Tokyo Electric Co.

Yoshihide Akuzawa

Hiromasa Urata

Osamu Aoki

Yoshitaka Ukai

Yutaka Hira

Yasutoshi Serizawa

Yukihiko Kambe

Saburo Shimatani

An image reading apparatus includes a light source for illuminating a document, and a line image CCD for performing photoelectric conversion on the light reflected from the document. Particularly, the image reading apparatus further includes a light shutting device for selectively shutting off the light directed toward the line image CCD, and a processing section for obtaining, as reference black data, the output data of the line image CCD produced in a state where the light directed toward the line image CCD is shut off, for obtaining, as image data of the document, the output data of the line image CCD produced in a state where the light directed toward the line image CCD is not shut off, and for performing shading correction on the image data according to the reference black data.

Image reading apparatus and method using light shutter for blocking

A color image reading apparatus connected to an image data processing apparatus for the supply of a read-in image to the latter, image data processing apparatus comprises a photoelectric converting element for receiving a color manuscript image and for converting this image into electrical image data, a memory for memorizing color correction coefficients, which are used to enable the image data processing apparatus to perform proper color correction, and which, according to the signal from the image data processing apparatus, supplies the electrical image data and the color correction coefficients to the image data processing apparatus.

Color image reading apparatus having color correction coefficients

An optical document reader which uses a document keeper to hold a document in place on a document table and which moves an optical unit in the secondary scanning direction along a shaft for optically reading the document. The shaft is supported by a support member which rotates around one end of a support shaft and along the document table. The support member, externally rotated by an adjusting mechanism, is rotatably released by a clutch mechanism. A support member returning mechanism returns the support member to its home position when the member is rotatably released by the clutch mechanism. If the side edge of the document is inclined against that of the document table, the adjusting mechanism rotates the support member to align the optical unit with the document in the secondary scanning direction. When the clutch mechanism rotatably releases the support member afterwards, the support member returning mechanism accurately returns the member to its home position.

Optical document reader

A lid opening and closing device is disclosed which comprises a plate spring having thereon an engagement portion disposed on the side of a lid and an engagement portion to engage with the engagement portion on the plate spring formed on the side of a housing, whereby the lid can be held opened at a certain angle of opening, a lid pivot for bearing a fulcrum pin on the lid side provided on the housing side for vertical movement while being urged downward, whereby reading of an original is ensured even if the thickness of the original is varied, and flat portions formed on the fulcrum pin and a cut corresponding to the flat portions made in the lid pivot, whereby the fulcrum pin can be detached from the lid pivot, thus performing necessary functions with a simple structure occupying a samll space on the whole.

Lid opening and closing device for image input apparatus

An apparatus for securing a typewriter, includes a locking device for locking an outer case in a closed position and a fastening device for fastening a bottom plate of the case to a mounting base. When opened, the cover permits a portion of the bottom plate to be exposed. The fastening device is brought, from inside the case, into engagement with the bottom plate of the case through the exposed portion of the bottom plate, thereby locking the typewriter to the mounting base. The fastening device for the bottom plate cannot be released unless the locking device is unlocked by a key to open the cover. Accordingly, only a keyholder can unlock the locking device, thus preventing the typewriter from being stolen. Further, since the fastening device is engaged with the bottom plate of the typewriter case, the outer appearance of the typewriter is not degraded.

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Shizuoka, Japan

Yoshihide Akuzawa