Konica Corporation

Konishiroku Photo Industry Co., Ltd.

Konica Corporatoin

Masakazu Fukuchi

Satoshi Haneda

Shizuo Morita

Tadayoshi Ikeda

Shunji Matsuo

Hisao Satoh

Kunio Shigeta

Tadashi Miwa

Hisashi Shoji

Kiyoshi Kimura

Yotaro Sato

Akitoshi Matsubara

Kunio Ito

Noriyoshi Tarumi

Masahiko Itaya

Yukio Okamoto

Hiroyuki Nomori

Hisayoshi Nagase

Hiroyuki Tokimatsu

Shuta Hamada

Kunihisa Yoshino

Seiko Naganuma

Hiroshi Ishii

Shizuo Kayano

Masato Ueda

Keiji Oishi

Yoshimi Mizoguchi

Makoto Takeda

Sachie Hosokoezawa

Hiroyuki Yamamoto

Hiroshi Fuma

Toshihide Miura

Susumu Okui

Yoshiyuki Ichihara

Kazuyoshi Kimura

Kazuo Yasuda

Fumiaki Hiraike

Masahiro Shigetomi

Naoto Tokutake

Kazushi Hayakawa

Noboru Hatakeyama

Susumu Tashiro

Masayuki Kamegamori

Motozi Kawamoto

Kosuke Minoshima

Yoshinori Abe

Toru Matsumoto

Meizo Shirose

Hiroshi Tokunaga

Masahiko Matsunawa

Takao Kurohata

Hiroyuki Maruyama

Toshiro Fujimori

Yasuhiko Tanaka

Akihiko Tamura

Yoshio Yamazaki

Nin-ichi Kamogawa

Toshinori Yamazaki

Kiyoaki Kawamoto

Tetsuko Omoto

Jun-ichi Hamada

Kenji Taki

Tsugio Sugizaki

Yasuhiko Yamaguchi

Yasuyuki Iwai

Hideo Satoh

Sachie Hosogoezawa

Hiroshi Niki

Sizuo Morita

Tadashi Umezawa

Yoshiaki Kobayahi

Masashi Akamatsu

Hiseo Satoh

Kiyoshi Akazawa

Satoshi Heneda

Seiko Nagamuma

Shisuo Morita

Tadayashi Ikeda

A color image forming apparatus is provided wherein toner images formed on a plurality of image carriers are primarily transferred onto an intermediate transfer object, and then, are secondarily transferred onto a recording sheet. The color image-forming apparatus includes an intermediate transfer member, a longitudinal direction of which is arranged in substantially a vertical direction, and onto which toner images formed on image carriers are sequentially transferred in such a manner that the toner images overlap relative to each other so as to form a color toner image on the intermediate transfer member. In addition, a transferring device is provided to transfer the color toner image formed on the intermediate transfer member onto a transfer sheet. The intermediate transfer member and the image carriers are integrated into a rack, and the rack is drawable in substantially a horizontal direction with respect to a mainframe of the color image-forming apparatus.

Color image forming apparatus

The present invention concerns a color image forming apparatus wherein toner images formed on a plurality of image carriers are primarily transferred onto an intermediate transfer object, and then, are secondarily transferred onto a recording sheet. The color image-forming apparatus includes a plurality of image carriers; a plurality of latent image forming devices to form electrostatic latent images on the image carriers; a plurality of developing devices to develop the electrostatic latent images with toner to form visible toner images on the image carriers; an intermediate transfer member, a longitudinal direction of which is arranged at substantially a vertical direction, and onto which the toner images formed on the image carriers are sequentially transferred in such a manner that the toner images overlap relative to each other so as to form a color toner image on the intermediate transfer member; and a transferring device to transfer the color toner image formed on the intermediate transfer member onto a transfer sheet. The intermediate transfer member and the image carriers are integrated into a rack, and the rack is drawable in substantially a horizontal direction in respect to a mainframe of the color image-forming apparatus.

Color image forming apparatus with rack having detachable units

An image forming apparatus includes a reversing unit for reversing a two-sided document and placing the document on a platen, a reading unit for reading image data of either a front or back side of the document placed on the platen by the reversing unit, and at least one of: (i) a first detecting/setting unit for providing first information representing a position on which a binding margin of the document is located and a direction in which a top or bottom portion of the document is directed, and (ii) a second detecting/setting unit for providing second information representing a position on which a binding margin of an image to be printed is located and a direction in which a top or bottom portion of the image to be printed is directed. An image converting unit is provided for converting the read image data into output image data according to at least one of: (i) the first information with respect to the position of the binding margin of the document and the direction of the document, and (ii) the second information with respect to the position of the binding margin of the image to be printed and the direction of the image to be printed. And a writing unit is provided for printing the image to be printed according to the output image data.

