Ricoh Company, Ltd.

Fuji Xerox Co., Ltd.

Kabushiki Kaisha Toshiba

Nobuo Inoue

Tsutomu Kimura

Shintaro Adachi

Minoru Sodeura

Toshiyuki Yamada

Yasuharu Gaman

Katsuhiko Miki

Masaru Yamagishi

Kouki Sakamoto

Nobuyuki Shimodaira

Takashi Koshinuma

Yoshihisa Hattori

An image processing apparatus includes a plurality of compression units and a switching unit. The plurality of compression units compress image information by different compression methods. The switching unit extracts plural pieces of color information from pieces of color information which constitute the image information in a color space expressing the image information, and selects one of the plurality of compression units in accordance with hue angles of the plural pieces of extracted color information.

Image processing apparatus, image processing method and computer-readable medium

A sheet transport device and an image forming apparatus that includes the sheet transport device. The sheet transport device includes a reverse-transport roller, at least one roller guide, and a shaft. The reverse-transport roller is provided to a diverging point of a sheet reversing portion from which a recording medium enters or exits and is configured to transport the recording medium to the sheet reversing portion. At least one roller guide is provided in a vicinity of an end face of at least one side of the reverse-transport roller and is configured to prevent the reverse-transport roller from contacting the recording medium when reversing the recording medium. The reverse-transport roller and the roller guide are disposed on the shaft. Friction of a peripheral surface of the roller guide is configured to be substantially less than that of the recording medium.

Sheet transport device and image forming apparatus including same

An image processing apparatus includes: a limited color conversion processing section that extracts a plurality of pieces of color information making up image information and executes conversion to specific colors to which the color information belongs; a by-color separation processing section that separates for each specific color, image information converted into the specific colors by the limited color conversion processing section; a compression processing section that compresses for each color, the image information for each specific color separated by the by-color separation processing section; and a layered structure forming processing section that collectively outputs the image information for each color compressed by the compression processing section.

Image processing apparatus, image processing method and computer readable medium with compression processing for each color

An image processing apparatus is provided, the image processing apparatus including: a limited color conversion processing section that extracts plural pieces of color information constructing image information and converts the plural pieces of color information into color information representing specific colors to which each of the plural pieces of color information belongs; a by-color separation processing section that separates the image information containing the converted color information for each of the specific colors; a compression determination section that determines a compression system for each color as to each of pieces of image information which are separated by the by-color separation processing section for each of the specific colors; a compression processing section that compresses said each of pieces of image information according to the determined compression system for each color; and a layered structure forming processing section that collectively outputs said each of pieces of image information compressed.

Image processing apparatus and computer readable medium

A document managing system includes: an image forming device that includes an image forming part, and forms a document on a prescribed output medium; a discarding device that includes a document discarding part that discards the document formed on the output medium by the image forming device; and a discard certificate issuing device that includes a discard certificate issuing part, and issues a certificate of a discarding process in the discarding device.

Document managing system, image forming device, discarding device, discard certificate issuing device, document attribute managing device, and computer readable medium

A sheet conveying apparatus that conveys a sheet serving as a recording medium and effectively reduces energy consumption includes a movable sheet supporting device configured to support sheets, a sheet size detecting device configured to detect a size of the sheets by detecting a location of the sheet supporting device, a gap detecting device configured to detect a gap between the sheets and the sheet supporting device, and a reporting device configured to notify an operator of a gap detected by the gap detecting device.

Sheet conveying apparatus and image forming apparatus

A medium discrimination device includes a transmitted light quantity measurement device arranged to measure a transmitted light quantity in a thickness direction of a printing medium on a conveyance route, and configured to perform a measurement of the transmitted light quantity at each time the printing medium is conveyed, a measurement value memory device storing a result of the measurement performed by the transmitted light quantity measurement device, a medium setting device configured to previously set a type of printing medium to be used, a medium information memory device storing information of a transmitted light quantity assigned to each printing medium to be set by the medium setting device, and a control processing unit configured to perform paper type detection on a first printing medium, and double feed detection on following printing mediums.

