17889568. DOCUMENT FEEDING APPARATUS, IMAGE READING APPARATUS, AND IMAGE FORMING APPARATUS simplified abstract (CANON KABUSHIKI KAISHA)

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DOCUMENT FEEDING APPARATUS, IMAGE READING APPARATUS, AND IMAGE FORMING APPARATUS

Organization Name

CANON KABUSHIKI KAISHA

Inventor(s)

Chiaki Yoshiwara of Ibaraki (JP)

DOCUMENT FEEDING APPARATUS, IMAGE READING APPARATUS, AND IMAGE FORMING APPARATUS - A simplified explanation of the abstract

This abstract first appeared for US patent application 17889568 titled 'DOCUMENT FEEDING APPARATUS, IMAGE READING APPARATUS, AND IMAGE FORMING APPARATUS

Simplified Explanation

The patent application describes a document feeding apparatus that includes various components such as a document tray, feed roller, separation conveying unit, first detecting unit, and a control unit.

  • The first detecting unit is responsible for detecting the presence or absence of a document at a specific position using a flag member with different protrusion amounts.
  • The control unit operates in two modes - the first mode where it performs a detecting process to determine the presence or absence of a document before lowering the feed roller, and the second mode where it performs a detecting process after lowering the feed roller.
  • The purpose of these modes is to accurately detect the presence or absence of a document at the specific position and make appropriate decisions based on the detection results.

Potential applications of this technology:

  • Document scanning devices: The document feeding apparatus can be used in scanners to ensure accurate document detection and feeding.
  • Photocopiers: This technology can be implemented in photocopiers to improve the document feeding process and prevent errors.
  • Fax machines: Fax machines can benefit from this technology to enhance document handling and improve overall performance.

Problems solved by this technology:

  • Accurate document detection: The patent application addresses the need for precise detection of the presence or absence of a document at a specific position.
  • Error prevention: By implementing the two detecting modes, the technology aims to minimize errors in document feeding and improve overall reliability.

Benefits of this technology:

  • Improved efficiency: The accurate detection of document presence or absence helps streamline the document feeding process and reduces the need for manual intervention.
  • Enhanced reliability: By minimizing errors and ensuring proper document handling, this technology improves the overall reliability of document feeding apparatuses.
  • User-friendly operation: The control unit's ability to switch between different detecting modes simplifies the operation of the document feeding apparatus and enhances user experience.


Original Abstract Submitted

A document feeding apparatus includes a document tray, a feed roller, a separation conveying unit, a first detecting unit and a control unit. The first detecting unit detects that the document is at the first detecting position when a protrusion amount of a flag member is a first amount and detects that no document is at the first detecting position when the protrusion amount is a second amount. The control unit executes an operation in a first mode in which a first detecting process is executed so as to detect the presence or absence of the document before starting to lower the feed roller and the presence or absence is determined, and in a second mode in which a second detecting process is executed so as to detect the presence or absence at the first detecting position after lowering said feed roller and the presence or absence is determined.

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