Image forming apparatus for printing images in accordance with at least

An apparatus for forming images on at least one surface of a sheet includes a reader for reading image information on documents, a memory for storing image signals output by the reader, and an image forming unit for selectively forming one of: (i) two page toner images corresponding to the image signals of two pages of the documents separately on two image carrying members, and (ii) a single toner image on one of the two image carrying members. A jam detector detects a jammed sheet, and a delivery detector detects delivery of a copied sheet to outside the apparatus. Image signals are eliminated from memory in accordance with a progression of image formation. If the jam detector detects the occurrence of the jammed sheet, a control unit prohibits the memory from eliminating the image signals until the delivery detector detects a next sheet delivered from the apparatus, so that the selected image expected to be formed by the image forming unit on the jammed sheet may be properly formed on a following sheet based on the image signals retained in the memory. A selector is provided for selecting one of a both-surface copy mode and a single-surface copy mode, wherein the control unit controls the memory to store the image signals corresponding to two pages of the documents when the both-surface copy mode is selected and to store the image signals corresponding to the single page of the documents when the single-surface copy mode is selected.

Image forming apparatus and method for efficiently forming images even

An image forming apparatus includes a first image carrier on which a toner image forming device forms a toner image; a second image carrier provided opposite to the first image carrier, onto which the toner image on the first image carrier is transferred; first and second transfer devices for transferring the toner image on the first and second image carriers onto one side and the other side of a transfer material, respectively; and a fixing device for fixing the toner images on both sides of the transfer material transferred respectively by the first and second transfer devices. The fixing device includes first and second fixing members provided opposite to one side and the other side of the transfer material, respectively, wherein the transfer material passes between the first and second fixing members, and first and second sensors are provided for detecting temperature of the first and second fixing members respectively. The apparatus further includes a control device for controlling the toner image forming device, the first and second transfer devices, and the fixing device. The control device enables image formation on both sides of the transfer material or on one side of the transfer material, and prohibits image formation on at least both sides of the transfer material when the temperature detected by the first sensor is appropriate for the first fixing member, and the temperature detected by the second sensor is not appropriate for the second fixing member.

Image forming apparatus

An image forming apparatus for forming images corresponding to image data of plural pages. The apparatus includes: a photoreceptor; a toner image former for forming a toner image on the photoreceptor in correspondence with the image data; a toner image receiving body for receiving the toner image from the toner image former and for carrying the toner image; the first transfer means for transferring the toner image on the photoreceptor onto one side surface of a transfer sheet; the second transfer means for transferring the toner image on the toner image receiving body onto the other side surface of the transfer sheet; a fixer for fixing the toner image, being transferred onto the transfer sheet, on the transfer sheet; a discharger, having plural discharging modes, for discharging the transfer sheet; and a control means for controlling the toner image former; wherein the control means arranges a combination of a first toner image formation onto the transfer sheet, being performed with the photoreceptor and the first transfer means, and second toner image formation onto the transfer sheet, being performed with the toner image receiving body and the second transfer means, in response to a given order of pages in the image data or to a discharging mode, selected from the discharging modes, of the discharger.

Image forming apparatus with two transfer means

An apparatus for forming an image on a sheet member includes a photoreceptor drum on which a first toner image and a second toner image are separately formed; an image carrying belt on which the second toner image is transferred from the photoreceptor drum; a first transfer device to transfer the first toner image from the photoreceptor drum to a first side of the sheet member; a second transfer device to transfer the second toner image from the image carrying belt to the other side of the sheet member; and a cleaner capable of being brought in contact with anal separated from the image carrying belt. The cleaner is brought in contact with the image carrying belt after the first toner image is transferred from the photoreceptor drum to the first side of the sheet member.

Image forming apparatus including a mechanism for eliminating mechanical

In an image forming apparatus provided with a photoreceptor on which a obverse toner image is formed, a toner image receiving body on which a reverse toner image is transferred from the photoreceptor, and transfer devices to transfer the obverse image onto one side of a sheet and to transfer the reverse image onto the other side of the sheet. An image forming condition for the reverse image is changed to be different from that for the obverse image.

