Sheet Detector for Automated Maintenance Control in Image Forming Apparatus

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Solution Overview

Problem

Conventional image forming apparatuses require users to input information about the type of recording sheet every time the sheet type is changed, leading to inefficiencies in maintenance control, particularly in managing conveyance systems where sheet dust can cause conveying force decreases.

Innovation Solution

An image forming apparatus equipped with a sheet detector in the conveyance path that automatically detects the type of sheet and a controller that performs maintenance control based on the detected sheet type, eliminating the need for user input.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If manual sheet type input is required, then maintenance control can be performed based on sheet type, but user time and effort increase significantly

Engineering Contradiction:

Improvemaintenance control accuracyVSAvoiduser input time

Core Design Contradiction:

ReliabilityVSLoss of time

Solution Approach 1:

The sheet detector automatically detects sheet type without user input, making the system self-serving. The detector captures sheet type information autonomously and provides it to the controller, eliminating the need for manual user input while maintaining accurate maintenance control based on detected sheet types

Inventive Principle:

Principle #25Self-service

Solution Approach 2:

The manual input mechanism is replaced with an automated sheet detector system. The detector uses optical or sensing mechanisms to automatically identify sheet type, substituting the mechanical/manual input process with an automated detection system that provides the same information needed for maintenance control

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

2Ease of operation

If sheet type information is not tracked, then user effort is reduced, but maintenance timing becomes inaccurate

Engineering Contradiction:

Improveoperation simplicityVSAvoidmaintenance timing accuracy

Core Design Contradiction:

Ease of operationVSReliability

Solution Approach 1:

The sheet detector provides continuous feedback about sheet type to the controller. This feedback loop allows the system to automatically track which sheets are being used and when maintenance is needed, maintaining accurate maintenance timing without requiring user input or complicating the operation interface

Inventive Principle:

Principle #23Feedback

3Extent of automation

If automated sheet detection is implemented, then maintenance control is automated, but device complexity increases

Engineering Contradiction:

Improvemaintenance automation levelVSAvoidsystem structure complexity

Core Design Contradiction:

Extent of automationVSDevice complexity

Solution Approach 1:

The sheet detector serves multiple functions: it detects sheet type for maintenance control, identifies sheet characteristics for optimal processing, and provides data for both operational and maintenance decisions. This multi-functionality justifies the added complexity by providing comprehensive automation benefits across multiple system aspects

Inventive Principle:

Principle #6Universality (Multi-functionality)

Data Source

PatentUS20250036062A1Image forming apparatus, image forming system, computer- readable storage medium storing program, and method of controlling image forming apparatus

Publication Date: 2025.01.30 KONICA MINOLTA INC

AI summary

An image forming apparatus includes, an image former that forms an image on a sheet, a conveyance path in which the sheet is conveyed to the image former, a sheet detector that is provided in the conveyance path and that detects a type of the sheet conveyed on the conveyance path; and a controller that performs control related to maintenance of the conveyance path based on the type of the sheet detected by the sheet detector.