Sheet Type Detection in Image Forming Apparatus
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Solution Overview
Problem
Image forming apparatuses face inefficiencies in sheet type detection during printing preparation, leading to decreased productivity and increased standby time due to reliance on user input and incorrect prediction of sheet types, resulting in unnecessary condition switching.
Innovation Solution
Incorporating a conveyor system with a detector on the conveying path to autonomously detect sheet types before initiating the image forming process, allowing for pre-emptive setting of optimal printing conditions and reducing user intervention.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If sheet type determination is performed during printing preparation operation, then printing conditions can be set appropriately, but the operation cannot start unless a print job is input and user intervention is required
Solution Approach 1:
The detector performs sheet type determination in advance during tray loading or before print jobs are submitted, rather than waiting for printing preparation. This preliminary detection stores sheet type information ready for immediate use, eliminating the need to wait for print job input while maintaining accurate printing condition setting.
2Reliability
If sheet type determination is performed during printing preparation, then appropriate printing conditions are set, but standby time increases when predicted sheet type differs from actual
Solution Approach 1:
Sheet type detection is performed in advance during tray loading or before printing preparation, storing the detected sheet type information. When a print job is submitted, the system retrieves pre-detected sheet type information and sets printing conditions immediately without performing detection during preparation, eliminating standby time caused by condition switching.
Solution Approach 2:
The system continuously monitors tray contents and performs detection when changes are detected, using feedback from tray loading events to trigger advance detection. This ensures sheet type information is updated and ready before printing preparation begins, preventing mismatches between predicted and actual sheet types.
3Reliability
If user must check sheet type each time sheet is switched, then printing conditions can be adjusted, but productivity decreases
Solution Approach 1:
The detector automatically performs sheet type determination without requiring user intervention. The system autonomously detects sheet types during tray loading or before print jobs, retrieves stored detection results, and sets printing conditions automatically, eliminating the need for users to manually check sheet types and significantly improving operational efficiency.
Data Source
AI summary
Provided is an image forming apparatus capable of detecting a type of a sheet accommodated in a sheet feeding tray in advance. The image forming apparatus includes a conveyor, an image former, a fixer, a detector, and a processor. The conveyor conveys the sheet accommodated in the sheet feeding tray along a conveying path. The image former forms an image on the sheet. The fixer fixes the image onto the sheet. The detector is arranged on the conveying path and detects the type of the sheet. The processor executes a sheet type detection mode which is a mode for causing the detector to detect the type of the sheet conveyed by the conveyor before executing an image forming mode which is a mode for causing the image former to form the image and causing the fixer to fix the image.