18139466. DEVELOPING DEVICE simplified abstract (CANON KABUSHIKI KAISHA)

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DEVELOPING DEVICE

Organization Name

CANON KABUSHIKI KAISHA

Inventor(s)

Masashi Wakisaka of Saitama (JP)

DEVELOPING DEVICE - A simplified explanation of the abstract

This abstract first appeared for US patent application 18139466 titled 'DEVELOPING DEVICE

Simplified Explanation

The patent application describes a developing device that includes a conveying screw and an inductance sensor. The inductance sensor is capable of detecting the magnetic permeability of the developer in a developing container. The detection sensitivity of the sensor is such that it can detect magnetic permeability even when the magnetic material is positioned 1 mm away from the sensor.

  • The inductance sensor has high detection sensitivity for magnetic permeability.
  • The conveying screw includes a rotary shaft, a spiral blade on the outer circumference of the shaft, and a rib that protrudes outwardly from the shaft.
  • The rib is positioned opposite the detector in the conveying direction of the screw.
  • The rib is equipped with a magnet.

Potential Applications

  • This developing device can be used in various printing or copying machines that require precise detection of magnetic permeability in the developer.
  • It can be applied in industrial processes where accurate monitoring of magnetic materials is necessary.

Problems Solved

  • The device solves the problem of accurately detecting the magnetic permeability of the developer in a developing container.
  • It addresses the issue of maintaining detection sensitivity even when the magnetic material is not in direct contact with the sensor.

Benefits

  • The high detection sensitivity of the inductance sensor ensures accurate monitoring of the magnetic permeability.
  • The presence of the rib with a magnet in the conveying screw enhances the detection capabilities of the device.
  • The simplified design of the device makes it easy to implement and maintain.


Original Abstract Submitted

Disclosed is a developing device including a conveying screw and an inductance sensor. The inductance sensor includes a detector detecting magnetic permeability of the developer accommodated in a developing container and has such detection sensitivity that the detection sensitivity with which the detector detects magnetic permeability when a magnetic material is disposed at a position 1 mm away from the detector in a vertical direction is 10% or more of that when magnetic material is disposed at a position which is in contact with the detector. The conveying screw includes a rotary shaft; a blade which is spirally formed on an outer circumference of the rotary shaft; and a rib formed as to protrude outwardly from the outer circumference of the rotary shaft. The rib is disposed opposite the detector with respect to a conveying direction of the conveying screw. The rib is provided with a magnet.

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