact with the intermediate transfer belt. The transfer unit (i) transfers the toner image from the intermediate transfer belt to a sheet conveyed to the secondary transfer part and (ii) includes a cleaning unit that removes and collects toner from the surface of the intermediate transfer belt. The transfer unit also includes a power source for sequentially applying, to the secondary transfer belt, (i) a first voltage for generating an electric field that transfers normally-charged toner from the secondary transfer belt to the intermediate transfer belt and (ii) a second voltage for generating an electric field that transfers oppositely-charged toner from the secondary transfer belt to the intermediate transfer belt.

Transfer unit, transfer method, and image forming apparatus

In the present applying mechanism, a part of a guide sheetbulges (arches) away from an oil application roller, with respect to a vertical line S passing through the center of a pipe. In other words, in the present applying mechanism, a part of the guide sheethas a shape of avoiding (bypassing) the oil application rollerthat has a high temperature. With this, oil flowing on the guide sheetis kept away from the high-temperature oil application roller. The present applying mechanism can include an edge, or gap, in the guide sheetfor backing-up flow of oil to before the application roller in order to ensure even distribution of the oil to the application roller. The present applying mechanism can include a narrow gap between the pipeand guide sheet

Releasing agent applying mechanism, fixing device, and printing apparatus

A plurality of first base images are formed from a base color output in accordance with a predetermined adjustment value. A plurality of first correction images are formed on the first base images from a correction color to be a subject for correction output in accordance with a predetermined adjustment value. The first correction images are displaced within a predetermined range. The first adjustment value is determined from changed adjustment values. The second base images are formed from the base color output in accordance with the predetermined adjustment value, and the second correction images are formed from the correction color output in accordance with a plurality of adjustment values determined based on the first adjustment value. The second adjustment value having an extreme is determined from a plurality of adjustment value candidates. Finally, the adjustment value for the correction color is corrected to the determined second adjustment value.

Method of correcting adjustment value for image forming apparatus, image forming apparatus, and memory medium

A plurality of first base images for a base color are formed in accordance with a predetermined adjustment value. A plurality of first correction images for a correction color to be a subject for correction are formed on the first base images in accordance with a predetermined adjustment value. The first correction images are displaced within a predetermined range. The first adjustment value is determined from changed adjustment values. The second base images for the base color are formed in accordance with the predetermined adjustment value while the second correction images for the correction color are formed in accordance with a plurality of adjustment values determined based on the first adjustment value. One second adjustment value having an extreme is determined from the plurality of adjustment value candidates. These processes are repeated to determine a final adjustment value. The adjustment value for the correction color is corrected to the determined final adjustment value.

Method of correcting adjustment value for image forming apparatus, image forming apparatus, and recording medium

The present invention includes a first plate () and a second plate () which perform a coarse adjustment of a cylinder mirror () by moving the cylinder mirror () linearly in the substantially vertical and parallel directions with respect to an appropriate plane surface of a reflective surface (RS) of the cylinder mirror (), and the second plate (), a second plate opening section (), a setscrew (), and a hexagon shaft () which perform a fine adjustment in the position of the cylinder mirror () by moving linearly only in the substantially parallel direction after the coarse adjustment has been completed.

Optical scanning arrangement and image forming device with the arrangement

A developer storage device includes a storage container which supplies developer to a developing unit when rotated, and a collecting container for storing developer collected from an image forming section. The developer storage device further includes a first attaching and detaching portion allowing the storage container to be attached to and detached from a developer storage device body, and a second attaching and detaching portion allowing the collecting container to be attached to and detached from the developer storage device body.

Developer storage device and image forming apparatus

A protecting cover and a pickup device, each having a hooking portion, are rotatably provided at the flank of an image forming apparatus. The rotational centers of the protecting cover and the pickup device and the hooking portions are arranged in such geometry that the hooking portions become engaged with each other only in the range from a predetermined trace intersection to the flank of the image forming apparatus when the protecting cover is rotated from its usage position toward its retracted position at the flank of the image forming apparatus. The pickup device is stopped at the starting position of engagement where the hooking portions are positioned at the trace intersection when sheet feed is not made, and is moved to the operating position when sheet feed is to be made. The protecting cover is constructed so as to rotate in linkage with the rotation of a paper feed tray which is rotatably provided at the flank of the image forming apparatus.

Sheet feeder and image forming apparatus having the same

An image forming apparatus transfers a toner image formed on a photoconductor drum onto a sheet-like recording member while the sheet-like recording member is transported and attracted to a transfer belt, and comprises a jam handling control unit for detecting a transport fault of the sheet-like recording member, and for stopping the transport operation when the transport fault is detected. When the transport fault is detected in a section other than a fixing section, the jam handling control unit first causes the transport operation of the fixing section, and thereafter causes the transfer belt and the transport operation on the upstream side thereof to stop, and any sheet-like recording member remaining on the transfer belt so that the transport mechanism on the upstream side thereof is transported and stopped at the position spanning between the area of the fixing section and the area of the transfer belt.

