Splice Detection in Belt-Shaped Medium Transport
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing medium transport systems, particularly in image forming apparatuses, face challenges in accurately detecting and managing splices in continuous paper rolls, leading to potential image formation issues and inefficiencies.
Innovation Solution
A medium transport apparatus equipped with a transport unit, detection unit, and determining unit that utilizes marks on the medium to identify splices by detecting variations in mark intervals, allowing for precise positioning and adjustment during the image forming process, thereby preventing image formation on splice areas.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If marks are used to detect splice positions on the medium, then splice detection accuracy is improved, but the complexity of the detection system increases
Solution Approach 1:
Marks are pre-formed on the medium at known intervals before the medium enters the detection system. This preliminary placement of detection references eliminates the need for complex real-time splice analysis, as the system only needs to detect deviations from the known mark pattern, thereby improving detection accuracy while maintaining system simplicity
Solution Approach 2:
The marks serve as an intermediary element between the splice and the detection system. Instead of directly detecting the splice, the system detects the marks and infers splice position from mark interval deviations. This intermediary approach simplifies the detection mechanism while maintaining high precision
2Reliability
If the apparatus stops to handle splices, then image formation quality is improved, but productivity decreases
Solution Approach 1:
The detection system identifies splice positions through mark interval analysis and allows the apparatus to skip over splice areas by adjusting the transport or image formation process. This enables continuous operation without stopping, maintaining productivity while ensuring image quality by avoiding splice defects
Solution Approach 2:
The system continuously monitors mark positions and provides real-time feedback on splice detection. This feedback mechanism enables dynamic adjustment of the image formation process to avoid splice areas, maintaining image quality while allowing continuous operation without interruptions
3Manufacturing precision
If mark detection is used to identify splice positions, then positioning accuracy is improved, but the difficulty of detecting and measuring increases
Solution Approach 1:
The detection process is segmented into distinct steps: detecting individual marks, measuring intervals between consecutive marks, comparing intervals to predetermined values, and determining splice positions. This segmentation simplifies the overall measurement task by breaking it into manageable, sequential operations that reduce detection difficulty while maintaining high positioning accuracy
Data Source
AI summary
A medium transport apparatus includes: a transport unit transporting a belt-shaped medium having plural marks formed in line at predetermined intervals in a transport direction; a detection unit detecting the marks on the medium; and a determining unit determining that a splice exists at a position on the medium if an interval of the marks detected from the medium by the detection unit differs from the predetermined intervals, the position being identified by the marks having the interval different from the predetermined intervals.