Image forming apparatus and image forming method

Inactive Publication Date: 2005-09-29
CANON KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Benefits of technology

[0027] It is, therefore, an object of the present invention to provide an image forming apparatus and image forming metho

Problems solved by technology

In particular, color page printers are attracting attention because they are silent and capable of high-quality, high-speed printing.
Unfortunately, the improved printing perfor

Method used

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  • Image forming apparatus and image forming method
  • Image forming apparatus and image forming method
  • Image forming apparatus and image forming method

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Embodiment Construction

[0060] Preferred embodiments of the present invention will now be described in detail in accordance with the accompanying drawings.

[0061]FIG. 1 is a sectional view showing the structure of an image forming apparatus A according to one embodiment of the present invention.

[0062] In this image printing apparatus A, a gripper 103f grips the leading edge of a paper sheet 102 fed from a paper feeder 101, holding the paper sheet 102 on the circumferential surface of a transfer drum 103.

[0063] Latent images formed by different colors on an image carrier 100 by an optical unit 107 are developed by developing devices (Dy, Dc, Dm, and Db) of the corresponding colors and transferred a plurality of times onto the paper sheet held on the circumferential surface of the transfer drum 103, thereby forming a multicolor image.

[0064] After that, the paper sheet 102 is separated from the transfer drum 103, fixed by a fixing unit 104, and delivered to a paper delivery tray 106 by a paper delivery uni...

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PUM

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Abstract

An image forming apparatus for forming an image of multilevel image data includes a driving unit for driving an image forming element for image formation, an additional data generating unit for generating a digital signal string based on predetermined additional data, and an input unit for superposing a digital signal string related to the multilevel image data and the digital signal string based on the additional data and inputting the superposed digital signal string to the driving unit.

Description

FIELD OF THE INVENTION [0001] The present invention relates to an image forming apparatus and image forming method and, more particularly, to an image forming apparatus and image forming method capable of contributing to prevention of, e.g., copying of securities. BACKGROUND OF THE INVENTION [0002] Recently, image forming apparatuses such as printers have been given color capability and used as various expressing means by users. In particular, color page printers are attracting attention because they are silent and capable of high-quality, high-speed printing. [0003] A multicolor beam printer as one color page printer is characterized by printing a multicolor image by performing first development by scanning a light beam on a photosensitive body in a main scan direction, and then transferring the image onto a printing medium such as a printing paper sheet on a transfer carrier to perform predetermined processing. [0004] A method of printing a multicolor image by this multicolor beam...

Claims

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Application Information

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IPC IPC(8): H04N1/00H04N1/387
CPCH04N1/3871H04N1/00838
Inventor KAWANA, TAKASHI
Owner CANON KK
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