Ricoh Company, Ltd.

Kazushige Taguchi

Kazunori Bannai

Hiroshi Takahashi

Tetsuya Fujioka

Yoshihiro Sakai

Hideya Furuta

Susumu Shiina

Yutaka Hasegawa

Fumio Kishi

Mitsuru Mamizuka

Tsutomu Shouji

Noriyuki Kimura

Kenichi Mizuma

Yutaka Koizumi

Nobuo Kasahara

Katsuo Sakai

Yasunori Kawaishi

Tatsuo Hirono

Makoto Ohsaki

Shinju Nagatsuna

There is provided by the present invention an image forming apparatus including a one-chip microcomputer having white reference data for a first sheet of copy fetched with shading gate arrays in a stable region for a halogen lamp, using said white reference data when forming an image for a first sheet of copy, and also having shading-corrected white data fetched for a second or subsequent sheet of copy each time an image is formed.

Image forming apparatus

An image forming apparatus is disclosed for providing accurate shading corrections. The apparatus includes an illumination source for illuminating an image, and a photoelectric converter that receives reflected light from the image and photoelectrically converting the reflected light. The output signal from the photoelectric converter is amplified and converted to a digital signal. The digital signal is then subjected to shading correction. A controller is provided for ensuring that white reference data for a first sheet of copy is fetched from a stable region of the illumination source during shading correction. The white reference data is subsequently used when forming an image for a first sheet of copy.

A method for turning over a page of a book-type original using a belt as a device for turning over the page. The original is set with spread pages arranged upward. The method includes the steps of disposing the belt over spread pages of the original so that the belt comes in contact with a surface of the spread pages, attracting one of the spread pages of the original to the belt by an attracting devices, and deforming a part of the belt upward at a portion of the belt continuously along the surface of the spread pages while moving the portion from one end of the page to the other end thereof so that the page attracted to the belt is separated from a next page of the original.

Method and apparatus for turning over pages of book-original

The image forming apparatus according to the present invention comprises an operating unit for displaying a mode setting screen for obtaining a desired image and inputting a processing mode by means of selecting one of the keys, a system control unit for executing a control processing according to the processing mode inputted from the operating unit, an image processing unit for executing a specified image processing to the image data according to a control signal from the system control unit, and an image display unit for switchably displaying image data prior to and after processing outputted from the image processing unit.

Image forming apparatus with display device for displaying before and

An image reading device capable of preventing, by increasing the quantity of light at the center or bound portion of a spread book document, the quantity of light from becoming short and preventing density from becoming irregular due to the deviation of a focus. At and around the center of a spread book document where the document is bound, the quantity of light for illumination or the amplification gain of image data read from the document is increased. A plurality of fluorescent lamps illuminate the surface of the document at the upstream side and downstream side with respect to an intended scanning direction. When the edge of the document is to be detected, only one of the lamps is turned on to enhance the stripe pattern representative of the stepped edge portion of the document.

Book document reading device

An image forming apparatus has an image scanner, a sensor for determining that the image sensor has scanned the front edge of a document, and a controller using main scanning line synchronizing signals and an output signal of the sensor as reference signals. In response to the reference signals, the controller causes at least a writing unit to start writing each image data of particular color and causes a transfer medium driving circuit to start driving a transfer medium. The apparatus allows image components of different colors to be transferred to the transfer medium one above the other in accurate registration.

Image forming apparatus using a synchronized transfer medium driver

In a color image forming apparatus, an electrostatic latent image based on image data is formed onto a photosensitive body. A toner image of the electrostatic latent image is transferred to an intermediate transfer belt. Final toner images are transferred to a transfer material together. Plural original images are synthesized and written onto the intermediate transfer belt by an image processing unit and a writing unit. A process of this image synthesis is displayed in a display of a display editor. The image processing unit and a main control panel write the synthesized images in accordance with a synthetic condition. The toner images finally formed on the intermediate transfer belt are transferred to the transfer material together. Accordingly, the images can be synthesized accurately and the color image forming apparatus can be simply constructed and can be cheaply manufactured. Color image forming methods are also shown.

Color image forming apparatus and method

Shading correcting means for image forming apparatus

An image reading device has two different modes for controlling the switchover of a motor drive pattern. Either one of the two modes is selected in accordance with various drive conditions including a drive speed. In one mode, in response to every drive pattern switching pulse, pattern data are output by software processing while a position signal is referenced. In the other mode, a macro transfer function is used to output the pattern data by DMA (Direct Memory Access) while the position signal is referenced at every repetition cycle of the drive patterns. The device is capable of reading an image at high speed by switching the drive pattern rapidly, thereby obviating irregularity in a reference position for reading an image.

Image reading device for scanning a document in first and second modes

An image reader capable of determining whether or not a book document to be copied needs royalty by the recognition of a book document and counting operation of a copying system. When a book document to be copied needs royalty, the number of times that images of the document are scanned or the number of times that the resulting image data are outputted is counted. While the count is stored, the royalty of the book document copied is managed on the basis of the count. The image reader can also read a ID code formed on the book, and can control the counting operation based on the detected book ID.

Royalty accounting system for a book copier

A miniature and reliable device capable of reading a book document while turning the pages thereof. A book document is laid on a document table in a spread position face up. The document table is pressed upward while a scanning unit is restricted in movement in the up-and-down direction. The scanning unit, therefore, receives the surface of the book document pressed upward.

Book document reading device having a page turning capability

In an image forming apparatus capable of reading a book document while turning over pages of the book, image data representative of two spread pages of a book document are stored in a frame memory. Among the image data, image data matching the front of a sheet are read out of the frame memory first and then output on the front of a fresh sheet. Then, an image is formed on the rear of a sheet refed from a duplex copy tray or refeed tray. Alternatively, an arrangement may be made such that, among two pages of image data, the image data read last are out of the frame memory first and then output on the front of a fresh sheet, and then an image is formed on the rear of a sheet refed from the refeed tray.

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Warabi, Japan

Kazushige Taguchi