Medium discrimination device, image forming apparatus, and program having simplified mechanism

A sheet carrier apparatus includes a sheet carrier guide to guide a sheet in a first direction and includes an opening; and a paper-dust removal member that is arranged substantially above the opening and so as to make a contact with the sheet carried on the sheet carrier guide, is extending in a second direction orthogonal to the first direction, and removes paper dust so that the paper dust falls through the opening. In the sheet carrier apparatus, the paper-dust removal member includes a first part and a second part that are arranged along the second direction, and the first part and the second part have a different contact resistance against the sheet.

Sheet carrier apparatus, image forming apparatus, image reader, and post-processing apparatus

A sheet conveying unit that guides and conveys a sheet material by a lower conveying guide includes an opening in the lower conveying guide, a brush-like member on a downstream side of the opening to scrap off paper dust adhered on a surface of a sheet material. A sheet detecting unit controls operation of the brush-like member.

Sheet conveying unit, and image reading unit, post-processing unit, and image forming apparatus employing the sheet conveying unit

A sheet conveying unit includes a lower sheet conveying guide on which a sheet material is placed. The sheet conveying unit conveys the sheet material while the sheet material is being guided by the lower sheet conveying guide. The lower sheet conveying guide includes an opening. An elastic member projecting from above toward the lower sheet conveying guide is provided at a downstream side of the opening.

An apparatus for transferring paper sheets includes a supply device which supplies sheets, a supply unit which is provided as part of the supply device and forms a supply outlet through which the sheets are ejected, a receiving device which is connected to the supply device in such a manner as to be vertically movable relative to the supply device, and a receiving unit which is provided as part of the receiving device and forms a receiving inlet by which the sheets are received, wherein one of the supply unit and the receiving unit is configured to be vertically movable, and changes a vertical position thereof in response to relative positional relationship between the supply device and the receiving device.

Apparatus for transferring paper sheets

An image forming apparatus has a plurality of parallel mounted sheet conveying paths including at least two guide plates swingable between a sheet guiding position in which the plates guide a sheet, and a jammed sheet removing position in which the sheet conveying path is opened. The image forming apparatus further includes an opening and shutting mechanism for moving the swingable guide plates between the sheet guiding position and the jammed sheet removing position.

Image forming apparatus having releasable sheet conveying paths and

An image forming apparatus includes a reversing unit which reverses and feeds recording material fed from a fixing device, and a guiding device including first and second guide members facing each other to form a part of a first conveying path in which a recording material with a toner image fixed thereto is conveyed to the reversing unit from the fixing device. The second guide member forms, in cooperation with a third guide member, a part of a second conveying path in which the recording material is conveyed to an outside of the main body of the image forming apparatus. The first and second guide members are movable between a sheet guide position in which the first and second guide members guide the recording material along the first and second conveying paths, and a sheet jam removing position in which each of the first and second conveying paths is opened for removal of a jammed sheet. A feeding device feeds the recording material fed from the fixing device through the first and second conveying paths, respectively, and a displacement device displaces the first and second guide members to the sheet guide position or the sheet jam removing position in cooperation with the reversing unit.

Image forming apparatus having sheet guide members openable for removing

An image processing system has a density conversion table memory and a color conversion table memory. The density conversion table memory is addressed by first density pixel data of R, G and B components read out from an image memory, and generates second density pixel data predetermined as representative density pixel data of the first density pixel data. The color conversion table memory is addressed by the second density pixel data from the density conversion table memory, and generates color density pixel data, prepared in advance for color display, corresponding to the second density pixel data. The color density pixel data from the color conversion table memory is written in the image memory. When image display is preformed by utilizing the contents of the image memory, a color arrangement of a display image, different from that of the original image displayed by the first density image data, can be obtained.

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Tokyo, Japan

Nobuo Inoue