Nisca Corporation

Canon Finetech Nisca Inc.

Seiko Epson Corporation

Mitsuhiro Ishihara

Takashi Saito

Isao Kondo

Hiroshi Yabe

Mineo Kubota

Akira Takei

Yutaka Tanaka

Toshiaki Oshima

Takashi Kanda

Tetsuya Aiyama

Makoto Shimizu

Yoshinori Kanesaka

Masaki Oshima

Mitsuo Tsuchiya

Toru Kitta

The present invention is to provide a sheet bundle binding device capable of easily removing some sheets from a sheet bundle that has been subjected to staple-free binding. A corner Sc of a first sheet bundle which is accumulated on a processing tray is subjected to proper binding using a staple needle by a staple binding unit. Then, a corner of a second sheet bundle obtained by accumulating additional sheets on the first sheet bundle is pressed and deformed between crimping toothed parts of a staple-free binding unit to temporarily bind the second sheet bundle. Thus, the additional sheets can easily be removed from the second sheet bundle.

Sheet bundle binding device and image forming system having the same

The present invention is to provide a sheet bundle binding device having both a staple binding unit and a staple-free binding unit, capable of performing binding in two stages of proper binding and temporary binding so as to obtain a desired binding force and to easily remove some sheets from a bound sheet bundle. A binding control section determines, based on user's settings, whether or not to perform first binding in which a first sheet bundle Sbis subjected to the proper binding using the staple binding unit or staple-free binding unit and determines whether or not to perform second binding in which a second sheet bundle obtained by accumulating additional sheets on the first sheet bundle is subjected to the temporary binding using the staple-free binding unit so as to control binding forces with which the first and second sheet bundles are bound.

There are provided a platen on which an original is mounted, a line sensor that performs photoelectric conversion on light from the original on the platen, a first carriage that moves along the platen and guides the light from the original to the line sensor, a first housing that stores and supports the first carriage to be movable along the platen, first driving means for moving the first carriage, a second carriage provided with a plurality of rod-shaped light-source lamps that applies light to the original, a second housing that stores and supports the second carriage to be movable along the platen and covers the platen, second driving means for moving the second carriage, and control means for controlling the first driving means, the second driving means and lighting of the plurality of light-source lamps.

Image reading apparatus

An image reading apparatus includes a platen, a frame for holding the platen, an installation device disposed to the frame so that the platen can be held in a substantially vertical state, and a scanning device for reading a document along the platen substantially vertically held. The reading of the document is carried out by elevating or lowering the scanning device.

Shading correction is effected by partitioning a white standard surface into a plurality of scanning blocks having the same number of scanning lines, scanning the standard surface by block to determine block median values in a first processing stage, determining global median values from the block median values in a second processing stage, and subjecting objective image data read from a given original image to arithmetic such as proportioning calculation. With the two-stage processing, shading distortion caused due to nonuniformity in sensitivity of an image scanning system can be rationally and reliably corrected to a high degree with a simple processing circuit.

Shading correction method and apparatus

Growing community of inventors

Yamanashi-ken, Japan

Mitsuhiro Ishihara