Image forming apparatus

An image adjustment method for an image forming apparatus in which an adjustment image is formed by transferring a plurality of reference images formed by a color component to be the reference among a plurality of color components and a plurality of images to be adjusted, which are formed by other color component to be adjusted, onto a transfer medium so that the images to be adjusted are superposed on the reference images, the density of the formed adjustment image is detected, and an image forming position of the other color component to be adjusted is adjusted based on the detected density of the adjustment image. The density of the surface of the transfer medium is detected, and the position of forming the image to be adjusted is adjusted, based on the detected density of the surface of the transfer medium and the detected density of the adjustment image.

Image adjustment method and image forming apparatus

Images based on each of a plurality of color components are formed; the formed images are transferred on each transfer medium to form an image quality determining image; the image quality of the image quality determining image is determined on the basis of the detected density thereof, an adjustment image is formed by overlaying and transferring an image of other color component to be adjusted to the reference image of the reference color image out of the plurality of color components, on the transfer medium; the density of the adjustment image is detected; and the image forming position of the other color component to be adjusted is adjusted on the basis of the detected density. At the time of executing the color matching adjustment process for detecting the overlaid state of color component images, it is determined whether a specified time has passed or not since the previous adjustment process, a specified number of images are formed or not, environments are changed or not, and the power source is turned on or off or not. When it is predicted that the quality of the formed image is out of an appropriate range, a quality checking image is formed, its image quality is checked, and the color matching adjustment process is executed only when it is within an appropriate range.

Image adjusting method and image forming apparatus

An average concentration value is detected within a measurement area (about 10 dots) corresponding to the pitch of a detection pattern in the total color matching adjustment range (100 dots), and from a value detected as a local maximum value, a candidate for correction value for the exposure timing of an adjustment image is acquired within the color matching adjustment range. This process is carried out for two types of detection patterns having different pitches thereby to acquire two candidates. A correction value for the exposure timing is determined from a candidate shared by the two detection patterns. At the time of color matching adjustment, the wasteful consumption of the developer or the like is suppressed, while carrying out the color matching adjustment efficiently within a short time.

Image adjusting method, image forming apparatus and memory product

The delivered sheet stacking tray has a delivered sheet stacking surface, provided on an upside of an image forming section, which extends in a sheet-transporting direction so that a transporting-direction end of the delivered sheet stacking surface is opened toward a lateral outside of the image forming device body, wherein the delivered sheet stacking surface has a sheet removing concave which extends from (a) the transporting-direction end via (b) a stacking area of a maximum size sheet to (c) a stacking area of a minimum size sheet so that the sheet removing concave is positioned within an area ranging from the stacking area of the maximum size sheet to the stacking area of the minimum size sheet, and the sheet removing concave is formed substantially in parallel to a line linking (i) a corner portion of the stacking area of the maximum size sheet which corner portion is positioned on a downstream side in the transporting direction and on a front side of the image forming device to (ii) a corner portion of the stacking area of the minimum size sheet which corner portion is positioned on the downstream side in the transporting direction and on the front side of the image forming device, thereby realizing a preferable stacking condition of sheets on the delivered sheet stacking surface, and making it easy to remove the sheets.

Delivered sheet stacking tray and image forming device having the same

An image forming apparatus is provided with a photoreceptor drum which includes a cylindrical drum whose surface is coated with a photosensitive layer, and a rear-side drum flange section; and a developer. A coupling section at which the photoreceptor drum is attached to or detached from an image forming apparatus main body includes an input section and an apparatus output section. The input section is includes an internal gear having teeth of an involute curve formed in an inner surface of the rear-side flange section and receives rotation driving force from the image forming apparatus main body. The apparatus output section is composed of an external gear having teeth in the same shape and in the number as the internal gear, and outputs the rotation driving force from the image forming apparatus main body to the input section.

Photoreceptor drum and image forming apparatus

A junction/disjunction unit of a multicolored image forming apparatus joints/disjoints a transfer material holder with/from an image holder, to switch over between a monochromatic image forming mode which uses a specific image forming unit and a multicolored image forming mode which uses a plurality of image forming units. For switching the image forming mode, a driving unit for driving the junction/disjunction unit also drives an auger provided for conveying toner, which has been recovered by a transfer material holder cleaning unit for recovering toner remaining on the transfer material holder, into a recovery container. Accordingly, a driving force outputted from the driving unit can be effectively utilized, and thereby good cost performance can be realized.

Multicolored image forming apparatus for forming multicolored and monochromatic images

Each of a plurality of combined images is formed separately for each image carrier with respect to a length related to the circumference length (Dp&#xd7;&#x3c0;) of the image carrier. There is provided a combined-image adjusting section for forming a combined image so that a density detecting section detects the density of the combined image at plural and substantially equal pitches within a range of at least one circumference length (Dp&#xd7;&#x3c0;) of the image carrier, or so that the density detecting section detects the density average value of the combined image at plural and substantially equal pitches within a range of at least one circumference length (Dp&#xd7;&#x3c0;) of the image carrier.

Image forming apparatus and color superimposition adjustment method of image forming apparatus

Growing community of inventors

Yao, Japan

Toshio Yamanaka