Color image forming apparatus

• US 5,646,749 A
• Filed: 03/19/1996
• Issued: 07/08/1997
• Est. Priority Date: 03/20/1995
• Status: Expired due to Fees

• Current Assignee: Ricoh Company Limited
• Original Assignee: Ricoh Company Limited
• Inventors: Nagahara, Yasumori, Omi, Kyoji
• Primary Examiner(s): Rogers, Scott A.
• Application Number:
  US08/618,152
• Time in Patent Office: 476 Days
• Field of Search: 358/501, 358/540, 358/300, 347/115, 347/128, 347/232, 355/326 R, 355/327
• US Class Current: 358/501
• CPC Class Codes: H04N 1/46 Colour picture communication systems
• CPC Class Codes: H04N 1/508 using the same reproducing head for two or more colour components

Abstract

A color image forming apparatus is provided with a printer controller which is capable of receiving color image data for one page, which is divided into a plurality of data for each of a corresponding plurality of colors, at an irregular interval, and, upon receiving the image data for one color, driving an image forming device to form an image of the color whose data has been received, and after images of all of the plurality of colors are completed, outputting the final image on a recording media. The image forming device may also include, an intermediate image transfer belt for forming thereupon an image of each of the plurality of colors, superposing one on another, and a leading edge detect sensor to detect a leading edge of an image of each of the plurality of colors for registering the leading edges of images of the plurality of colors. The apparatus may further include, in addition to a scanner and a printer, a system controller which issues an image formation command for each of the plurality of colors to the scanner and the printer at a regular interval in a copy mode, and to the printer at an irregular interval in a print mode.

Claims

1. A color image forming apparatus, comprising:

an image data input device receiving color image data for one page in a form divided into a plurality of data for each of a corresponding plurality of colors;

an image forming device converting image data for each of the plurality of colors to a visible image; and

a printer controller receiving image data for each of the plurality of colors at an irregular interval and driving the image forming device, upon receiving the image data for one color, to form an image of the one color whose data has been received, and after completing image formation for all of the plurality of colors, forming a final image and outputting the final image on a recording media as a visible image.

2. The color image forming apparatus according to claim 1, wherein said image forming device includes a device for detecting a leading edge of an image, and said printer controller registers leading edges of images of the plurality of colors based upon a detecting signal from said leading edge detecting device.

3. The color image forming apparatus according to claim 1, wherein said image forming device includes an intermediate image transfer belt for forming thereupon an image of each of the plurality of colors one by one superposing one on top of another.

4. The image forming apparatus according to claim 3, wherein said image forming device includes a device for detecting a leading edge of an image which is formed on said intermediate image transfer belt, and said printer controller registers leading edges of images of the plurality of colors based upon a detecting signal from said leading edge detecting device.

5. A color image forming apparatus, comprising:

a printer module including;

an image data input device receiving color image data for one page in a form divided into a plurality of data for each of a corresponding plurality of colors,

an image forming device converting image data for each of the plurality of colors to a visible image, and

a printer controller receiving image data for each of the plurality of colors at an irregular interval and driving the image forming device, upon receiving the image data for one color, to form an image of the one color whose data has been received, and after completing image formation for all of the plurality of colors, forming a final image and outputting the final image on a recording media as a visible image;

a scanner module including;

an image reading device reading an image, separating the image in color for each picture element,

an image processing device converting color image data which are obtained by the image reading device to image recording data, and

an image data output device; and

a system control module including;

a copy processor issuing to the scanner module and the printer module an image formation command for each of the plurality of colors at a regular interval, and

a print processor issuing to the printer module an image formation command for each of the plurality of colors at an irregular interval.

6. A color image forming apparatus, comprising:

an image data input means for receiving color image data for one page in a form divided into a plurality of data for each of a corresponding plurality of colors;

an image forming means for converting image data for each of the plurality of colors to a visible image; and

a printer control means for receiving image data for each of the plurality of colors at an irregular interval and driving the image forming means, upon receiving the image data for one color, to form an image of the one color whose data has been received, and after completing image formation for all of the plurality of colors, forming a final image and outputting the final image on a recording means as a visible image.

7. The color image forming apparatus according to claim 6, wherein said image forming means includes a means for detecting a leading edge of an image, and said printer control means registers leading edges of images of the plurality of colors based upon a detecting signal from said leading edge detecting means.

8. The color image forming apparatus according to claim 6, wherein said image forming means includes an intermediate image transfer means for forming thereupon an image of each of the plurality of colors one by one superposing one on top of another.

9. The image forming apparatus according to claim 8, wherein said image forming means includes a means for detecting a leading edge of an image which is formed on said intermediate image transfer means, and said printer control means registers leading edges of images of the plurality of colors based upon a detecting signal from said leading edge detecting means.

10. The image forming apparatus according to Claim 6, further comprising:

a scanner means including;

an image reading means reading an image, separating the image in color for each picture element,

an image processing means converting color image data which are obtained by the image reading means to image recording data.

11. The image forming apparatus according to claim 10, further comprising:

a system control means including;

a copy processor means for issuing to the scanner means and the print control means an image formation command for each of the plurality of colors at a regular interval, and

a print processor means for issuing to the print control means an image formation command for each of the plurality of colors at an irregular interval.