Image forming apparatus for double-sided image formation with properly

An image forming apparatus has a photoreceptor drum and a toner image receptor for forming toner images on both sides of a transfer sheet. The apparatus includes a photoreceptor drum; a toner image forming unit for forming a toner image on the photoreceptor drum; a toner image receptor, disposed facing the photoreceptor drum, for holding the toner image; a first transfer unit for transferring the toner image, on the photoreceptor drum, to one side surface of a transfer sheet; a second transfer unit for transferring the toner image, on the toner image receptor, to the other side surface of the transfer sheet; a fixing unit for fixing the toner image transferred to both side surfaces of the transfer sheet; an image size discriminator for discriminating a size of an image to be formed by the image forming apparatus, and for generating a signal corresponding to the discriminated size; and a control unit for controlling the image forming apparatus so that either the toner image corresponding to one page is formed on the toner image receptor or the toner image corresponding to plural pages is formed on the toner image receptor according to the signal generated by the image size discriminator.

Duplex image forming apparatus with two image carriers and an image size

An optical system assembling method in an image forming apparatus in which there are provided an image forming body around which a plurality of exposure device each having a linear exposure optical system to imagewise expose on the image forming body, and a plurality of developing device containing respective color toners different from each other which are superimposed on the image forming body to form a color toner image, the method further having the steps of: lighting the exposure optical system; forming an image emitted from the exposure optical system on a sensor which is disposed at a position corresponding to a photosensitive surface of the image forming body with respect to the exposure optical system; adjusting a position of the exposure optical system on the basis of a result of the image forming so that a focal point of the exposure optical system is coincident with a surface of the sensor; and fixing at the adjusted position the exposure optical system to an optical system supporting body provided on a main body of the apparatus.

Optical system assembling device for an image forming apparatus

An image forming apparatus includes: a photoreceptor drum; a charger for charging an outer surface of the photoreceptor drum; image exposure devices each for exposing the photoreceptor drum to form a latent image thereon, wherein the image exposure devices are provided inside the photoreceptor drum, and are detachably mountable with the photoreceptor drum to the image forming apparatus; a developing device for developing the latent image to form a toner image on the outer surface of the photoreceptor drum; and a supporting member on which the image exposure devices are mounted, wherein the supporting member and the photoreceptor drum are connected through bearing members on both ends of the photoreceptor drum, and the supporting member has an engaging portion for engaging with a part of the image forming apparatus to fix the image exposure devices through the supporting member, while the photoreceptor drum is rotated around the image exposure devices through the bearing members.

Electrophotographic color image forming apparatus with image exposure

A color image forming apparatus wherein an image forming body has a inner surface and a outer surface, a charging device electrically charges the outer surface, and an exposure device imagewise exposes the inner surface. A developing device is used to form a first toner image on the outer surface. A unit is detachablly mounted in a housing of the apparatus, wherein the image forming body and a plurality of the exposure devices are provided in the unit.

An image forming apparatus for forming an image on an image forming body by scanning a plurality of modulated laser beams is disclosed. The apparatus is provided with a generator to generate a plurality of reference signals each with a differrent phase from other reference signals, a detector for detecting the difference of image density between two adjacent image pixels, combined modulator to generate a modulated laser beam by combining a selected laser beam, a selected reference signal and the image density. The detector classifies each pixel as one of an edge starting pixel, an edge ending pixel, and a non-edge pixel based on the value of image density difference relative to positive and negative threshold values. The selection of the laser beam and the reference signal is based on the image density difference detected by the detector and the class of the pixel.

Image forming apparatus with edge point detector based on image density

A color image forming apparatus provided with plural charging devices, plural image exposure devices, and plural developing devices which are arranged around the outer circumference of a photoreceptor so that a color image is formed during a single rotation of the photoreceptor. The apparatus comprises a supporting cylinder for enclosing the photoreceptor and for supporting the plural image exposure devices thereon.

Electrophotographic color image forming apparatus with a plurality of

In an apparatus in which a yellow, magenta, and cyan toner images are superimposed on a photoreceptor drum made of a transparent material, an image exposure device is provided in the photoreceptor drum and emits exposure lights whose wavelength has a spectral reflective ratio lower than 30% for at least two of yellow, magenta, and cyan toners. The image forming processes is controlled so that a toner image for which the exposure lights have a spectral reflective ratio larger than 30% is formed after toner images for which the exposure lights have a spectral reflective ratio lower than 30% have been formed.

Electrophotographic color image forming apparatus

Growing community of inventors

Hachioji, Japan

Masakazu Fukuchi