18603464. IMAGE FORMING APPARATUS simplified abstract (CANON KABUSHIKI KAISHA)

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IMAGE FORMING APPARATUS

Organization Name

CANON KABUSHIKI KAISHA

Inventor(s)

Naonari Hashimura of Chiba (JP)

IMAGE FORMING APPARATUS - A simplified explanation of the abstract

This abstract first appeared for US patent application 18603464 titled 'IMAGE FORMING APPARATUS

Simplified Explanation

The image forming apparatus described in the patent application includes a developing device with three rollers: a developing roller, a supply roller, and a conductive roller. These rollers are biased and rotationally driven during image formation to ensure proper toner charging. The polarity of the potentials between the rollers is crucial for achieving the correct charge polarity of the toner.

  • Developing device with developing roller, supply roller, and conductive roller
  • Rollers biased and rotationally driven during image formation
  • Polarity of potentials between rollers important for toner charge polarity

Key Features and Innovation

  • Developing device with three rollers for image formation
  • Biasing and rotationally driving the rollers during image formation
  • Polarity of potentials between rollers crucial for toner charge polarity

Potential Applications

The technology can be applied in various image forming devices such as printers, copiers, and multifunction devices.

Problems Solved

Ensures proper toner charging during image formation, leading to high-quality prints and copies.

Benefits

  • Consistent and accurate toner charging
  • Improved image quality
  • Reliable performance of image forming apparatus

Commercial Applications

  • Printers
  • Copiers
  • Multifunction devices

Questions about Image Forming Apparatus

What is the role of the conductive roller in the developing device?

The conductive roller helps in maintaining the correct charge polarity of the toner during image formation by subtracting its DC potential from that of the developing roller.

How does biasing the rollers contribute to the image forming process?

Biasing the rollers ensures that the toner is properly charged, leading to high-quality prints and copies.


Original Abstract Submitted

An image forming apparatus includes a developing device including a developing roller, a supply roller, and a conductive roller. During image formation, a bias is applied to each of the supplying roller, the developing roller, and the conductive roller in a state in which each of the supplying roller, the developing roller, and the conductive roller is rotationally driven. During the image formation, a polarity of a first potential obtained by subtracting a DC potential of the developing roller from a DC potential of the supplying roller is the same as a normal charge polarity of the toner, and a polarity of a second potential obtained by subtracting the DC potential of the developing roller from a DC potential of the conductive roller is the same as the normal charge polarity of the toner.