US Patent Application 18224647. ELECTROPHOTOGRAPHIC IMAGE FORMING APPARATUS simplified abstract

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ELECTROPHOTOGRAPHIC IMAGE FORMING APPARATUS

Organization Name

CANON KABUSHIKI KAISHA


Inventor(s)

Ken Kikuchi of Mishima-shi (JP)

ELECTROPHOTOGRAPHIC IMAGE FORMING APPARATUS - A simplified explanation of the abstract

This abstract first appeared for US patent application 18224647 titled 'ELECTROPHOTOGRAPHIC IMAGE FORMING APPARATUS

Simplified Explanation

The patent application describes an electrophotographic image forming apparatus that includes a developing cartridge and a photosensitive drum.

  • The developing cartridge has a developing roller for developing a latent image on the drum.
  • It also has a developer accommodating portion for holding the developer used by the developing roller.
  • The cartridge has a developing roller shutter that can be moved between a protecting position and a retracted position.
  • The developing cartridge can be easily detached from the main assembly of the apparatus.
  • A cartridge supporting member is provided to mount and remove the developing cartridge.
  • The cartridge supporting member can be moved between an inside position and an outside position.
  • A force receiving portion on the developing cartridge receives a force to move the developing roller shutter.
  • A force applying portion in the main assembly provides the force to move the developing roller shutter.
  • When the cartridge supporting member is moved from the outside position to the inside position, the force receiving portion contacts the force applying portion.
  • This contact causes the cartridge supporting member to move inside and the developing roller shutter to retract from the protecting position to the retracted position.


Original Abstract Submitted

An electrophotographic image forming apparatus includes an electrophotographic photosensitive drum; a developing cartridge including a developing roller for developing a latent image formed on the drum, a developer accommodating portion for accommodating a developer to be used by the developing roller to develop the electrostatic latent image, and a developing roller shutter movable between a protecting position for covering a part of a peripheral surface of the developing roller and a retracted position, retracted from the protecting position, for exposure the part of the peripheral surface of the developing roller, wherein the developing cartridge is detachably mountable to a main assembly of the apparatus; a cartridge supporting member movable, while detachably mounting the developing cartridge, between an inside position which is inside of the main assembly of the apparatus to Mount the developing cartridge to the main assembly of the apparatus and an outside position which is outside of the main assembly of the apparatus to remove the developing cartridge from the main assembly of the apparatus; a force receiving portion, provided on the developing cartridge, for receiving a force for moving the developing roller shutter from the protecting position to the retracted position; and a force applying portion provided in the main assembly of the apparatus, wherein when the cartridge supporting member is moved from the outside position to the inside position, the force receiving portion contacts to the force applying portion to move the cartridge supporting member from the outside position to the inside position, in interrelation with which the force receiving portion contacted to the force applying portion receives the force from the force applying portion, thus moving the developing roller shutter from the protecting position to the retracted position.

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