Printing Apparatus Tray Detection and Destination Control

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Solution Overview

Problem

Conventional image forming apparatuses face issues where paper discharge settings are cleared when a sheet processing apparatus is disconnected or reconnected, leading to unintended paper discharge destinations, causing user confusion and requiring cumbersome re-settings.

Innovation Solution

The solution involves a mechanism in the printing apparatus that updates paper discharge destination information based on the number and type of paper discharge trays in the newly connected sheet processing apparatus, ensuring that sheets are directed to the intended tray without requiring manual re-settings, by comparing tray counts and types and resetting initial values as necessary.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If the paper discharge destination setting is cleared when a sheet processing apparatus is disconnected, then the system can adapt to the newly connected apparatus, but the user must re-set the paper discharge destination causing confusion and loss of time

Engineering Contradiction:
Improveadaptability to newly connected sheet processing apparatusVSAvoidtime required for re-setting paper discharge destination
Core Design Contradiction:
Adaptability or versatilityVSLoss of time

Solution Approach 1:

The system performs preliminary actions by detecting the connection status of the sheet processing apparatus and automatically adjusting paper discharge destination settings before the user initiates any printing operation. When a sheet processing apparatus is detected to be connected, the system proactively configures the paper discharge destination based on the apparatus type and tray count, eliminating the need for user re-setting.

Inventive Principle:
Principle #10Preliminary action

Solution Approach 2:

The system enables self-service by automatically detecting when a sheet processing apparatus is connected or disconnected, identifying the apparatus type, counting the number of paper discharge trays, and autonomously configuring the paper discharge destination settings without requiring user intervention. The system serves itself by monitoring its own operational environment and making appropriate adjustments.

Inventive Principle:
Principle #25Self-service

2Reliability

If the paper discharge destination setting is maintained in memory, then user settings are preserved, but sheets may be discharged to unintended trays when a different sheet processing apparatus is connected

Engineering Contradiction:
Improvepreservation of user settingsVSAvoidunintended paper discharge to wrong tray
Core Design Contradiction:
ReliabilityVSObject-affected harmful factors

Solution Approach 1:

The system implements feedback by continuously monitoring the connection status of the sheet processing apparatus and comparing the current apparatus characteristics with the stored settings. When a discrepancy is detected (such as a different apparatus type or tray count), the system receives feedback about the mismatch and automatically adjusts the paper discharge destination settings to match the current apparatus configuration, preventing unintended discharge.

Inventive Principle:
Principle #23Feedback

Solution Approach 2:

The system applies dynamics by making the paper discharge destination settings flexible and adaptive rather than static. The settings automatically change based on the connected sheet processing apparatus characteristics, allowing the system to transition between different configurations as apparatuses are connected or disconnected, ensuring settings always match the current operational environment.

Inventive Principle:
Principle #15Dynamics

3Manufacturing precision

If manual re-setting is required after disconnection and reconnection, then settings can be accurate, but the operation becomes cumbersome and complex

Engineering Contradiction:
Improveaccuracy of paper discharge destination settingVSAvoidease of setting paper discharge destination
Core Design Contradiction:
Manufacturing precisionVSEase of operation

Solution Approach 1:

The system performs self-service by automatically detecting the sheet processing apparatus connection, identifying the apparatus type, counting the paper discharge trays, and configuring the paper discharge destination settings without any user action required. This maintains accurate settings while completely eliminating the manual re-setting operation.

Inventive Principle:
Principle #25Self-service

Solution Approach 2:

The system introduces an intermediary mechanism (the control unit) that acts as a mediator between the sheet processing apparatus connection and the paper discharge destination settings. This intermediary automatically translates apparatus connection information into appropriate settings, removing the need for direct user intervention and simplifying the operation while maintaining accuracy.

Inventive Principle:
Principle #24Intermediary (Mediator)

Data Source

PatentEP2549337B1Printing apparatus, control method therefor, and program
Publication Date: 2020.01.22 CANON KK
  • EP2549337B1 patent drawingFigure 1
  • EP2549337B1 patent drawingFigure 2
  • EP2549337B1 patent drawingFigure 3~4

AI summary

When a sheet processing apparatus is newly connected, discharge of sheets to a paper discharge tray the user does not intend is prevented while omitting cumbersome settings regarding the sheet processing apparatus. To accomplish this, a printing apparatus stores, in storage means, information for determining a paper discharge destination to which sheets are to be discharged from among a plurality of paper discharge destinations. In a case where a newly connected sheet processing apparatus is a sheet processing apparatus of the same type as an immediately previously connected sheet processing apparatus, the printing apparatus does not change the information stored in the storage means. In a case where a newly connected sheet processing apparatus is a sheet processing apparatus of a different type, the printing apparatus updates the information stored in the storage means.